347 lines
26 KiB
XML
347 lines
26 KiB
XML
<document ID-DOI="http://dx.doi.org/10.3897/zookeys.824.25544" ID-GBIF-Dataset="90489c88-f1a2-4035-ac9f-c8160aae0cbf" ID-PMC="PMC6384282" ID-Pensoft-Pub="1313-2970-824-87" ID-PubMed="30804696" ID-ZBK="549FF67544A742FEADF974E318EE0AA5" ModsDocAuthor="" ModsDocDate="2019" ModsDocID="1313-2970-824-87" ModsDocOrigin="ZooKeys 824" ModsDocTitle="Two new enchytraeid species from Jeju Island, Korea (Annelida, Clitellata)" checkinTime="1551186942804" checkinUser="pensoft" docAuthor="Dozsa-Farkas, Klara, Felfoeldi, Tamas, Nagy, Hajnalka & Hong, Yong" docDate="2019" docId="185DF220987A83B96D56A19755B21B7A" docLanguage="en" docName="ZooKeys 824: 87-108" docOrigin="ZooKeys 824" docSource="http://dx.doi.org/10.3897/zookeys.824.25544" docTitle="Achaeta multisacculata Dozsa-Farkas, Felfoeldi, Nagy & Hong, 2019, sp. n." docType="treatment" docUuid="BB0641AE-3012-4D55-B23E-455AF235ED33" docUuidSource="ZooBank" docVersion="5" lastPageNumber="92" masterDocId="6E02FFB9FF84FFD42962FFD33077CD57" masterDocTitle="Two new enchytraeid species from Jeju Island, Korea (Annelida, Clitellata)" masterLastPageNumber="108" masterPageNumber="87" pageNumber="89" updateTime="1668166933288" updateUser="ExternalLinkService">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Two new enchytraeid species from Jeju Island, Korea (Annelida, Clitellata)</mods:title>
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</mods:titleInfo>
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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>Dozsa-Farkas, Klara</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>Felfoeldi, Tamas</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>Nagy, Hajnalka</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>Hong, Yong</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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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>2019</mods:date>
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<mods:detail type="volume">
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<mods:number>824</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>87</mods:start>
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<mods:end>108</mods:end>
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</mods:extent>
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</mods:part>
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</mods:relatedItem>
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<mods:location>
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<mods:url>http://dx.doi.org/10.3897/zookeys.824.25544</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.824.25544</mods:identifier>
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<mods:identifier type="Pensoft-Pub">1313-2970-824-87</mods:identifier>
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<mods:identifier type="ZBK">549FF67544A742FEADF974E318EE0AA5</mods:identifier>
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<mods:identifier type="ZooBank">549FF67544A742FEADF974E318EE0AA5</mods:identifier>
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</mods:mods>
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<treatment ID-GBIF-Taxon="154125708" LSID="urn:lsid:zoobank.org:act:BB0641AE-3012-4D55-B23E-455AF235ED33" httpUri="http://treatment.plazi.org/id/185DF220987A83B96D56A19755B21B7A" lastPageId="5" lastPageNumber="92" pageId="2" pageNumber="89">
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<subSubSection pageId="2" pageNumber="89" type="nomenclature">
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<paragraph pageId="2" pageNumber="89">
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<taxonomicName LSID="http://zoobank.org/BB0641AE-3012-4D55-B23E-455AF235ED33" class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta multisacculata" order="Enchytraeida" pageId="2" pageNumber="89" phylum="Annelida" rank="species" species="multisacculata">Achaeta multisacculata</taxonomicName>
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<taxonomicNameLabel pageId="2" pageNumber="89">sp. n.</taxonomicNameLabel>
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Figs 1
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<normalizedToken originalValue="A–D">A-D</normalizedToken>
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, 2, 3
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</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="89" type="type locality">
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<paragraph pageId="2" pageNumber="89">Type locality.</paragraph>
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<paragraph pageId="2" pageNumber="89">Clayey soil, meadow (site 9), Yongnuni-orum, Gujwa-eup, Jeju Island, South Korea.</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="89" type="holotype">
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<paragraph pageId="2" pageNumber="89">Holotype.</paragraph>
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<paragraph pageId="2" pageNumber="89">
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NIBRIV0000813658, slide No. 2329, adult, stained whole mounted specimen, collected on 26 Oct 2016 by Y. Hong. Paratypes. In total six stained adult and one subadult specimens on slides, coll. Y. Hong. NIBRIV0000813659, slide No. 2459 and NIBRIV0000813660, slide No. 2462 from type locality. P.120.1-P.120.4, slides No. 2305, 2460, 2478, 2482 from type locality. P.120.5, subadult specimen, slide No. 2464, site 8 (clayey soil at the bottom of the dormant crater, meadow;
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<geoCoordinate direction="north" orientation="latitude" precision="1" value="33.45859">33.45859°N</geoCoordinate>
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;
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<geoCoordinate direction="east" orientation="longitude" precision="1" value="126.83192">126.83192°E</geoCoordinate>
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; 193 m asl.), 26 Oct 2016. Further material examined. Two specimens for DNA analysis and four subadults and six juvenile specimens only in vivo.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="2" pageNumber="89" type="diagnosis">
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<paragraph pageId="2" pageNumber="89">Diagnosis.</paragraph>
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<paragraph pageId="2" pageNumber="89">
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The new species can be recognized by the following combination of characters: (1) small, slender worms (2.5-4.2 mm long and 160-220
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide at clitellum in vivo), segments 25-31; (2) six pyriform glands per segment in general; (3) clitellum weakly developed, interrupted middorsally and midventrally, with two elongate,
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<normalizedToken originalValue="“baguette-like”">"baguette-like"</normalizedToken>
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packages of gland cells on each dorso-lateral side; (4) dorsal blood vessel from VII; (5) pharyngeal glands at 4/5-6/7 connected dorsally, with ventral lobes and no secondary glands; (6) two pairs of preclitellar nephridia; (7) pars tumida of midgut from
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<normalizedToken originalValue="XII–XVI">XII-XVI</normalizedToken>
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, extending over 2-3 segments, circumferal; (8) sperm funnels small, barrel-shaped, collar well developed about as wide as funnel body; (9) male pores in XI, ventro-lateral, each pore surrounded by small inconspicuous glands; (10) spermathecae free, confined to V with an asymmetrical dilation of ampulla and the ental tube ending in an oval reservoir.
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</paragraph>
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</subSubSection>
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<subSubSection lastPageId="5" lastPageNumber="92" pageId="2" pageNumber="89" type="description">
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<paragraph pageId="2" pageNumber="89">Description.</paragraph>
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<paragraph lastPageId="4" lastPageNumber="91" pageId="2" pageNumber="89">
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Small, slender worm (Fig. 2E). Holotype (fixed) 3.2 mm long, 190
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at VIII and 200
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at clitellum (fixed), 31 segments. Paratypes 2.5-4.2 mm long, 155-200
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at VIII and 160-220
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at clitellum in vivo; 2.4-3.6 mm long, 150-210
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at VIII and 160-210
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<normalizedToken originalValue="µm">µm</normalizedToken>
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wide at clitel
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<pageBreakToken pageId="3" pageNumber="90" start="start">lum</pageBreakToken>
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when fixed; segments 25-31. Head pore on prostomium (Fig. 3A). Clitellum in
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<normalizedToken originalValue="XI–">XI-</normalizedToken>
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1/2 XII weakly developed, gland cells absent dorsally and ventrally, laterally cells in transverse rows (Figs 1C, 2G, H). On each side dorso-laterally two elongate, baguette-like packages of swollen gland cells (in the middle hyalocytes, on the two margins granulocytes) narrowing at both ends (Figs 1C, 2G, I), length of baguette
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<pageBreakToken pageId="4" pageNumber="91" start="start">190</pageBreakToken>
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-270
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<normalizedToken originalValue="μm">μm</normalizedToken>
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and width 21-26
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<normalizedToken originalValue="μm">μm</normalizedToken>
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in the middle in vivo (100-180
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<normalizedToken originalValue="μm">μm</normalizedToken>
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and 20-25
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<normalizedToken originalValue="μm">μm</normalizedToken>
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in fixed specimens, respectively). Spermathecal pores at 4/5 in lateral position. Male pores in XI (Fig. 2H).
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</paragraph>
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<caption pageId="4" pageNumber="91">
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<paragraph pageId="4" pageNumber="91">
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Figure 1.
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<normalizedToken originalValue="A–D">A-D</normalizedToken>
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<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta multisacculata" order="Enchytraeida" pageId="4" pageNumber="91" phylum="Annelida" rank="species" species="multisacculata">Achaeta multisacculata</taxonomicName>
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sp. n.: A Spermatheca B Sperm funnel C Clitellar glands, lateral view (glands middorsally and midventrally absent; two
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<normalizedToken originalValue="“baguette-like”">"baguette-like"</normalizedToken>
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packages of gland cells dorso-laterally, granular gland cells in transverse rows latero-ventrally) D Brain
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<normalizedToken originalValue="E–G">E-G</normalizedToken>
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<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Fridericia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Fridericia floriformis" order="Enchytraeida" pageId="4" pageNumber="91" phylum="Annelida" rank="species" species="floriformis">Fridericia floriformis</taxonomicName>
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sp. n.: E Sperm funnel F Coelomocytes G Spermatheca.
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</paragraph>
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</caption>
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<caption pageId="4" pageNumber="91">
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<paragraph pageId="4" pageNumber="91">
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Figure 2. Micrograph of
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<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta multisacculata" order="Enchytraeida" pageId="4" pageNumber="91" phylum="Annelida" rank="species" species="multisacculata">Achaeta multisacculata</taxonomicName>
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sp. n. A Head lateral view (b = brain, knob on brain marked with black arrow, first dorsal pyriform glands marked with white arrow) B Brain dorsal view (knob on brain marked with arrow) C Cuticle thicker dorsally than ventrally, lateral view D Transverse body wall striation by strong ring muscles E Forepart of body to VII, lateral view (b = brain, ph = pharynx, oe = oesophageal appendages, dorsal pyriform glands marked with black arrows, lateral pyriform glands marked with wider white arrows, ventral pyriform glands marked with narrower white arrows) F Pyriform glands in
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<normalizedToken originalValue="IV–IX">IV-IX</normalizedToken>
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lateral view G Clitellar glands of holotype, lateral view (dorso-laterally 2 elongate,
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<normalizedToken originalValue="“baguette-like”">"baguette-like"</normalizedToken>
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packages of hyalocytes marked with black arrows, granulocytes ventro-laterally marked with white arrow) H Granular clitellar glands in transverse rows ventrally, lateral view (male openings marked with arrow) I Two baguette-like packages of clitellar glands (marked with arrows, in the middle hyalocytes, on the margins granulocytes) J Segments
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<normalizedToken originalValue="III–VIII">III-VIII</normalizedToken>
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, lateral view (oe = oesophageal appendages with meandering canal, marked with black arrow, dv = origin of dorsal vessel, n = first nephridium, ganglia of ventral nerve cords marked with white arrows) K Segments
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<normalizedToken originalValue="IV–VIII">IV-VIII</normalizedToken>
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of paratypes NIBRIV0000813659, No. 2459 lateral view (p = pharyngeal glands, oe = oesophageal glands, spermatheca marked with arrow) A,
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<normalizedToken originalValue="D–F">D-F</normalizedToken>
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,
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<normalizedToken originalValue="H–J">H-J</normalizedToken>
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in vivo,
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<normalizedToken originalValue="B–C">B-C</normalizedToken>
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, G, K fixed, stained. Scale bars: 50
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, in H, I: 20
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<normalizedToken originalValue="μm">μm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph pageId="4" pageNumber="91">
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Body wall in vivo 10-21
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<normalizedToken originalValue="μm">μm</normalizedToken>
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with cuticle 5-9
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<normalizedToken originalValue="μm">μm</normalizedToken>
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thick dorsally and 3-5
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<normalizedToken originalValue="μm">μm</normalizedToken>
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thick ventrally (Fig. 2C). Ring muscles strong, resulting in transverse body wall striation (Fig. 2D). Septa 4/5-7/8 thickened (Fig. 2K). Frontal prostomial epithelium thickened ventrally. Pyriform epidermal glands (Fig. 2E, F) generally 3 pairs in dorsal, lateral and ventral position in each segment (XI also), sometimes difficult to observe or lateral, and ventral pairs absent: size variable, dorsal pairs largest, from II onwards, length 17-18
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<normalizedToken originalValue="µm">µm</normalizedToken>
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at II, 22-40
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<normalizedToken originalValue="µm">µm</normalizedToken>
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preclitellarly, 26-54
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<normalizedToken originalValue="µm">µm</normalizedToken>
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in the middle of body 22-26
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<normalizedToken originalValue="µm">µm</normalizedToken>
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posteriorly in vivo: lateral and ventral pairs from III onwards, length in vivo 11-25
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<normalizedToken originalValue="µm">µm</normalizedToken>
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and 11-18
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<normalizedToken originalValue="µm">µm</normalizedToken>
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preclitellarly, 21-24 and 15-17
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<normalizedToken originalValue="µm">µm</normalizedToken>
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in the middle of body, 19-25 and 12-20
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<normalizedToken originalValue="µm">µm</normalizedToken>
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posteriorly, respectively, but size subequal when fixed.
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</paragraph>
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<paragraph pageId="4" pageNumber="91">
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Brain posteriorly rounded, anteriorly convex with a conspicuous knob, 77-90
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long, 1.6-1.8 times longer than wide in vivo (Figs 1D, 2A) (70-95
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long and 1.5 times longer than wide, fixed, Fig. 2B). Suboesophageal ganglion of ventral nerve cord in
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<normalizedToken originalValue="II–IV">II-IV</normalizedToken>
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undivided, posterior ganglia segmental and separate (Fig. 2J). Two small paired post-pharyngeal bulbs present. All pharyngeal glands at 4/5-6/7 united dorsally and with ventral lobes (Fig. 2K): first pair of glands largest, no secondary glands. Two pairs of preclitellar nephridia at 7/8-8/9 slightly constricted by septa: length ratio anteseptale: postseptale 1: 2-3 preclitellarly, postseptale bent and tapering gradually into efferent duct, with small terminal vesicle (Fig. 3B). About 6 pairs of postclitellar nephridia (Fig. 3C) from 19/20. Dorsal blood vessel from VII (Fig. 2J), often with intensive pulsation in VII and VI, blood colourless. Coelomocytes disc-like, with fine granules, dark brown with clear nucleus, about 15-30
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long in vivo (Fig. 3E, F) (12-16
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, fixed). One pair of oesophageal appendages well developed dorso-laterally in V, with meandering canal in IV (Fig. 2E, J, K), clearly visible only in live worms (Fig. 3D). Chloragocytes brown, about 10-13
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long in vivo. Midgut pars tumida inconspicuous, circumferal (i.e., not confined to ventral region of intestine), in
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<normalizedToken originalValue="XII–XVI">XII-XVI</normalizedToken>
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(occupying 2-3 segments). Pygidium short, anal muscles developed (Fig. 3G).
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</paragraph>
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<caption pageId="4" pageNumber="91">
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<paragraph pageId="4" pageNumber="91">
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Figure 3. Micrograph of
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<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta multisacculata" order="Enchytraeida" pageId="4" pageNumber="91" phylum="Annelida" rank="species" species="multisacculata">Achaeta multisacculata</taxonomicName>
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sp. n. A Head pore dorsal view (marked with arrow) B Preclitellar nephridia at 8/9 (marked with arrow) C Last nephridia at 26/27 of paratype P.120.2, No. 2460 D Oesophageal appendages in V (marked with black arrow), meandering canal in IV (marked with white arrow)
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<normalizedToken originalValue="E–F">E-F</normalizedToken>
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Coelomocytes G Pygidium, the anal muscles well developed
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<normalizedToken originalValue="H–J">H-J</normalizedToken>
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Sperm funnels
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<normalizedToken originalValue="K–L">K-L</normalizedToken>
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Spermathecae of paratype NIBRIV0000813659, No. 2459 (the diverticulum-like dilation of ampulla marked with arrow in L) M Spermatheca of paratype P 120.3 slide No. 2478 (here the ental reservoir bent back into IV marked with arrow). B,
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<normalizedToken originalValue="D–E">D-E</normalizedToken>
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, G, I, J in vivo A, C, F, H,
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<normalizedToken originalValue="J–L">J-L</normalizedToken>
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fixed, stained. Scale bars: 50
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, in H, I: 20
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<normalizedToken originalValue="μm">μm</normalizedToken>
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.
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</paragraph>
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</caption>
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<paragraph lastPageId="5" lastPageNumber="92" pageId="4" pageNumber="91">
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Sperm funnels small, mostly barrel-shaped, 42-65
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long in vivo (26-42
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, fixed), about 1.5-2 times longer than wide, collar distinct 8-10
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<normalizedToken originalValue="μm">μm</normalizedToken>
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high, about as wide as diameter of funnel body (Figs 1B, 3
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<normalizedToken originalValue="H–J">H-J</normalizedToken>
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). Sperm ducts about 6
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<normalizedToken originalValue="μm">μm</normalizedToken>
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thick in vivo (4-5
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, fixed). Spermatozoa with unusual strong tails (Fig. 3H), 50-70
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long, heads 15-22
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long in vivo (26-42
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<normalizedToken originalValue="μm">μm</normalizedToken>
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and 11-14
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<normalizedToken originalValue="μm">μm</normalizedToken>
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, fixed). Seminal vesicle absent. Male copulatory organs small oval, widely separated ventro-laterally, pore surrounded by small inconspicuous glands (Fig. 2H). Spermathecae free, confined to V (in one case extending into VI in vivo and in one case bent backwards into IV (slide 2478) (Fig. 3M). Ectal ducts 30-32
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long and 14-16
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide in vivo (31-42
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long and 9-10
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide, fixed), ducts slightly widen out to a dilation of ampullae with a diverticulum-like protrusion (dilation diameter 20-25
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<normalizedToken originalValue="μm">μm</normalizedToken>
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). After dilation, ental tubes (about 40-65
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long and 20
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide) end in an elongated reservoir
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<pageBreakToken pageId="5" pageNumber="92" start="start">(</pageBreakToken>
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24-45
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long, 15-26
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide in vivo) (20-27
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<normalizedToken originalValue="μm">μm</normalizedToken>
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long and 13-18
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<normalizedToken originalValue="μm">μm</normalizedToken>
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wide, fixed) (Figs 1A, 3
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<normalizedToken originalValue="K–M">K-M</normalizedToken>
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).
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</paragraph>
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<paragraph pageId="5" pageNumber="92">
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Although the specimens are adult, the clitellar glands appear weakly developed. The reason is that this organ is fully developed only just before the release of an egg (as was remarked by
|
||
<bibRefCitation author="Schmelz, RM" journalOrPublisher="Zootaxa" pageId="14" pageNumber="101" pagination="1 - 35" title="Mata Atlantica enchytraeids (Parana, Brasil): The genus Achaeta (Oligochaeta, Enchytraeidae)." volume="1809" year="2008">Schmelz et al. 2008</bibRefCitation>
|
||
), and indeed our worms did not have mature eggs.
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="5" pageNumber="92" type="etymology">
|
||
<paragraph pageId="5" pageNumber="92">Etymology.</paragraph>
|
||
<paragraph pageId="5" pageNumber="92">
|
||
Named after the high number of 'pyriform
|
||
<normalizedToken originalValue="glands’">glands'</normalizedToken>
|
||
(sacculus = saccule, Latin).
|
||
</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="5" pageNumber="92" type="molecular data">
|
||
<paragraph pageId="5" pageNumber="92">Molecular data.</paragraph>
|
||
<paragraph pageId="5" pageNumber="92">Sequences deposited in GenBank: MH128727-MH128728 (ITS), MH124584-MH124585 (CO1).</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="5" pageNumber="92" type="distribution">
|
||
<paragraph pageId="5" pageNumber="92">Distribution.</paragraph>
|
||
<paragraph pageId="5" pageNumber="92">In South Korea, at sites 8-9, Jeju Island, Yongnuni-orums, clayey soil, meadows.</paragraph>
|
||
</subSubSection>
|
||
<subSubSection pageId="5" pageNumber="92" type="morphologically similar species">
|
||
<paragraph pageId="5" pageNumber="92">Morphologically similar species.</paragraph>
|
||
<paragraph pageId="5" pageNumber="92">
|
||
Two
|
||
<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta" order="Enchytraeida" pageId="5" pageNumber="92" phylum="Annelida" rank="genus">Achaeta</taxonomicName>
|
||
species with six pyriform glands per segment have been previously described: the European
|
||
<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta aberrans" order="Enchytraeida" pageId="5" pageNumber="92" phylum="Annelida" rank="species" species="aberrans">Achaeta aberrans</taxonomicName>
|
||
Nielsen & Christensen, 1961 and the South American
|
||
<taxonomicName class="Clitellata" family="Enchytraeidae" genus="Achaeta" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Achaeta piti" order="Enchytraeida" pageId="5" pageNumber="92" phylum="Annelida" rank="species" species="piti">Achaeta piti</taxonomicName>
|
||
Bittencourt, 1974, emended
|
||
<bibRefCitation author="Schmelz, RM" journalOrPublisher="Zootaxa" pageId="14" pageNumber="101" pagination="1 - 35" title="Mata Atlantica enchytraeids (Parana, Brasil): The genus Achaeta (Oligochaeta, Enchytraeidae)." volume="1809" year="2008">Schmelz et al. 2008</bibRefCitation>
|
||
. The new species can be easily distinguished from
|
||
<taxonomicName lsidName="A. aberrans" pageId="5" pageNumber="92" rank="species" species="aberrans">A. aberrans</taxonomicName>
|
||
which has fewer segments, 20-23 (vs. 26-31 in the new species), dorsal vessel originating in VI (vs. in VII), oesophageal appendages small and only in V (vs. well developed in
|
||
<normalizedToken originalValue="IV–V">IV-V</normalizedToken>
|
||
), male opening in XII (vs. in XI), coelomocytes oval, finely granulated and at one end tapering into a thin process (vs. discoid and brown), the preclitellar nephridia in 6/7 and 7/8 (vs. 7/8 and 8/9), the spermathecae, when present, with laterally symmetrical ampullae. The other species,
|
||
<taxonomicName lsidName="A. piti" pageId="5" pageNumber="92" rank="species" species="piti">A. piti</taxonomicName>
|
||
is very similar to
|
||
<taxonomicName lsidName="A. multisacculata" pageId="5" pageNumber="92" rank="species" species="multisacculata">A. multisacculata</taxonomicName>
|
||
sp. n., because of the reproductive organs (except the spermathecae) shifted one segment forward, the oesophageal appendages well developed with canal in IV-V, two pairs of nephridia in 7/8-8/9, dorsal blood vessel origin in VII and the spermatheca with ectal asymmetry. In addition, in both species two elongate, dorso-lateral
|
||
<normalizedToken originalValue="„baguette-like”">"baguette-like"</normalizedToken>
|
||
packages of hyalocytes occur in the clitellum. Characters that differentiate
|
||
<taxonomicName lsidName="A. multisacculata" pageId="5" pageNumber="92" rank="species" species="multisacculata">A. multisacculata</taxonomicName>
|
||
sp. n. from
|
||
<taxonomicName lsidName="A. piti" pageId="5" pageNumber="92" rank="species" species="piti">A. piti</taxonomicName>
|
||
are: (1) body size slightly smaller: 2.5-4.2 mm in vivo and 2.2-3.6 mm, fixed, 160-220
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
wide at clitellum [according to
|
||
<bibRefCitation author="Schmelz, RM" journalOrPublisher="Zootaxa" pageId="14" pageNumber="101" pagination="1 - 35" title="Mata Atlantica enchytraeids (Parana, Brasil): The genus Achaeta (Oligochaeta, Enchytraeidae)." volume="1809" year="2008">Schmelz et al. 2008</bibRefCitation>
|
||
, live
|
||
<taxonomicName lsidName="A. piti" pageId="5" pageNumber="92" rank="species" species="piti">A. piti</taxonomicName>
|
||
worms are ca. 5 mm long and 150
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
wide in vivo (fixed type specimens are 3.5-5 mm long, 190
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
wide and specimens at Zoological Museum in Hamburg even longer, 4.5-6.5 mm and up to 250
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
wide)]; (2) segment number smaller, 26-31 (vs. 31-36); (3) brain anteriorly with a conspicuous knob (vs. without knob); (4) coelomocytes dark brown, 15-30
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
long (vs. pale, 15-18
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
long, cells somewhat darker than coelom); (5) sperm funnel smaller, mostly barrel-shaped, without vesicles, 42-65
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
long in vivo, 26-42
|
||
<normalizedToken originalValue="μm">μm</normalizedToken>
|
||
, fixed, only 1.5-2 times longer than wide (vs. cylindrical, with large vesicles, ca. half as long as body diameter, more than 3 times longer than wide); (6) pars tumida of midgut at
|
||
<normalizedToken originalValue="XII–XVI">XII-XVI</normalizedToken>
|
||
, 2-3 segments long (vs.
|
||
<normalizedToken originalValue="XX–XXIV">XX-XXIV</normalizedToken>
|
||
); (7) in pygidium anal muscles clearly visible (vs. not strongly developed); (8) spermatheca similar but except one specimen always confined in V (vs. ampulla extending into VI or VII).
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |