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431 lines
58 KiB
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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.128.1661" ID-GBIF-Dataset="2c6ce82f-c921-4ae4-a98b-374091e3469a" ID-PMC="PMC3175139" ID-Pensoft-Pub="1313-2970-128-53" ID-PubMed="21998551" ModsDocAuthor="" ModsDocDate="2011" ModsDocID="1313-2970-128-53" ModsDocOrigin="ZooKeys 128" ModsDocTitle="A new marine interstitial Psammogammarus (Crustacea, Amphipoda, Melitidae) from Gura Ici Island, off western Halmahera (North Moluccas, Indonesia), and an overview of the genus" checkinTime="1451249914364" checkinUser="pensoft" docAuthor="Vonk, Ronald, Hoeksema, Bert W. & Jaume, Damia" docDate="2011" docId="587588D4ECCC2EC67AF3B4B4F07B65B0" docLanguage="en" docName="ZooKeys 128: 53-73" docOrigin="ZooKeys 128" docSource="http://dx.doi.org/10.3897/zookeys.128.1661" docTitle="Psammogammarus wallacei Vonk, Hoeksema & Jaume, 2011, sp. n." docType="treatment" docVersion="4" lastPageNumber="62" masterDocId="BC79FFB96475B266FFDB116DFFB64564" masterDocTitle="A new marine interstitial Psammogammarus (Crustacea, Amphipoda, Melitidae) from Gura Ici Island, off western Halmahera (North Moluccas, Indonesia), and an overview of the genus" masterLastPageNumber="73" masterPageNumber="53" pageNumber="54" updateTime="1668152083888" updateUser="ExternalLinkService">
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<mods:titleInfo>
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<mods:title>A new marine interstitial Psammogammarus (Crustacea, Amphipoda, Melitidae) from Gura Ici Island, off western Halmahera (North Moluccas, Indonesia), and an overview of the genus</mods:title>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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<mods:namePart>Vonk, Ronald</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Hoeksema, Bert W.</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Jaume, Damia</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:title>ZooKeys</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2011</mods:date>
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<mods:detail type="volume">
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<mods:number>128</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>53</mods:start>
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<mods:end>73</mods:end>
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<mods:url>http://dx.doi.org/10.3897/zookeys.128.1661</mods:url>
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</mods:location>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.128.1661</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-128-53</mods:identifier>
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<treatment ID-GBIF-Taxon="152030694" LSID="urn:lsid:zoobank.org:act:5E679036-2477-4485-BAD0-6F6D452D2288" httpUri="http://treatment.plazi.org/id/587588D4ECCC2EC67AF3B4B4F07B65B0" lastPageId="9" lastPageNumber="62" pageId="1" pageNumber="54">
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<subSubSection pageId="1" pageNumber="54" type="nomenclature">
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<paragraph pageId="1" pageNumber="54">
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<taxonomicName LSID="urn:lsid:zoobank.org:act:5E679036-2477-4485-BAD0-6F6D452D2288" class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="1" pageNumber="54" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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<taxonomicNameLabel pageId="1" pageNumber="54">sp. n.</taxonomicNameLabel>
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Figs 28
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="material examined">
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<paragraph pageId="1" pageNumber="54">Material examined.</paragraph>
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<paragraph pageId="1" pageNumber="54">
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Collected by R. Vonk and Mr. Sumadijo, 9 November 2009.Gura Ici islands, north beach of Pulau Lelei, thick coral rubble bar at waterline bordering shallow reef flat (stn. 09-60;
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<geoCoordinate direction="north" orientation="latitude" precision="1" value="0.027400002">0°01'38.64"N</geoCoordinate>
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,
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<geoCoordinate direction="east" orientation="longitude" precision="1" value="127.24403">127°14'38.53"E</geoCoordinate>
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); B-Rh pump placed on slope of coral bar, pipe 50 cm depth, 50 l filtered. Holotype: Adult male (with penile papillae) 2.65 mm retaining all limbs except U3, completely dissected and mounted on single slide [ZMA, amph. 206076]. Paratypes: five adult males of 2.53, 2.54, 2.55, 2.57 and 2.63 mm; two brooding females (oostegites developed, setose) 2.60 and 2.98 mm; two juveniles 1.79 and 1.87 mm. All in single vial [ZMA, amph. 206075].
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</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="diagnosis">
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<paragraph pageId="1" pageNumber="54">Diagnosis.</paragraph>
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<paragraph pageId="1" pageNumber="54">Male G2 palm margin only slightly excavated, devoid of mid-palmar strong robust setae; carpus broader-than-long. Uropod III exp2 longer than exp1; endopod elongated, more than 50% length of exp1. Protopod of U1 with one basofacial robust seta. Distomedial angle of U2 protopod provided with transverse comb of 4 robust setae. Telson with two lateral and one distal robust setae. Posteroventral angle of epimeral plate III pointed but weakly produced. Armature (robust setae) on ventral margins of epimeral plates as 1-(2 or 3)-3. Coxal endite (= inner plate) of maxillule provided with 6 setae; basal endite (= outer plate) with 9 robust setae. Oblique row on inner plate of maxilla composed of 4 setae. Basal endite (= inner plate) of maxilliped provided with three robust setae; ischial endite (= outer plate) with 4. Basis of P7 weakly expanded, with sub-parallel anterior and posterior margins. Pleopod II sexually-dimorphic.</paragraph>
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</subSubSection>
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<subSubSection pageId="1" pageNumber="54" type="etymology">
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<paragraph pageId="1" pageNumber="54">Etymology.</paragraph>
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<paragraph pageId="1" pageNumber="54">Species name after the 19th century British naturalist Alfred R. Wallace, who was based in Ternate during his explorations of the Moluccas.</paragraph>
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</subSubSection>
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<subSubSection lastPageId="6" lastPageNumber="59" pageId="1" pageNumber="54" type="description">
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<paragraph pageId="1" pageNumber="54">Description.</paragraph>
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<paragraph pageId="1" pageNumber="54">Adult male. Eyeless. Body (Fig. 2A) elongate and slender, unpigmented, somites devoid of relevant armature or sculpturing except for robust seta present on posteroventral angle of urosomite III (Fig. 8B). Head lacking rostrum; lateral lobes evenly rounded; antennal sinus hardly indicated, unnotched. Pereiopodal coxae narrow, hardly overlapping. Epimeral plates (Fig. 8A) with acute posteroventral angles, that of epimeral plate III more produced than rest; armature of ventral margin of plates (flagellate robust setae) as 1-3-3 or 1-2-3; posterior margin of plates each with single simple seta implanted adjacent to posterodistal angle.</paragraph>
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<paragraph lastPageId="2" lastPageNumber="55" pageId="1" pageNumber="54">
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Antennule short, about half as long as body length (Fig. 2A). Peduncle segments relative length as 100: 77: 43; proximal segment provided with stout flagellate robust
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<pageBreakToken pageId="2" pageNumber="55" start="start">seta</pageBreakToken>
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subdistally on ventromedial margin (Fig. 2B, C). Main flagellum about as long as peduncle, with armature on medial and lateral margins exactly as depicted; armature of two most proximal articles and terminal article differing from rest as figured. Accessory flagellum 2-articulate, overreaching distal margin of proximal article of main flagellum.
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</paragraph>
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<paragraph pageId="2" pageNumber="55">Antenna (Fig. 2A, D) shorter, about three-quarters length of antennule. Gland cone slender, straight, pointing anteriorly; relative length of three distal segments of peduncle as 48: 100: 88. Flagellum short, slightly longer than distal segment of peduncle.</paragraph>
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<paragraph pageId="2" pageNumber="55">Labrum trapezoidal. Paragnaths (Fig. 8D) with distinct, well developed inner lobes; outer lobes each with 4 stout tricuspidate setae on tip.</paragraph>
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<paragraph lastPageId="3" lastPageNumber="56" pageId="2" pageNumber="55">
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Left mandible (Fig. 3A) incisor with 5 rounded teeth, lacinia with 4 teeth; spine row composed of 7 elements; molar columnar, molar seta shorter than right mandible coun
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<pageBreakToken pageId="3" pageNumber="56" start="start">terpart</pageBreakToken>
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. Palp 3-segmented, distal segment shorter than middle segment, provided with 6 stiff simple setae along medial margin but not in a regular row; middle segment with three flagellate stiff setae on medial margin. Right mandible (Fig. 3B) differing from left counterpart in almost quadrate lacinia with distal margin finely denticulated except for two larger rounded denticles at one angle; spine row comprising 5+3 elements.
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</paragraph>
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<paragraph pageId="3" pageNumber="56">Maxillules (Fig. 3C) symmetrical, coxal endite (= inner plate) with 4+2 marginal setae; basal endite (= outer plate) with 9 robust setae distally, 4 of which bicuspid and placed conforming an inner row, rest denticulated and conforming outer row. Endopod (= palp) faintly 2-segmented, distal segment slightly expanded distally, with 4 broad, short denticulated robust setae on distal margin, and 1-2 denticulated setae subdistally on outer surface of segment.</paragraph>
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<paragraph pageId="3" pageNumber="56">Maxilla (Fig. 3D) inner plate with oblique row of 4 plumose setae; distal margin with 4 pinnate setae and 4 simple setae with blunt tip provided with pore; two pinnate setae subdistally on medial margin of plate as figured. Outer plate distal margin with 10 simple setae with blunt tip, two shorter, ordinary simple setae, plus seta with a few pinnules proximally as figured.</paragraph>
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<paragraph pageId="3" pageNumber="56">Maxilliped (Fig. 3E) basal endite (= inner plate) subrectangular, straight distal margin provided with three short subtriangular robust setae, two of which smooth, third with two rounded denticles; other armature on endite comprising subterminal oblique row of 5 pinnate setae on anterior surface, and three simple setae subterminally on posterior surface. Ischial endite (= outer plate) with convex outer margin; straight inner margin with 6 simple setae with blunt tip; distal margin oblique, with 4 pectinate robust setae. Other relevant armature on endite comprising submarginal row of 4 simple setae with blunt tip running subparallel to inner margin on posterior surface. Merus-dactylus (= palp) as in Fig. 3E, F, with claw (= dactylus+unguis) as long as propodus.</paragraph>
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<paragraph pageId="3" pageNumber="56">Coxal gills on gnathopod II and pereiopods III-VI (Fig. 2A); gills II (Fig. 4D) and III-IV (Fig. 5B) each longer than basis of corresponding pereiopod, gills V-VI (Fig. 6A, B) shorter than basis; gill VI reduced. Gill II narrow, sausage-shaped, rest ovoid; all provided with short stalk.</paragraph>
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<paragraph pageId="3" pageNumber="56">Gnathopod I (Fig. 4A-C) propodus clearly longer than carpus, elongate (1.9 times as long as broad), with parallel anterior and posterior (= lateral and medial) margins. Palm margin oblique, convex, finely serrated, with submarginal row of about 10 short flagellate robust setae along medial side. Palm angle not produced, ordinarily with two unequal flagellate robust setae, but extraordinarily with 3-4 (Fig. 4C). Coxa (Fig. 4B) slightly broader than long, with evenly rounded anterior margin; posterior margin slightly excavated.</paragraph>
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<paragraph pageId="3" pageNumber="56">Gnathopod II (Fig. 4D) propodus elongate (1.9 times as long as broad) with subparallel anterior and posterior margins; palm angle hardly produced, with two unequal flagellate robust setae; palm margin (Fig. 4E) finely serrated, half adjacent to palm angle hardly excavated, with submarginal row of ca. 9 short flagellate robust setae along medial side. Merus posterodistal angle slightly produced, but lacking pointed tip. Carpus triangular, short, less than half length of propodus.</paragraph>
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<paragraph pageId="4" pageNumber="57">
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<pageBreakToken pageId="4" pageNumber="57" start="start">Pereiopods</pageBreakToken>
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III-IV (Fig. 5A, B) subsimilar, with coxae much broader than long, subrectangular, expanded anteriorly into evenly rounded lobe and posterior margin not excavated, straight.
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</paragraph>
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<paragraph pageId="5" pageNumber="58">
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<pageBreakToken pageId="5" pageNumber="58" start="start">Pereiopods</pageBreakToken>
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V-VII unequal in length, P5 (Fig. 6A) shortest, P6 (Fig. 6B) longer than P7 (Fig. 6C). Basis of each pereiopod only moderately expanded, with subparallel margins and with posterodistal angle distinct but not overhanging. Nail (dactylus + unguis) of P6 more slender and clearly longer than those of P5 and P7. Unguis reduced in all limbs. Coxa V with expanded, evenly rounded anterior lobe.
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</paragraph>
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<paragraph pageId="5" pageNumber="58">Pleopods progressively shorter towards posterior, biramous, rami multi-articulate, apparently similar at first sight, but differing remarkably in minute details as follows. Protopods each with two retinacles, and with flagellate robust seta placed proximo-laterally on anterior surface of segment (pleopods I-II; Fig. 7A, B), or on lateral margin (pleopod III; Fig. 7D). Protopod of pleopod I devoid of any other armature; protopod of pleopod II with seta on anterodistal margin (Fig. 7B, C); protopod of pleopod III with seta on distolateral angle (Fig. 7D, E). Short, subtriangular process protruding posterodistally on each protopod, those on pleopods I-II with smooth surface (Fig. 7A, C), that on pleopod III microspinulate (Fig. 7E). Proximal article of endopod of pleopod I with one reduced smooth seta proximally on anterior surface (Fig. 7A); seta absent from rest of pleopods (Fig. 7B, D); proximal seta on medial margin of article apparently unicuspid (Fig. 7A), vs. seta bifid on pleopods II-III (Fig. 7C, E). Proximal article of exopod of pleopod II sexually-dimorphic: proximal two-thirds of medial margin with row of short, curved denticles with rounded tip, and row of ordinary setules along distal third of margin (Fig. 7B, C).</paragraph>
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<paragraph pageId="5" pageNumber="58">
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Uropods I-II strongly dissimilar in length (Fig. 8B), biramous, exopod shorter than endopod, and with margins of both protopod and rami provided with flagellate robust setae. Uropod I (Fig. 8C) protopod much longer than exopod, provided with stout basofacial robust seta and with pair of robust setae on each posterodistal angle, medial pair appreciably longer than lateral counterpart. Posterolateral margin of segment provided with 4 short robust setae, posteromedial margin with three. Exopod with 5 distal robust setae and with robust seta on posterolateral margin; endopod with 4 distal setae and with robust seta about midway on both margins, aside of reduced simple seta on anteroproximal surface of segment. Uropod II (Fig. 6D) protopod about as long as exopod, with one robust seta on distolateral angle and with transverse row of 4 robust setae on distomedial angle (see Fig. 8B). Margins of segment each with single robust seta about midway. Exopod with 4 distal robust setae and robust seta about midway of posterolateral margin; endopod with 5 distal robust setae and two robust setae along posteromedial margin. Lateral margin of exopod and medial margin of endopod each minutely serrated (Fig. 6D). Uropod III (Figs 2A; 5C) strongly elongated, all segments somewhat flattened, foliaceous, provided with numerous flagellate robust setae as figured. Protopod short; proximal segment of exopod about 2.2 times as long as protopod, distal segment exceedingly longer (1.5
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<normalizedToken originalValue="×">x</normalizedToken>
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) than proximal segment. Endopod elongate, pointed, much longer than protopod and attaining about 57% length of proximal exopodal segment; one robust seta on tip.
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</paragraph>
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<paragraph lastPageId="6" lastPageNumber="59" pageId="5" pageNumber="58">
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Telson (Fig. 6E) cleft almost until base, slightly longer than broad, tip of each lobe shallowly excavated, provided with simple seta. Three flagellate robust setae on each lobe, one placed subdistally while other two proximally on lateral margin as figured
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<pageBreakToken pageId="6" pageNumber="59" start="start">.</pageBreakToken>
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One penicillate seta disposed adjacent to one of lateral robust setae as in Figs 8B and 6E. Pair of long setae on dorsal surface of each lobe as figured.
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</paragraph>
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<paragraph pageId="6" pageNumber="59">Adult female. As male except for gnathopod II, which displays more elongated carpus and evenly convex palm margin of protopod (compare Figs 4D, E and 5D). In addition, proximal article of exopod of pleopod II unmodified. Oostegites present on gnatopod II and pereiopods III-V, linear, provided with few sparsely set marginal setae (Fig. 5D). Condition of uropod III unresolved since none of two females collected retained it.</paragraph>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 2.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male paratype 2.53 mm, P5-P7 wanting. A body, lateral B left antennule, lateral C same showing medial armature D right antenna, lateral. Arrows pointing at serially-homologous pairs of articles of main flagellum of antennule.
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 3.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male holotype. A left mandible B right mandible C maxillule D maxilla E maxilliped, posterior F inset of distal segments of palp of latter, anterior.
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 4.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male holotype. A right gnathopod I, medial B inset of coxa, lateral C palm, medial D left gnathopod II, medial; palm, medial. Notice that C and E are not at same scale.
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 5.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. nov., male holotype. A left pereiopod III with coxal gill omitted, lateral B right pereiopod IV, lateral C right uropod III, dorsal D left gnathopod II of female paratype 2.98 mm showing coxal gill and oostegite, coxal plate omitted, medial. [Scale bars: 0.25 mm (C); 0.1 mm (A, B, D)]
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 6.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male holotype. A right pereiopod V, lateral B left pereiopod VI, lateral C left pereiopod VII, lateral D right uropod II, posterior E telson, dorsal.
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 7.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male holotype. A left pleopod I, posterior B left pleopod II with distal portion of endopod omitted, endopod unnaturally bent to expose medial margin of proximal article of exopod, anterior view C detail of latter, anterior D left pleopod III, anterior E detail of distal portion of protopod of right pleopod III, posterior. Arrows pointing at armature elements of protopod.
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</paragraph>
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</caption>
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<caption pageId="6" pageNumber="59">
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<paragraph pageId="6" pageNumber="59">
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Figure 8.
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<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
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sp. n., male holotype. A left epimeral plates, lateral B urosome, lateral (uropod III wanting) C left uropod I, posterior D paragnaths.
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</paragraph>
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</caption>
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</subSubSection>
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<subSubSection lastPageId="9" lastPageNumber="62" pageId="6" pageNumber="59" type="remarks">
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<paragraph pageId="6" pageNumber="59">Remarks.</paragraph>
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<paragraph pageId="6" pageNumber="59">
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The combined display of a basic gammaridean body plan, linear oostegites, antennae without calceoli, no sternal gills, G1 smaller than G2, both lacking integumentary rugosities, G1 of melitoid type, dispariramous uropod III with a reduced endopod and a 2-segmented exopod with both segments highly elongated and about the same length, and paragnaths with distinct inner lobes, relates the new taxon from Indonesia with a reduced cluster of melitid genera of mostly stygobytic habits known as the Eriopisa-group. The discrimination between several of the components in this complex proved to be controversial (
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<bibRefCitation author="Karaman, GS" journalOrPublisher="Proceedings of the biological Society of Washington" pageId="10" pageNumber="63" pagination="106 - 165" title="Classificatory revisions in gammaridean Amphipoda (Crustacea), I." volume="92" year="1979">Karaman and Barnard 1979</bibRefCitation>
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;
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<bibRefCitation author="Stock, JH" journalOrPublisher="Bijdragen tot de Dierkunde" pageId="10" pageNumber="63" pagination="375 - 386" title="A new cave amphipod (Crustacea) from Curacao: Psammogammarus caesicolus sp. n." volume="50" year="1980">Stock 1980</bibRefCitation>
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;
|
||
<bibRefCitation author="Karaman, GS" journalOrPublisher="Poljoprivreda i Sumarstvo" pageId="10" pageNumber="63" pagination="39 - 72" title="Revision of Eriopisa-complex of genera (Gammaridea) (Contribution to the knowledge of the Amphipoda 139)." volume="30" year="1984">Karaman 1984</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Stock, JH" journalOrPublisher="Stygologia" pageId="10" pageNumber="63" pagination="264 - 277" title="Psammogammarus initialis sp. n., a new mediolittoral interstitial amphipod crustacean from Tenerife." volume="3" year="1987">
|
||
Stock and
|
||
<normalizedToken originalValue="Sánchez">Sanchez</normalizedToken>
|
||
1987
|
||
</bibRefCitation>
|
||
), holding currently
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Flagitopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Flagitopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Flagitopisa</taxonomicName>
|
||
,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Nedsia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nedsia" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Nedsia</taxonomicName>
|
||
,
|
||
<taxonomicName class="Malacostraca" family="Melitidae" genus="Norcapensis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Norcapensis" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Norcapensis</taxonomicName>
|
||
,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Tunisopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Tunisopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Tunisopisa</taxonomicName>
|
||
and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Victoriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Victoriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Victoriopisa</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<paragraph pageId="6" pageNumber="59">
|
||
The new taxon differs markedly from
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Victoriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Victoriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Victoriopisa</taxonomicName>
|
||
Karaman & Barnard, 1979, a genus from coastal lagoons and marine shallow waters comprising 9 species, in displaying the proximal articles of the antennary flagellum not fused; the ventral margin of epimeral plate II devoid of a row of long setae; the P7 basis not broadly expanded, similar to P6; and the propodus of G1 longer than carpus (vs. carpus equal or longer than propodus in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Victoriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Victoriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Victoriopisa</taxonomicName>
|
||
) (see
|
||
<bibRefCitation author="Lowry, JK" journalOrPublisher="Records of the Australian Museum" pageId="10" pageNumber="63" pagination="237 - 302" title="New and little-known melitid amphipods from Australian Waters (Crustacea: Amphipoda: Melitidae)." volume="57" year="2005">Lowry and Springthorpe 2005</bibRefCitation>
|
||
and references therein;
|
||
<bibRefCitation author="Ortiz, M" journalOrPublisher="Revista de Investigaciones Marinas" pageId="10" pageNumber="63" pagination="233 - 237" title="Una nueva especie de anfipodo del complejo Eriopisa (Amphipoda, Gammaridea), de aguas cubanas." volume="10" year="1989">Ortiz and Lalana 1989</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Lim, JHC" journalOrPublisher="Zootaxa" pageId="10" pageNumber="63" pagination="23 - 39" title="Melitoid amhipods of the genera Ceradocus Costa, 1853 and Victoriopisa Karaman and Barnard, 1979 (Crustacea: Amphipoda: Maeridae) from the South China Sea, Malaysia." volume="2348" year="2010">Lim et al. 2010</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="6" pageNumber="59">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
Stebbing, 1890, comprising two species, viz.
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa elongata" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="elongata">Eriopisa elongata</taxonomicName>
|
||
(Bruzelius, 1859) from the deep Atlanto-Mediterranean and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa incisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="incisa">Eriopisa incisa</taxonomicName>
|
||
McKinney, Kalke and Holland 1978 from shallow muddy bottoms on the Gulf of Mexico, differs in the notched head lobe; the forwardly pointed coxal plate of G1; the broadly expanded basis of P7, dissimilar to P6; the carpus of G1 as long as or longer than propodus; and the epimeral plate II bearing a row of long setae along ventral margin (
|
||
<bibRefCitation author="McKinney, LD" journalOrPublisher="Contributions in Marine Science" pageId="10" pageNumber="63" pagination="133 - 159" title="New species of amphipods from the western Gulf of Mexico." volume="21" year="1978">McKinney et al. 1978</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Lincoln, RJ" journalOrPublisher="British Museum (Natural History), London" pageId="10" pageNumber="63" title="British marine Amphipoda: Gammaridea" year="1979">Lincoln 1979</bibRefCitation>
|
||
). Two taxa currently included in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
, viz.
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa inaequicaudata" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="inaequicaudata">Eriopisa inaequicaudata</taxonomicName>
|
||
Ledoyer, 1982 from the Tulear reef in Madagascar and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa mochimae" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="species" species="mochimae">Eriopisa mochimae</taxonomicName>
|
||
van der Ham & Vonk, 2003 from a sandy beach in Venezuela and coral rubber bars in
|
||
<normalizedToken originalValue="Curaçao">Curacao</normalizedToken>
|
||
, do not display the diagnostic forwardly pointed coxa I, notched head lobe, setose ventral margin of epimeral plate II, and the P7 basis is similar to P6; they should not be considered as members of the genus, nor even of the
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
-group since their U3 exp2 is hardly elongated (
|
||
<bibRefCitation author="Ledoyer, M" journalOrPublisher="Faune de Madagascar" pageId="10" pageNumber="63" pagination="1 - 598" title="Crustaces amphipodes gammariens. Familles des Acanthonotozomatidae a Gammaridae." volume="59" year="1982">Ledoyer 1982</bibRefCitation>
|
||
;
|
||
<bibRefCitation author="Van Der Ham, JL" journalOrPublisher="Journal of Natural History" pageId="10" pageNumber="63" pagination="779 - 796" title="A phylogenetic analysis of the Eriopisa complex (Crustacea: Amphipoda: Melitidae) and a new species from beach interstitial in Venezuela." volume="37" year="2003">van der Ham and Vonk 2003</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="6" pageNumber="59">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Flagitopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Flagitopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Flagitopisa</taxonomicName>
|
||
Karaman, 1984, comprising two species from wells and river alluvia in the Philippines, differs in the presence of sternal gills on the first pleonite; the uniarticulate condition of the antennulary accessory flagellum; the high number of robust setae on the basal endite of maxilliped (11 vs. 3 in the new taxon, and up to 6 in the rest of taxa of the
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="6" pageNumber="59" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
-group); and the G1 carpus, which is longer than propodus (
|
||
<bibRefCitation author="Sawicki, TR" journalOrPublisher="Raffles Bulletin of Zoology" pageId="10" pageNumber="63" pagination="59 - 68" title="Redescription of the subterranean amphipod crustacean Flagitopisa philippensis (Hadzioidea: Melitidae), with notes on its unique morphology and clarification of the taxonomic status of Psammogammarus fluviatilis." volume="53" year="2005">Sawicki et al. 2005</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Nedsia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nedsia" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">
|
||
<pageBreakToken pageId="7" pageNumber="60" start="start">Nedsia</pageBreakToken>
|
||
</taxonomicName>
|
||
Barnard & Williams, 1995, including 11 species from Australian inland groundwaters, displays a G1 carpus longer than propodus; a broadly expanded, foliaceous U3 exopod; and a 2-segmented mandibular palp (see
|
||
<bibRefCitation author="Bradbury, JH" journalOrPublisher="Records of the Western Australian Museum" pageId="10" pageNumber="63" pagination="83 - 103" title="Melitid amphipods from Barrow Island, Western Australia Part 2 - recent discoveries." volume="21" year="2002">Bradbury 2002</bibRefCitation>
|
||
and references therein).
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
<taxonomicName class="Malacostraca" family="Melitidae" genus="Norcapensis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Norcapensis" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Norcapensis</taxonomicName>
|
||
Bradbury & Williams, 1997, a monotypic genus from subterranean waters of W Australia, differs in the fusion of the proximal articles of the antennal flagellum; the carpus of G1 longer than propodus; and the huge G2 propodus, with a short posterior margin and a strongly oblique palm margin.
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Tunisopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Tunisopisa" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Tunisopisa</taxonomicName>
|
||
Stock, 1980, a monotypic genus from wells in Tunisia, displays a non-elongated exp2 of U3 but is traditionally included in the
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
-group. This taxon shows a presumed unsegmented maxillulary endopod; a broadly expanded, foliaceous U3 exopod; a G1 propodus longer than carpus; and a peculiar palm of G1, provided with a series of transverse integumentary ridges (
|
||
<bibRefCitation author="Gauthier, H" journalOrPublisher="Bulletin de la Societe d'Histoire Naturelle du l'Afrique du Nord" pageId="10" pageNumber="63" pagination="133 - 143" title="Eriopisa seurati, nouvel amphipode du Sud-tunisien." volume="27" year="1936">Gauthier 1936</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
The new Indonesian species is assigned to
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
after its P7 basis, similar to P6, and the proportions of the two distal segments of the mandibular palp, with segment 3 much shorter than segment 2. Only some species in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Nedsia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nedsia" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Nedsia</taxonomicName>
|
||
among members of the
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Eriopisa" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Eriopisa" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Eriopisa</taxonomicName>
|
||
-group show a slender or weakly broadened basis of P7 approaching the nearly linear basis of P7 of the new taxon, but all
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Nedsia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Nedsia" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Nedsia</taxonomicName>
|
||
members display a 2-segmented mandibular palp.
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
|
||
sp. n. differs at first glance from a highly distinctive group of three species of non-interstitial habits, inhabitants of anchialine caves and wells, namely
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus burri" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="burri">Psammogammarus burri</taxonomicName>
|
||
Jaume & Garcia, 1992 from the Balearic Is.,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus longidactylus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="longidactylus">Psammogammarus longidactylus</taxonomicName>
|
||
Vonk & Stock, 1987 from Bonaire (Netherlands Antilles), and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus longiramus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="longiramus">Psammogammarus longiramus</taxonomicName>
|
||
(Stock & Nijssen, 1965) from Entedebir Is. (Red Sea). This cluster is characterised by the common display of a male G2 with non-excavated, evenly convex palm margin and an elongated, longer-than-broad carpus.
|
||
</paragraph>
|
||
<paragraph pageId="7" pageNumber="60">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus gracilis" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="gracilis">Psammogammarus gracilis</taxonomicName>
|
||
(Ruffo & Schiecke, 1975), from the shallow infralittoral interstitial medium of Malta (Mediterranean), shows a highly characteristic bisinusoid conformation of the male G2 palm margin. This feature differs markedly from the condition displayed in the rest of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
, including the new species, where the palm margin is either excavated or evenly convex.
|
||
</paragraph>
|
||
<paragraph lastPageId="8" lastPageNumber="61" pageId="7" pageNumber="60">
|
||
A third cluster of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
, of interstitial habits, displays a male G2 palm margin strongly excavated, namely:
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus coecus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="coecus">Psammogammarus coecus</taxonomicName>
|
||
S. Karaman, 1955 from the western Mediterranean and Adriatic shallow infralittoral;
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus garthi" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="garthi">Psammogammarus garthi</taxonomicName>
|
||
(Barnard, 1952) from a tidal pool at Baja California (Mexico);
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus initialis" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="initialis">Psammogammarus initialis</taxonomicName>
|
||
Stock &
|
||
<normalizedToken originalValue="Sánchez">Sanchez</normalizedToken>
|
||
, 1987 and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus stocki" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="stocki">Psammogammarus stocki</taxonomicName>
|
||
Vonk, 1990, both from beaches and tidal pools at Tenerife (Canary Is.);
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus mawatarii" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="mawatarii">Psammogammarus mawatarii</taxonomicName>
|
||
Tomikawa, Kakui and Yamasaki 2010 from a tidal pool in southern Japan; and
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus spinosus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="spinosus">Psammogammarus spinosus</taxonomicName>
|
||
Stock & Vonk, 1992 from a beach at the Cape Verde Islands. Additional remarkable differences between these and other
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
species vs.
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
|
||
sp. n. are shown in Table 1. Intraspecific variation has been accounted for. For instance
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus burri" order="Amphipoda" pageId="7" pageNumber="60" phylum="Arthropoda" rank="species" species="burri">Psammogammarus burri</taxonomicName>
|
||
possesses the rather high number of 19 setae on the coxal endite (=outer plate) of the maxillule (character 13, Table 1). However, this number is fixed within the other 6 specimens used for this study. Another research that focussed on variation within b
|
||
<pageBreakToken pageId="8" pageNumber="61" start="start">ogidiellid</pageBreakToken>
|
||
amphipods also confirmed only small variation is present in this feature - in one case out of seven 6 spines present instead of 7 (
|
||
<bibRefCitation author="Vonk, R" journalOrPublisher="Crustaceana" pageId="10" pageNumber="63" pagination="817 - 835" title="The groundwater amphipod Bogidiella turcica sp. n. and other bogidiellids (Malacostraca, Amphipoda) in Southwest Turkey." volume="72" year="1999">Vonk et al. 1999</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="8" pageNumber="61">
|
||
Only
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
Stock, 1980 from
|
||
<normalizedToken originalValue="Curaçao">Curacao</normalizedToken>
|
||
and Bonaire displays a shallowly excavated male G2 palm margin approaching the condition found in the new species. This species shares also with the new taxon the display of a reduced armature on both the coxal endite of the maxillule and the inner plate of the maxilla, a comb of 4 robust setae on the distomedial angle of U2 protopod, an elongate U3 endopod, and a robust seta on tip of telson (see Table 1). But they differ markedly in the exp2 of U3, which is shorter than exp1 in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
vs. longer in the new species; in the presence of 2-3 basofacial spines on the protopod of U1 in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
vs. only one in the new species; in the armature of epimeral plates, devoid of robust setae in
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
vs. a 1-(2 or 3)-3 arrangement in the new species; and in the armature of palm angle of G2 in both sexes, with 4 robust setae in male and three in female
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
, vs. two robust setae in both sexes in the new species.
|
||
</paragraph>
|
||
<paragraph lastPageId="9" lastPageNumber="62" pageId="8" pageNumber="61">
|
||
Two species of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
are known only from a single female, but their morphology enables an easy separation from the new taxon. Thus,
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus scopulorum" order="Amphipoda" pageId="8" pageNumber="61" phylum="Arthropoda" rank="species" species="scopulorum">Psammogammarus scopulorum</taxonomicName>
|
||
Stock, 1983, a coarse sand bar inhabitant of Los Roques archipelago in Venezuela differs markedly from the new species in the telson armature, devoid of lateral robust setae; the reduced marginal armature on both protopod and rami of U1 and U2; the comparatively longer U3 endopod (attaining 96% length of proximal segment of exopod, vs. 57% in the new species); the relative length of the U3 exopodal segments, with exp1 longer than
|
||
<pageBreakToken pageId="9" pageNumber="62" start="start">exp</pageBreakToken>
|
||
2 (vs. the reverse in the new species); and the armature of epimeral plates, with 0-1-1 robust setae compared to 1-(2 or 3-3) in the new species (see Table 1;
|
||
<bibRefCitation author="Stock, JH" journalOrPublisher="Bijdragen tot de Dierkunde" pageId="10" pageNumber="63" pagination="103 - 108" title="A new species of Psammogammarus (Crustacea, Amphipoda) from the Roques archipelago, Venezuela." volume="53" year="1983">Stock 1983</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph pageId="9" pageNumber="62">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus bluefieldensis" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="bluefieldensis">Psammogammarus bluefieldensis</taxonomicName>
|
||
Ortiz, Lalana &
|
||
<normalizedToken originalValue="Beltrán">Beltran</normalizedToken>
|
||
, 1993, from shallow muddy bottoms of the Caribbean coast of Nicaragua, differs from the rest of members of the genus in the display of a comparatively shallowly excavated telson (cleft only to almost midway compared to almost at base in the rest of species) and a 3-articulate accessory flagellum of antennule. In addition, it differs from the new species in the U1 and U2 rami, devoid of marginal armature; the shorter U3 endopod (attaining only 34% length of exp1, vs. 57% in the new species); and the U3 exp2, much shorter than exp1 (63% length of exp1, vs. exp2 longer than exp1 in the new species), among other distinctive features (see Table 1).
|
||
</paragraph>
|
||
<paragraph pageId="9" pageNumber="62">
|
||
The new species from Indonesia displays a faint sexual dimorphism on pleopod II, where the male displays a rake conformed of short and blunt curved spinules along the medial margin of the proximal article of the exopod (Fig. 7B, C).
|
||
<bibRefCitation author="Vonk, R" journalOrPublisher="Bijdragen tot de Dierkunde" pageId="10" pageNumber="63" pagination="271 - 276" title="Psammogammarus stocki sp. n. (Crustacea, Amphipoda, Melitidae) from beach interstitial on Tenerife." volume="60" year="1990">Vonk (1990</bibRefCitation>
|
||
: 274 and fig. 1f) also noticed the presence of a unusual swelling placed in exactly the same position in the male pleopod II of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus stocki" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="stocki">Psammogammarus stocki</taxonomicName>
|
||
Vonk, 1990. Furthermore, Stock and Vonk (1987: 246) stated "(male) pleopods normally segmented, not transformed"in the description of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus longidactylus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="longidactylus">Psammogammarus longidactylus</taxonomicName>
|
||
, and the same holds for
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
Stock, 1980 (
|
||
<bibRefCitation author="Stock, JH" journalOrPublisher="Bijdragen tot de Dierkunde" pageId="10" pageNumber="63" pagination="375 - 386" title="A new cave amphipod (Crustacea) from Curacao: Psammogammarus caesicolus sp. n." volume="50" year="1980">Stock 1980</bibRefCitation>
|
||
: 377). We have checked directly for the condition of pleopod II in at least two species of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
of which we had material available for study.
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus burri" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="burri">Psammogammarus burri</taxonomicName>
|
||
Jaume & Garcia, 1993, a member of the cluster of species characterised by the display of a male G2 with an evenly convex, non-excavated palm margin and an elongated carpus, displays a non-sexually dimorphic pleopod, as stated in the original description. Likewise, a single male specimen of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
cf. caecus -belonging to the cluster that displays a male G2 with a strongly excavated palm and a short, broader-than-long
|
||
<normalizedToken originalValue="carpus–">carpus-</normalizedToken>
|
||
showed an unmodified pleopod II. This specimen was gathered with the other two at the Balearic Sea slope (552-1263 m depth) and represents the first record of the genus in deep waters (
|
||
<bibRefCitation author="Cartes, JE" journalOrPublisher="Journal of Natural History" pageId="10" pageNumber="63" pagination="1133 - 1158" title="Deep-water amphipods from the Catalan Sea slope (western Mediterranean): Bathymetric distribution, assemblage composition and biological characteristics." volume="33" year="1999">Cartes and Sorbe 1999</bibRefCitation>
|
||
). We thus discard that sexual dimorphism in pleopod II could be relevant in the taxonomic refinement of the genus, its value remaining limited to a mere species-level autapomorphic trait.
|
||
</paragraph>
|
||
<caption ID-Table-UUID="7E198527E038D821E9AE3B20E5608EF6" httpUri="http://table.plazi.org/id/7E198527E038D821E9AE3B20E5608EF6" pageId="9" pageNumber="62">
|
||
<paragraph pageId="9" pageNumber="62">
|
||
Table 1. Main diagnostic features of
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="genus">Psammogammarus</taxonomicName>
|
||
species.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph pageId="9" pageNumber="62">
|
||
<table pageId="9" pageNumber="62">
|
||
<tr pageId="9" pageNumber="62">
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus wallacei" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="wallacei">Psammogammarus wallacei</taxonomicName>
|
||
sp. n.
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus bluefieldensis" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="bluefieldensis">Psammogammarus bluefieldensis</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus burri" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="burri">Psammogammarus burri</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus coecus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="coecus">Psammogammarus coecus</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus caesicolus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="caesicolus">Psammogammarus caesicolus</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus garthi" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="garthi">Psammogammarus garthi</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus gracilis" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="gracilis">Psammogammarus gracilis</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus initialis" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="initialis">Psammogammarus initialis</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus longidactylus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="longidactylus">Psammogammarus longidactylus</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus longiramus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="longiramus">Psammogammarus longiramus</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus mawatarii" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="mawatarii">Psammogammarus mawatarii</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus scopulorum" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="scopulorum">Psammogammarus scopulorum</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus spinosus" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="spinosus">Psammogammarus spinosus</taxonomicName>
|
||
</th>
|
||
<th colspan="1" pageId="9" pageNumber="62" rowspan="1">
|
||
<taxonomicName class="Malacostraca" family="Eriopisidae" genus="Psammogammarus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Psammogammarus stocki" order="Amphipoda" pageId="9" pageNumber="62" phylum="Arthropoda" rank="species" species="stocki">Psammogammarus stocki</taxonomicName>
|
||
</th>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |