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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.735.21164" ID-GBIF-Dataset="02e373f0-3ec6-464c-8dfb-59b60cd744a0" ID-PMC="PMC5904325" ID-Pensoft-Pub="1313-2970-735-1" ID-PubMed="29674859" ID-ZBK="B2D964967F354537B004281799E894C4" ModsDocAuthor="" ModsDocDate="2018" ModsDocID="1313-2970-735-1" ModsDocOrigin="ZooKeys 735" ModsDocTitle="Mayaweckeliatroglomorpha, a new subterranean amphipod species from Yucatán state, México (Amphipoda, Hadziidae)" checkinTime="1517955158349" checkinUser="pensoft" docAuthor="Angyal, Dorottya, Solis, Efrain Chavez, Magana, Benjamin, Balazs, Gergely &amp; Simoes, Nuno" docDate="2018" docId="D1A52CD1B52F3BB3A5989462FBA5DA86" docLanguage="en" docName="ZooKeys 735: 1-25" docOrigin="ZooKeys 735" docSource="http://dx.doi.org/10.3897/zookeys.735.21164" docTitle="Mayaweckelia troglomorpha Angyal, sp. n." docType="treatment" docUuid="32D988B9-58D3-4224-9A21-53B9C2BFB8F5" docUuidSource="ZooBank" docVersion="5" lastPageNumber="14" masterDocId="CF133652355DFFE8FFDFFFCCFF8AFFC1" masterDocTitle="Mayaweckeliatroglomorpha, a new subterranean amphipod species from Yucatan state, Mexico (Amphipoda, Hadziidae)" masterLastPageNumber="25" masterPageNumber="1" pageNumber="5" updateTime="1668165404921" updateUser="ExternalLinkService">
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<mods:titleInfo>
<mods:title>Mayaweckeliatroglomorpha, a new subterranean amphipod species from Yucatan state, Mexico (Amphipoda, Hadziidae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Angyal, Dorottya</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Solis, Efrain Chavez</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Magana, Benjamin</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Balazs, Gergely</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Simoes, Nuno</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:title>ZooKeys</mods:title>
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<mods:part>
<mods:date>2018</mods:date>
<mods:detail type="volume">
<mods:number>735</mods:number>
</mods:detail>
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<mods:start>1</mods:start>
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<mods:url>http://dx.doi.org/10.3897/zookeys.735.21164</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.735.21164</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-735-1</mods:identifier>
<mods:identifier type="ZBK">B2D964967F354537B004281799E894C4</mods:identifier>
<mods:identifier type="ZooBank">B2D964967F354537B004281799E894C4</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="141125675" LSID="urn:lsid:zoobank.org:act:32D988B9-58D3-4224-9A21-53B9C2BFB8F5" httpUri="http://treatment.plazi.org/id/D1A52CD1B52F3BB3A5989462FBA5DA86" lastPageId="14" lastPageNumber="14" pageId="4" pageNumber="5">
<subSubSection pageId="4" pageNumber="5" type="nomenclature">
<paragraph pageId="4" pageNumber="5">
<taxonomicName LSID="http://zoobank.org/32D988B9-58D3-4224-9A21-53B9C2BFB8F5" authority="Angyal" class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia troglomorpha" order="Amphipoda" pageId="4" pageNumber="5" phylum="Arthropoda" rank="species" species="troglomorpha">Mayaweckelia troglomorpha Angyal</taxonomicName>
<taxonomicNameLabel pageId="4" pageNumber="5">sp. n.</taxonomicNameLabel>
Figs 2, 3, 4, 5, 6, 7, 8, 9
</paragraph>
</subSubSection>
<subSubSection lastPageId="5" lastPageNumber="6" pageId="4" pageNumber="5" type="materials_examined">
<paragraph pageId="4" pageNumber="5">Material examined.</paragraph>
<paragraph pageId="4" pageNumber="5">
Holotype ♂, 10 mm, Nr. 00046, 14 May 2016, Dzonbakal,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.669819">20.669819°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.77887">89.778869°W</geoCoordinate>
, San Antonio Mulix,
<normalizedToken originalValue="Umán">Uman</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal, R. Acosta, J. Baduy &amp; S. Reyes in cave part, 26.7 m depth in fresh water; dissected and mounted on slide. Collection ID: CNR 34392 (UNAM, Institute of Biology, National Crustacean Collection,
<normalizedToken originalValue="México">Mexico</normalizedToken>
City.)
</paragraph>
<paragraph pageId="4" pageNumber="5">
Allotype ♀, 10 mm, Nr. 00113, 11 June 2016, Cenote
<normalizedToken originalValue="Kankirixché">Kankirixche</normalizedToken>
,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.37225">20.37225°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.63289">89.632892°W</geoCoordinate>
,
<normalizedToken originalValue="Mucuyché">Mucuyche</normalizedToken>
,
<normalizedToken originalValue="Abalá">Abala</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal &amp; E.M.
<normalizedToken originalValue="Chávez">Chavez</normalizedToken>
<normalizedToken originalValue="Solís">Solis</normalizedToken>
in cavern part, 20.4 m depth in fresh water; dissected and mounted on slide. Collection ID: HNHM
<taxonomicName lsidName="Senticaudata" order="Amphipoda" pageId="4" pageNumber="5" rank="order">Amphipoda</taxonomicName>
-4094 (Hungarian Natural History Museum, Collection of Crustaceans, Budapest).
</paragraph>
<paragraph pageId="4" pageNumber="5">
Paratypes ♀, 7 mm, Nr. 00056, 14 May 2016, Dzonbakal,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.669819">20.669819°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.77887">89.778869°W</geoCoordinate>
, San Antonio Mulix,
<normalizedToken originalValue="Umán">Uman</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal, R. Acosta, J. Baduy &amp; S. Reyes in cave part, 26.3 m depth in fresh water; sputter-coated by gold-palladium. Collection ID: HNHM
<taxonomicName lsidName="Senticaudata" order="Amphipoda" pageId="4" pageNumber="5" rank="order">Amphipoda</taxonomicName>
-4095 (Hungarian Natural History Museum, Collection of Crustaceans, Budapest).
</paragraph>
<paragraph pageId="4" pageNumber="5">
♂, 8 mm, Nr. 00043, 4 June 2016, Cenote
<normalizedToken originalValue="Kanún">Kanun</normalizedToken>
,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.7456">20.745599°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.24464">89.244638°W</geoCoordinate>
,
<normalizedToken originalValue="Homún">Homun</normalizedToken>
,
<normalizedToken originalValue="Homún">Homun</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal, R. Acosta, J. Baduy, B.
<normalizedToken originalValue="Magaña">Magana</normalizedToken>
&amp; S. Reyes in cave part, 24.3 m depth in fresh water; not dissected. Collection ID: CNR 34393 (UNAM, Institute of Biology, National Crustacean Collection,
<normalizedToken originalValue="México">Mexico</normalizedToken>
City).
</paragraph>
<paragraph lastPageId="5" lastPageNumber="6" pageId="4" pageNumber="5">
Juvenile, 3 mm, Nr. 00095, 9 June 2016, Cenote Xaan,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.727571">20.727571°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.256836">89.256834°W</geoCoordinate>
,
<normalizedToken originalValue="Homún">Homun</normalizedToken>
,
<normalizedToken originalValue="Homún">Homun</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal &amp; E.M.
<normalizedToken originalValue="Chávez">Chavez</normalizedToken>
<normalizedToken originalValue="Solís">Solis</normalizedToken>
in cave part, 25.4 m depth in fresh water; not dissected. Collection
<pageBreakToken pageId="5" pageNumber="6" start="start">ID</pageBreakToken>
: YUC-CC-255-11-003922 (UNAM, Academic Multidisciplinary Unit of Teaching and Research,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
<taxonomicName lsidName="Crustacea" pageId="5" pageNumber="6" rank="subphylum" subphylum="Crustacea">Crustacea</taxonomicName>
Collection, Sisal).
</paragraph>
<paragraph pageId="5" pageNumber="6">
Juvenile, 5 mm, Nr. 00110, 11 June 2016, Cenote
<normalizedToken originalValue="Kankirixché">Kankirixche</normalizedToken>
,
<geoCoordinate direction="north" orientation="latitude" precision="1" value="20.37225">20.37225°N</geoCoordinate>
,
<geoCoordinate direction="west" orientation="longitude" precision="1" value="-89.63289">89.632892°W</geoCoordinate>
,
<normalizedToken originalValue="Mucuyché">Mucuyche</normalizedToken>
,
<normalizedToken originalValue="Abalá">Abala</normalizedToken>
,
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
state,
<normalizedToken originalValue="México">Mexico</normalizedToken>
, collected by D. Angyal &amp; E.M.
<normalizedToken originalValue="Chávez">Chavez</normalizedToken>
<normalizedToken originalValue="Solís">Solis</normalizedToken>
in cave part, 33.3 m depth in fresh water; dissected and mounted on slide. Collection ID: HNHM
<taxonomicName lsidName="Crustacea" order="Amphipoda" pageId="5" pageNumber="6" rank="order">Amphipoda</taxonomicName>
-4096 (Hungarian Natural History Museum, Collection of Crustaceans, Budapest).
</paragraph>
</subSubSection>
<subSubSection lastPageId="6" lastPageNumber="7" pageId="5" pageNumber="6" type="diagnosis">
<paragraph pageId="5" pageNumber="6">Diagnosis.</paragraph>
<paragraph lastPageId="6" lastPageNumber="7" pageId="5" pageNumber="6">
Medium-sized, eyeless hadziid with conspicuous troglomorphic traits. The first antenna almost twice as long as body and three times as long as the second antenna; gnathopod I propodus palm armed with distally notched spine teeth, carpus more than 1.5 times as long as corresponding propodus, merus as broad as but shorter than carpus, ventrally produced lobe with three long sensory setae; gnathopod II propodus twice as long as propodus I, palm armed with unnotched spine teeth, carpus
<pageBreakToken pageId="6" pageNumber="7" start="start">slightly</pageBreakToken>
shorter than propodus on males. Dactylus, propodus. and carpus of pereopods VI-VII extremely long; therefore, pereopods VI and VII are 1.3 times as long as body length; epimeral plates I-III ventro-posterior corner tiny but distinct, ventral margin without robust setae, posterior margins concave; surfaces of uropods I-III pubescent; telson lobes each possess five-six robust setae and one-three slender setae on outer margin and six-seven robust setae on inner margin. Largest males and females both measured 10 mm.
</paragraph>
</subSubSection>
<subSubSection lastPageId="11" lastPageNumber="12" pageId="6" pageNumber="7" type="description">
<paragraph pageId="6" pageNumber="7">Description.</paragraph>
<paragraph lastPageId="7" lastPageNumber="8" pageId="6" pageNumber="7">
(10 mm ♂, 8 mm ♂, 8 mm ♀, 7 mm ♀, 5 mm juvenile, 3 mm juvenile.) Antenna 1 (Figures 2, 3) 1.75 times as long as body; three times long as antenna II; primary flagellum with more than 60 articles; aesthetacs were not visible as distal half of the flagellum was missing from each animal (examination of the antennae was possible only using the photos of the living specimens); accessory flagellum with three articles. Antenna II (Figures 2, 3): flagellum with more than 20 articles. Mandibles (Figure 3) subequal; both molar with seta; setal row with four or five serrated setae; palp lacking. Maxilla I (Figure 3): inner plate with approximately 15 apical setae; outer
<pageBreakToken pageId="7" pageNumber="8" start="start">plate</pageBreakToken>
with eight apical, pluri-toothed robust setae; second palpal article with five apical robust setae. Maxilla II (Figure 3): inner plate with 15-23 obliquely placed setae on inner margin. Maxilliped (Figure 3): inner plate with four or five cone shaped, thick robust setae and several coarse setae apically; outer plate with stiff setae apically. Lower lip (Figure 3): outer lobes narrowly rounded; lateral process prominent; inner lobes rather small.
</paragraph>
<caption pageId="7" pageNumber="8">
<paragraph pageId="7" pageNumber="8">
Figure 2.
<taxonomicName lsidName="M. troglomorpha" pageId="7" pageNumber="8" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n., living specimens. Above: allotype ♀ collected in Cenote
<normalizedToken originalValue="Kankirixché">Kankirixche</normalizedToken>
; below: individual photographed in its natural habitat during research dive in Cenote
<normalizedToken originalValue="Kanún">Kanun</normalizedToken>
(not collected).
</paragraph>
</caption>
<caption pageId="7" pageNumber="8">
<paragraph pageId="7" pageNumber="8">
Figure 3.
<taxonomicName lsidName="M. troglomorpha" pageId="7" pageNumber="8" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n. A detail of head and antenna I and II (♀ allotype) B detail of antenna I with accessory flagellum (♀ allotype) C antenna II peduncle articles and proximal part of flagellum (♀ allotype) D upper lip (♂ holotype) E lower lip (♂ holotype) F left mandible (♀ allotype) G maxilliped (8 mm ♂) H maxilla 1 (♀ allotype) I maxilla II (♀ allotype) J maxilla I outer plate (♂ holotype).
</paragraph>
</caption>
<paragraph lastPageId="9" lastPageNumber="10" pageId="7" pageNumber="8">
Gnathopod I (Figure 4, 5): dactyl thick, single seta present on anterior margin, inner margin without seta, unguis (nail) length 35% of total dactylus length. Propodus
<pageBreakToken pageId="8" pageNumber="9" start="start">small</pageBreakToken>
, longer than broad; palm short, slightly convex, in palmar corner double row of four-five distally notched spine teeth always present, additional notched spine teeth and spine-like setae sometimes present on palm, close to the base of dactylus; posterior margin of propodus slightly concave, surface near margin covered with pubescent setae; anterior margin with five-seven rows of long, plumose setae (sometimes singly inserted); antero-distal group with six-eight long plumose and simple setae; four singly
<pageBreakToken pageId="9" pageNumber="10" start="start">inserted</pageBreakToken>
helical medial setae always present, sometimes additional singly or doubly inserted medial setae present. Carpus narrow, 1.5-1.7 times longer than propodus. Merus: as broad as but shorter than carpus, ventrally produced into pubescence, conspicuous lobe with three long sensory setae. Sensory papillae visible on one of the setae. Coxal plate I large, deep, longer than broad, broadly rounded ventrally, margin with three-four robust setae and seven-eight slender setae on females and six robust setae and three-eight slender setae on males.
</paragraph>
<caption pageId="9" pageNumber="10">
<paragraph pageId="9" pageNumber="10">
Figure 4.
<taxonomicName lsidName="M. troglomorpha" pageId="9" pageNumber="10" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n. A gnathopod I (♀ allotype) B gnathopod I propodus, carpus and merus (♀ allotype) C gnathopod I coxa (♂ holotype) D oostegite and gill on gnathopod II (♀ allotype) E gnathopod II (♂ holotype) F gnathopod II (♀ allotype).
</paragraph>
</caption>
<caption pageId="9" pageNumber="10">
<paragraph pageId="9" pageNumber="10">
Figure 5.
<taxonomicName lsidName="M. troglomorpha" pageId="9" pageNumber="10" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n., (7 mm ♀), scanning electron micrographs. A gnathopod I propodus; B, gnathopod I palmar corner C gnathopod I propodus posteromedial part D gnathopod I propodus anterodistal seta group E gnathopod I propodus anterior margin seta group F ventrally produced conspicous lobe on gnathopod I merus. Abbreviations: gp1-p = gnathopod I propodus, gp2-p = gnathopod II propodus (A); nst = notched spine teeth (B); pub-s = pubescent setae, h-s = helical medial seta (C); pl-s = plumose seta, s-s = simple seta (D); pl-s = plumose seta (E); cl = conspicous lobe (F).
</paragraph>
</caption>
<paragraph pageId="10" pageNumber="11">
<pageBreakToken pageId="10" pageNumber="11" start="start">Gnathopod</pageBreakToken>
II (Figure 4, 6): dactylus thick, along anterior margin (close to antero-distal corner) a single seta present, inner margin with three-five setae. Propodus twice as long as gnathopod I propodus, narrow, subrectangular; palm length is more than 50% of propodus length on males and less than 50% of propodus length on females; palm armed with double row of five-six unnotched spine teeth which are sometimes accompanied by long, pearl row-like setae; surface near margin covered with pubescent setae; helical seta sometimes present below (proximal to) spine teeth; posterior margin with four-five, anterior margin with six-nine sets of plumose setae; three-four medial plumose setae. Carpus slightly shorter than propodus on males and slightly longer than propodus on females, armed with seven-eight rows of comb-like plumose setae on posterior margin. Merus as broad as but more than two times shorter than carpus; not produced ventrally into conspicuous lobe. Coxal plate II kidney-shaped, margin with three-four robust setae and eight slender setae.
</paragraph>
<caption pageId="10" pageNumber="11">
<paragraph pageId="10" pageNumber="11">
Figure 6.
<taxonomicName lsidName="M. troglomorpha" pageId="10" pageNumber="11" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n., (7 mm ♀), scanning electron micrographs. A gnathopod I and II propodus B gnathopod II propodus dactylus and palm C gnathopod II propodus palm D gnathopod II propodus posterior margin E gnathopod II carpus F comb-like plumose seta on gnathopod II carpus. Abbreviations: gp1-p = gnathopod I propodus, gp2-p = gnathopod II propodus (A); dact = dactylus, n = nail, unst-t = unnotched spine teeth (B); pr-s = pearl row-like seta, unst-t = unnotched spine teeth (C); pl-s = plumose seta (D); carp = carpus, cl-s = comb-like plumose setae (E); cl-s = comb-like plumose seta (F).
</paragraph>
</caption>
<paragraph pageId="10" pageNumber="11">Coxal plate III (Figure 7) rather small and shallow, margin with two fine setae. Coxal plate IV (Figure 7) more than twice as broad as coxal plate III; posterior margin concave, ventral margin with four short stiff setae; dactylus length 28% of propodus; single robust seta and one long slender seta at the base of the unguis. Pereopod V (Figure 7) basis 1.7 times longer than broad, margins convex; pereopods VI (Figure 7) and VII (Figure 7) bases twice as long as broad, margins of pereopod VI slightly convex, posterior margin of pereopod VII straight; dactylus of pereopod V 40% length of corresponding propodus; outer margin with two slender setae; pereopod VI and VII extremely long (especially dactylus, propodus and carpus), 1.3 times as long as body; pereopod VI slightly longer than pereopod VII; pereopod VII dactylus with some short, slender setae at the base of the unguis. Coxal gills (Figure 4) large, almond shaped, pedicellate, present on pereon segments II-VI; oostegites (Figure 4) long, slender. Pleopods (Figs 7, 9) I-III with two-hooked retinaculae.</paragraph>
<caption pageId="10" pageNumber="11">
<paragraph pageId="10" pageNumber="11">
Figure 7.
<taxonomicName lsidName="M. troglomorpha" pageId="10" pageNumber="11" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n., ♂ holotype. A pereopod III (dactylus was missing) B pereopod IV C pereopod IV dactylus D pereopod V E pereopod VI coxa, basis, ischium and merus F pereopod VII G distal part of pereopod VII with detail of unguis H pleopod III I retinacle on pleopod II.
</paragraph>
</caption>
<paragraph pageId="10" pageNumber="11">Epimeral plates I-III (Figure 8) ventro-posterior corner tiny but distinct with one slender seta at the corner; ventral margin without robust setae; posterior margin slightly concave on epimeral plate I, concave on epimeral plate II and strongly concave on epimeral plate III. Urosomites (Figure 8): urosomite I with one strong robust seta at the base of uropod I; urosomite II without robust and slender setae; urosomite III with one robust seta mid-dorsally.</paragraph>
<caption pageId="10" pageNumber="11">
<paragraph pageId="10" pageNumber="11">
Figure 8.
<taxonomicName lsidName="M. troglomorpha" pageId="10" pageNumber="11" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n. A telson (♀ allotype) B uropod III (♀ allotype) C uropod II (♂ holotype) D uropod I (♂ holotype) E urosomites (♀ paratype, 7 mm) F pleonite III (♀ allotype) G pleonite II (♀ allotype) H pleonite I (♀ allotype).
</paragraph>
</caption>
<paragraph lastPageId="11" lastPageNumber="12" pageId="10" pageNumber="11">
Uropod I (Figures 8, 9) surface of rami and peduncle covered with pubescent setae; outer ramus 10-15% longer than inner ramus, outer ramus 20-33% shorter than peduncle; peduncle with five-eight spine-like robust setae; outer ramus with four-six robust setae (plus five apical robust setae), inner ramus with five-six robust setae (plus five apical robust setae). Uropod II (Figures 8, 9) surface of rami and peduncle covered with pubescent setae; outer ramus 13-22% longer than inner ramus on the studied males and 25-35% longer than inner ramus on females; outer ramus 5-15% longer than peduncle; peduncle with six spine-like robust setae; inner ramus with three-four robust setae (plus five apical robust setae); outer ramus with four-five robust setae (plus five apical robust setae). Uropod III (Figures 8, 9) surface of rami and distal end of peduncle covered with pubescent setae; uropod III 20%
<pageBreakToken pageId="11" pageNumber="12" start="start">as</pageBreakToken>
long as body; inner ramus slightly longer than outer ramus, margins with long, singly-inserted plumose and pappose setae and some short robust setae, apex with two short spine-like robust setae; outer ramus with long, plumose setae on inner margin and short robust setae on outer margin toward distal end, apex with three robust setae and sometimes additional with long spine-like seta; peduncle with two-four robust setae.
</paragraph>
<caption pageId="11" pageNumber="12">
<paragraph pageId="11" pageNumber="12">
Figure 9.
<taxonomicName lsidName="M. troglomorpha" pageId="11" pageNumber="12" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n., (7 mm ♀), scanning electron micrographs. A pleopods I-III and uropods I and II B retinacle on pleopod I; C, spine-like robust setae on uropod I and II D detail of uropod I peduncle article E setae on uropod III inner ramus F apical region of uropod III outer ramus. Abbreviations: pl1 = pleopod I, pl2 = pleopod II, pl3 = pleopod III, u1 = uropod I, u2 = uropod II (A); ret = retinacle, pl 1 = pleopod I (B); pl3 = pleopod III, u1-ped = peduncle article of uropod I, u2-ped = peduncle article of uropod II, sp = spine-like robust setae (C); pub-s = pubescence setae, u1-ped = uropod I peduncle article, sp = spine-like robust seta (D); pa-s = pappose seta, u3-inner r = uropod III inner ramus (E); pl-s = plumose seta, sp = spine-like robust seta, pub-s = pubescent setae, u3-outer r = uropod III outer ramus (F).
</paragraph>
</caption>
<paragraph pageId="11" pageNumber="12">Telson (Figure 8) cleft to base, each half 2.65 times longer than broad; lobes each with five-six robust setae and one-three slender setae on outer margin and six-seven robust setae on inner margin.</paragraph>
</subSubSection>
<subSubSection lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12" type="variability">
<paragraph pageId="11" pageNumber="12">Variability.</paragraph>
<paragraph lastPageId="12" lastPageNumber="13" pageId="11" pageNumber="12">
Sexes very similar in size and appearance, except a few traits. Propodus I more oblong in males than in females. Coxal plate I margin with six robust setae and three-eight slender setae in males, and with three or four robust setae and seven-eight slender setae in females. Palm length of gnathopod II is more than 50 % of propodus length on males and less than 50 % of propodus length on females. Carpus of gnathopod II slightly shorter than propodus on males and slightly longer than propodus on females. Sexually mature females have long and narrow oostegites. Left and right side gnathopod I and II are unequal in length in both sexes. Outer ramus of uropod II 13-22 % longer than inner ramus on males and 25-35 % longer than inner ramus
<pageBreakToken pageId="12" pageNumber="13" start="start">on</pageBreakToken>
females, however this character should be further analysed on an elevated number of individuals of both sexes.
</paragraph>
</subSubSection>
<subSubSection pageId="12" pageNumber="13" type="etymology">
<paragraph pageId="12" pageNumber="13">Etymology.</paragraph>
<paragraph pageId="12" pageNumber="13">
The name
<taxonomicName class="Insecta" family="Apidae" genus="Crustacea" higherTaxonomySource="GBIF" kingdom="Animalia" lsidName="Crustacea troglomorpha" order="Hymenoptera" pageId="12" pageNumber="13" phylum="Arthropoda" rank="species" species="troglomorpha">troglomorpha</taxonomicName>
refers to the highly adaptive troglomorphic features of the new species, particularly the elongation of appendages, the increased number of sensory setae and papillae, and general appearance of fragility. Gender feminine.
</paragraph>
</subSubSection>
<subSubSection pageId="13" pageNumber="14" type="distribution">
<paragraph pageId="13" pageNumber="14">
<pageBreakToken pageId="13" pageNumber="14" start="start">Distribution</pageBreakToken>
and remarks on ecology.
</paragraph>
<paragraph pageId="13" pageNumber="14">
The new species is known from four cenotes in the state of
<normalizedToken originalValue="Yucatán">Yucatan</normalizedToken>
, covering a distribution distance of 52 km (distance between the farthest cenotes Dzonbakal and Xaan). All the individuals were found in fresh water habitat, in most cases far from the cenote entrances, deeper in the associated cave passages, where sunlight does not penetrate. Water temperature was between 26 and 27 °C. Specimens were collected between 20 and 33 meters depth; in cenote
<normalizedToken originalValue="Kankirixché">Kankirixche</normalizedToken>
some individuals were observed below 45 meters depth. The new species was represented in all four localities with low abundance, though it proved to be more common and more abundant than
<taxonomicName lsidName="M. cenoticola" pageId="13" pageNumber="14" rank="species" species="cenoticola">M. cenoticola</taxonomicName>
, of which a single specimen was found in only one (Ayun-Nah) of the 14 visited cenotes, during an underwater waste collecting activity, hidden in a plastic soft drink bottle. In the type locality and in cenotes Xaan and
<normalizedToken originalValue="Kankirixché">Kankirixche</normalizedToken>
the new species co-occurred with the hadziid amphipod
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Tuluweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Tuluweckelia cernua" order="Amphipoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="cernua">Tuluweckelia cernua</taxonomicName>
. Other co-occurring stygobiont macro-crustaceans (in the four cenotes) were the mysid
<taxonomicName class="Malacostraca" family="Mysidae" genus="Antromysis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Antromysis cenotensis" order="Mysida" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="cenotensis">Antromysis cenotensis</taxonomicName>
Creaser, 1936, the stygiomysid
<taxonomicName class="Malacostraca" family="Stygiomysidae" genus="Stygiomysis" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Stygiomysis holthuisi" order="Mysida" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="holthuisi">Stygiomysis cf. holthuisi</taxonomicName>
(Gordon, 1958), the isopods
<taxonomicName class="Malacostraca" family="Cirolanidae" genus="Creaseriella" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Creaseriella anops" order="Isopoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="anops">Creaseriella anops</taxonomicName>
(Creaser, 1936) and
<taxonomicName class="Malacostraca" family="Cirolanidae" genus="Yucatalana" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Yucatalana robustispina" order="Isopoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="robustispina">Yucatalana robustispina</taxonomicName>
Botosaneanu &amp; Iliffe, 1999, and the decapods
<taxonomicName class="Malacostraca" family="Atyidae" genus="Typhlatya" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Typhlatya mitchelli" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="mitchelli">Typhlatya mitchelli</taxonomicName>
Hobbs &amp; Hobbs, 1976,
<taxonomicName class="Malacostraca" family="Atyidae" genus="Typhlatya" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Typhlatya pearsei" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="pearsei">Typhlatya pearsei</taxonomicName>
Creaser, 1936, and
<taxonomicName class="Malacostraca" family="Palaemonidae" genus="Creaseria" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Creaseria morleyi" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="morleyi">Creaseria morleyi</taxonomicName>
(Creaser, 1936).
</paragraph>
</subSubSection>
<subSubSection lastPageId="14" lastPageNumber="15" pageId="13" pageNumber="14" type="remarks">
<paragraph pageId="13" pageNumber="14">Remarks and affinities to related species and genera.</paragraph>
<paragraph pageId="13" pageNumber="14">
<bibRefCitation author="Holsinger, JR" journalOrPublisher="Beaufortia" pageId="20" pageNumber="21" pagination="97 - 107" title="Tuluweckeliacernua, a new genus and species of stygobiont amphipod crustacean (Hadziidae) from anchialine caves on the Yucatan Peninsula in Mexico." volume="41" year="1990">Holsinger (1990)</bibRefCitation>
noted that his original description of
<taxonomicName lsidName="M. yucatanensis" pageId="13" pageNumber="14" rank="species" species="yucatanensis">M. yucatanensis</taxonomicName>
(
<bibRefCitation author="Holsinger, JR" journalOrPublisher="Association for Mexican Cave Studies, Bulletin" pageId="19" pageNumber="20" pagination="15 - 25" title="A new genus and two new species of subterranean amphipod crustaceans (Gammaridae s. lat.) from the Yucatan Peninsula in Mexico." volume="6" year="1977">Holsinger 1977</bibRefCitation>
) 'was based on what appear to be submature specimens, therefore raising the strong possibility that the differences noted between the two species of
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia" order="Amphipoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">Mayaweckelia</taxonomicName>
are due primarily to
<normalizedToken originalValue="age">age'</normalizedToken>
, and the two species probably should be synonymized. However, the synonymisation has not been published until now.
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia troglomorpha" order="Amphipoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="troglomorpha">Mayaweckelia troglomorpha</taxonomicName>
sp. n. differs from
<taxonomicName lsidName="M. yucatanensis" pageId="13" pageNumber="14" rank="species" species="yucatanensis">M. yucatanensis</taxonomicName>
by i) three times larger body size; ii) significantly increased number of flagellum articles in both antennae (three times more articles on primary flagellum); iii) gnathopod I carpus 1.5-1.7 times longer than propodus (vs. same length); iv) proportionally longer and differently ornamented propodus of gnathopod II (palm armed with unnotched spine teeth and pearl row-like setae); v) pereopods VI and VII 130 % of body length (vs. 60 % of body length) vi) more distinct ventro-posterior corner of epimeral plates.
<taxonomicName lsidName="M. troglomorpha" pageId="13" pageNumber="14" rank="species" species="troglomorpha">M. troglomorpha</taxonomicName>
sp. n. differs from
<taxonomicName lsidName="M. cenoticola" pageId="13" pageNumber="14" rank="species" species="cenoticola">M. cenoticola</taxonomicName>
by i) its two times larger body size; ii) elevated number of flagellum articles in both antennae; iii); less narrow and differently ornamented propodus of gnathopod I (palm armed with distally notched spine teeth); iv) gnathopod I carpus 1.5-1.7 times longer than propodus (vs. 0.7 times longer); v) longer and differently ornamented propodus of gnathopod II; vi) pereopods VI and VII 130 % of body length (vs. approximately 60 % of body length); and vii) more distinct ventro-posterior corner of epimeral plates. Scanning electron microscopy has revealed that uropods
<normalizedToken originalValue="IIII">I-III</normalizedToken>
are covered with pubescent setae (not mentioned in the description of
<taxonomicName lsidName="M. yucatanensis" pageId="13" pageNumber="14" rank="species" species="yucatanensis">M. yucatanensis</taxonomicName>
and
<taxonomicName lsidName="M. cenoticola" pageId="13" pageNumber="14" rank="species" species="cenoticola">M. cenoticola</taxonomicName>
), this character should also be checked on these species using SEM studies, as this trait is not visible using light microscopy.
</paragraph>
<paragraph lastPageId="14" lastPageNumber="15" pageId="13" pageNumber="14">
The new species corresponds with the diagnostic characters of the genus
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia" order="Amphipoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">Mayaweckelia</taxonomicName>
. It differs from the related
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Tuluweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Tuluweckelia" order="Amphipoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">Tuluweckelia</taxonomicName>
in the following traits: i) anterior body region does not bend markedly downward; ii) maxilla I outer lobe with seven-nine setae; iii); gnathopod II sexually dimorphic; iv) epimeral plates ventro-posterior corners less
<pageBreakToken pageId="14" pageNumber="15" start="start">produced</pageBreakToken>
.
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Mayaweckelia</taxonomicName>
differs from
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Bahadzia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Bahadzia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Bahadzia</taxonomicName>
by i) the absense of palp from both mandibles; and ii) outer ramus of uropod III with one article (
<bibRefCitation author="Holsinger, JR" journalOrPublisher="Bijdragen tot de Dierkunde" pageId="19" pageNumber="20" pagination="283 - 294" title="A new genus and two new species of subterranean amphipod crustaceans (Hadziidae) from the Bahamas and Turks and Caicos Islands." volume="55" year="1985">Holsinger and Yager 1985</bibRefCitation>
,
<bibRefCitation author="Holsinger, JR" journalOrPublisher="Stygologia" pageId="20" pageNumber="21" pagination="85 - 105" title="Two new species of the subterranean Amphipod genus Bahadzia (Hadziidae) from the Yucatan Peninsula region of southern Mexico, with an analysis of phylogeny and biogeography of the genus." volume="7" year="1992">Holsinger 1992</bibRefCitation>
).
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mexiweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mexiweckelia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Mexiweckelia</taxonomicName>
Holsinger &amp; Minckley, 1971 and
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Paramexiweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Paramexiweckelia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Paramexiweckelia</taxonomicName>
Holsinger, 1982 are subterranean genera of the
<normalizedToken originalValue="weckeliid">'weckeliid'</normalizedToken>
group known from north of
<normalizedToken originalValue="México">Mexico</normalizedToken>
(e.g.,
<bibRefCitation author="Holsinger, JR" journalOrPublisher="Proceedings of the Biological Society of Washington" pageId="19" pageNumber="20" pagination="425 - 444" title="A new genus and two new species of subterranean amphipod crustaceans (Gammaridae) from Northern Mexico." volume="83" year="1971">Holsinger and Minckley 1971</bibRefCitation>
,
<bibRefCitation author="Holsinger, JR" journalOrPublisher="International Journal of Speleology" pageId="19" pageNumber="20" pagination="37 - 44" title="Paramexiweckelia, a new genus of subterranean amphipod crustacean (Hadziidae) from Northern Mexico." url="https://doi.org/10.5038/1827-806X.12.1.4" volume="12" year="1982">Holsinger 1982</bibRefCitation>
).
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Mayaweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Mayaweckelia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Mayaweckelia</taxonomicName>
differs from them in some important ways: i) accessory flagellum of first antenna three-articulated (vs. single or vestigial); ii) presence of robust setae on inner margin of maxilliped outer lobe; iii) presence of large, ventrally produced lobe on gnathopod I merus; iii) sexually dimorphic gnathopod II (of
<taxonomicName class="Malacostraca" family="Hadziidae" genus="Paramexiweckelia" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Paramexiweckelia" order="Amphipoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">Paramexiweckelia</taxonomicName>
is not dimorphic); iv) pereopod VI little longer than pereopod VII; and v) completely separated telson halves (vs. deeply incised but fused in the other two genera).
</paragraph>
</subSubSection>
</treatment>
</document>