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<document id="A597DC7AB8A97BE994CCDEED285A1D88" ID-CLB-Dataset="7102" ID-DOI="10.11646/zootaxa.4939.1.1" ID-GBIF-Dataset="ee8e66ff-2f2c-47e2-978b-be52996d5b0f" ID-ISSN="1175-5326" ID-Zenodo-Dep="4580622" ID-ZooBank="F33F42D0-A139-4CE3-97D7-1314C12CF86B" IM.bibliography_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1614842897337" checkinUser="plazi" docAuthor="Conlan, Kathleen E., Desiderato, Andrea &amp; Beermann, Jan" docDate="2021" docId="03B487DAFF25D98AC9C81A5AFAEAFBCC" docLanguage="en" docName="zootaxa.4939.1.1.pdf" docOrigin="Zootaxa 4939 (1)" docStyle="DocumentStyle:5EBBA59367AD13919D70D935FA04F6A3.14:Zootaxa.2013-.monograph" docStyleId="5EBBA59367AD13919D70D935FA04F6A3" docStyleName="Zootaxa.2013-.monograph" docStyleVersion="14" docTitle="Jassa thurstoni Conlan 1990" docType="treatment" docVersion="9" lastPageNumber="147" masterDocId="FF8DFFA2FFB5D918C95F1B11FFF4FFF9" masterDocTitle="Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus" masterLastPageNumber="191" masterPageNumber="1" pageNumber="145" updateTime="1698932378003" updateUser="ExternalLinkService">
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<mods:title id="D5BA9E29889240050AD61E8F32A4FAF4">Jassa (Crustacea: Amphipoda): a new morphological and molecular assessment of the genus</mods:title>
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<mods:namePart id="DDE549CA61EEE581DC04BBE0879839A1">Conlan, Kathleen E.</mods:namePart>
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<mods:namePart id="6067D1A5D72201939B9A0D71BC36C232">Desiderato, Andrea</mods:namePart>
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<mods:namePart id="DD67AEA6B938EA43BD385BDEE391FA5D">Beermann, Jan</mods:namePart>
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<treatment id="03B487DAFF25D98AC9C81A5AFAEAFBCC" ID-DOI="http://doi.org/10.5281/zenodo.4580600" ID-GBIF-Taxon="181871917" ID-Zenodo-Dep="4580600" LSID="urn:lsid:plazi:treatment:03B487DAFF25D98AC9C81A5AFAEAFBCC" httpUri="http://treatment.plazi.org/id/03B487DAFF25D98AC9C81A5AFAEAFBCC" lastPageId="146" lastPageNumber="147" pageId="144" pageNumber="145">
<subSubSection id="C3076547FF25D988C9C81A5AFE62FE70" pageId="144" pageNumber="145" type="nomenclature">
<paragraph id="8BA236CCFF25D988C9C81A5AFE09FE9D" blockId="144.[151,509,330,393]" box="[151,509,330,357]" pageId="144" pageNumber="145">
<heading id="D0EA81A0FF25D988C9C81A5AFE09FE9D" bold="true" box="[151,509,330,357]" fontSize="11" level="2" pageId="144" pageNumber="145" reason="4">
<taxonomicName id="4C1D4D4FFF25D988C9C81A5AFE09FE9D" ID-CoL="3QN29" authority="Conlan, 1990" authorityName="Conlan" authorityYear="1990" box="[151,509,330,357]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="144" pageNumber="145" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF25D988C9C81A5AFE09FE9D" bold="true" box="[151,509,330,357]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9C81A5AFEA4FE9C" bold="true" box="[151,336,330,357]" italics="true" pageId="144" pageNumber="145">Jassathurstoni</emphasis>
<bibRefCitation id="EF8C4B3DFF25D988C8071A5BFE09FE9D" author="Conlan, K. E." box="[344,509,330,356]" pageId="144" pageNumber="145" pagination="2031 - 2075" refId="ref90850" refString="Conlan, K. E. (1990) Revision of the crustacean amphipod genus Jassa Leach (Corophioidea: Ischyroceridae). Canadian Journal of Zoology, 68, 2031 - 2075. https: // doi. org / 10.1139 / z 90 - 288" type="journal article" year="1990">Conlan, 1990</bibRefCitation>
</emphasis>
</taxonomicName>
</heading>
</paragraph>
<paragraph id="8BA236CCFF25D988C9C81A7EFE62FE70" blockId="144.[151,509,330,393]" box="[151,406,367,393]" pageId="144" pageNumber="145">
(
<tableCitation id="C69F0377FF25D988C9C01A7EFEF7FE70" box="[159,259,367,393]" captionStart="TABLE 13" captionStartId="136.[151,239,225,249]" captionTargetPageId="136" captionText="TABLE 13. Key character states of locally distributed Southern Hemisphere species. Trans-hemispheric species (Table 10) may occur there as well. X indicates the presence of the first character state described while — indicates the alternative character state given in italics. S and L indicate length.? indicates that the state is unknown. Character states apply to both sexes and juveniles unless indicated otherwise." httpUri="http://table.plazi.org/id/DF626644FF3DD990C9C81BF0FD37FE9C" pageId="144" pageNumber="145" tableUuid="DF626644FF3DD990C9C81BF0FD37FE9C">Table 13</tableCitation>
,
<figureCitation id="13262A49FF25D988C8501A7EFE7AFE70" box="[271,398,367,393]" captionStart-0="FIGURE 93" captionStart-1="FIGURE 94" captionStartId-0="144.[151,250,1634,1658]" captionStartId-1="145.[151,250,1856,1880]" captionTargetBox-0="[157,1429,671,1610]" captionTargetBox-1="[166,1424,181,1832]" captionTargetId-0="figure-153@144.[151,1436,669,1611]" captionTargetId-1="figure-18@145.[164,1424,181,1832]" captionTargetPageId-0="144" captionTargetPageId-1="145" captionText-0="FIGURE 93. Jassa thurstoni Conlan, 1990. Holotype, adult male, major form, 5.9 mm, NHM 1969:761:2. Paal Harbour, Signy Island, South Orkney Islands (60°43ʹS, 45°36ʹW), 5 February 1965, M. H. Thurston, coll., station 44 (1218).Anchor dredge over mud at 20–25 m depth (NHM).Adult male 1, major form, paratype, 6.0 mm, NMCC-1082. Observation Bluff, Outer Islet, Signy Island, South Orkney Islands (60°42ʹ30ʺS, 45°35ʹ10ʺW), 14 September 1965, M. H. Thurston, coll., station 52 (2085), Agassiz trawl over gravel and sand, sand with some rock, algae on rocks, 20 m depth, NHM 1969:763:1 donated to CMN, accession no. IZ 1989-013. Adult female, paratype, 6.5 mm, NHM 1969:762:3. Berntsen Point–Bare Rock, Signy Island, South Orkney Islands (60°42ʹ10ʺS, 45°35ʹ30ʺW), 16 October 1964, M. H. Thurston, coll., station 50 (AT 76). Agassiz trawl over gravel and sand, some rocks with Desmarestia anceps and Phyllogigas grandifolius, 5–10 m depth (NHM). Lateral view: whole body, antenna 1 and gnathopod magnifications; medial view: uropod 3. Setae omitted from the gnathopod 2 profiles except for those around the thumb and spines of the male 1 in order to landmark position changes with growth. Scale 0.1 mm. Illustration after Conlan (1990)." captionText-1="FIGURE 94. Jassa thurstoni Conlan, 1990. Adult male 1, major form, paratype, 6.0 mm, NMCC-1082. Observation Bluff, Outer Islet, Signy Island, South Orkney Islands (60°42ʹ30ʺS, 45°35ʹ10ʺW), 14 September 1965, M. H. Thurston, coll., station 52 (2085), Agassiz trawl over gravel and sand, sand with some rock, algae on rocks, 20 m depth, NHM 1969:763:1. IZ 1989-013 (CMN). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm." figureDoi-0="http://doi.org/10.5281/zenodo.4580858" figureDoi-1="http://doi.org/10.5281/zenodo.4580860" httpUri-0="https://zenodo.org/record/4580858/files/figure.png" httpUri-1="https://zenodo.org/record/4580860/files/figure.png" pageId="144" pageNumber="145">Figs 93–94</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C3076547FF25D98AC9C81AA7FDE5FD7C" lastPageId="146" lastPageNumber="147" pageId="144" pageNumber="145" type="diagnosis">
<paragraph id="8BA236CCFF25D988C9C81AA7FEE6FE29" blockId="144.[151,1436,438,646]" box="[151,274,438,464]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9C81AA7FEE6FE29" bold="true" box="[151,274,438,464]" pageId="144" pageNumber="145">Diagnosis.</emphasis>
</paragraph>
<paragraph id="8BA236CCFF25D988C9981ACAFEBAFE0C" blockId="144.[151,1436,438,646]" box="[199,334,475,501]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9981ACAFEBAFE0C" bold="true" box="[199,334,475,501]" pageId="144" pageNumber="145">Both sexes:</emphasis>
</paragraph>
<paragraph id="8BA236CCFF25D988C9981AEEFC42FDE0" blockId="144.[151,1436,438,646]" box="[199,950,511,537]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9981AEEFE72FDE0" box="[199,390,511,537]" italics="true" pageId="144" pageNumber="145">Mandibular palp</emphasis>
: article 2, dorsal margin without a fringe of setae.
</paragraph>
<paragraph id="8BA236CCFF25D988C9981932FC19FDC4" blockId="144.[151,1436,438,646]" box="[199,1005,547,573]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9981932FEC7FDC4" box="[199,307,547,573]" italics="true" pageId="144" pageNumber="145">Maxilla 1</emphasis>
: without a seta or setal cluster at the base of the palp article 1.
</paragraph>
<paragraph id="8BA236CCFF25D988C9981956FAD3FD7F" blockId="144.[151,1436,438,646]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9981956FEA8FD98" box="[199,348,583,609]" italics="true" pageId="144" pageNumber="145">Gnathopod 1</emphasis>
: basis, anterolateral margin with only a single short seta distally; carpus with a small cluster of moderately long setae at the anterodistal junction of the propodus (setae 25% of anterior margin length).
</paragraph>
<caption id="DF626644FF25D988C9C81D73FEC5F81A" ID-DOI="http://doi.org/10.5281/zenodo.4580858" ID-Zenodo-Dep="4580858" httpUri="https://zenodo.org/record/4580858/files/figure.png" pageId="144" pageNumber="145" startId="144.[151,250,1634,1658]" targetBox="[157,1429,671,1610]" targetPageId="144">
<paragraph id="8BA236CCFF25D988C9C81D73FEC5F81A" blockId="144.[151,1437,1634,2019]" pageId="144" pageNumber="145">
<emphasis id="B969EADEFF25D988C9C81D73FEEBF983" bold="true" box="[151,287,1634,1658]" pageId="144" pageNumber="145">FIGURE 93.</emphasis>
<taxonomicName id="4C1D4D4FFF25D988C87A1D72FDA4F982" authority="Conlan, 1990" authorityName="Conlan" authorityYear="1990" box="[293,592,1634,1659]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="144" pageNumber="145" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF25D988C87A1D72FE4BF983" box="[293,447,1634,1658]" italics="true" pageId="144" pageNumber="145">Jassa thurstoni</emphasis>
<bibRefCitation id="EF8C4B3DFF25D988C89B1D73FDA4F982" author="Conlan, K. E." box="[452,592,1634,1659]" pageId="144" pageNumber="145" pagination="2031 - 2075" refId="ref90850" refString="Conlan, K. E. (1990) Revision of the crustacean amphipod genus Jassa Leach (Corophioidea: Ischyroceridae). Canadian Journal of Zoology, 68, 2031 - 2075. https: // doi. org / 10.1139 / z 90 - 288" type="journal article" year="1990">Conlan, 1990</bibRefCitation>
</taxonomicName>
. Holotype, adult male, major form, 5.9 mm, NHM 1969:761:2. Paal Harbour, Signy Island, South Orkney Islands (60°43ʹS, 45°36ʹW), 5 February 1965, M. H. Thurston, coll., station 44 (1218). Anchor dredge over mud at 20–25 m depth (NHM). Adult male 1, major form, paratype, 6.0 mm, NMCC-1082. Observation Bluff, Outer Islet, Signy Island, South Orkney Islands (60°42ʹ30ʺS, 45°35ʹ10ʺW), 14 September 1965, M. H. Thurston, coll., station 52 (2085), Agassiz trawl over gravel and sand, sand with some rock, algae on rocks, 20 m depth, NHM 1969:763:1 donated to CMN, accession no. IZ 1989-013. Adult female, paratype, 6.5 mm, NHM 1969:762:3. Berntsen Point–Bare Rock, Signy Island, South Orkney Islands (60°42ʹ10ʺS, 45°35ʹ30ʺW), 16 October 1964, M. H. Thurston, coll., station 50 (AT 76). Agassiz trawl over gravel and sand, some rocks with
<taxonomicName id="4C1D4D4FFF25D988C8D71C4EFDA2F88F" box="[392,598,1887,1910]" class="Malacostraca" family="Idoteidae" genus="Desmarestia" higherTaxonomySource="CoL" kingdom="Animalia" order="Isopoda" pageId="144" pageNumber="145" phylum="Arthropoda" rank="species" species="anceps">
<emphasis id="B969EADEFF25D988C8D71C4EFDA2F88F" box="[392,598,1887,1910]" italics="true" pageId="144" pageNumber="145">Desmarestia anceps</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1D4D4FFF25D988CBD31C4FFC7EF88F" box="[652,906,1886,1910]" class="Phaeophyceae" family="Desmarestiaceae" genus="Phyllogigas" higherTaxonomySource="GBIF" kingdom="Chromista" order="Desmarestiales" pageId="144" pageNumber="145" phylum="Ochrophyta" rank="species" species="grandifolius">
<emphasis id="B969EADEFF25D988CBD31C4FFC7EF88F" box="[652,906,1886,1910]" italics="true" pageId="144" pageNumber="145">Phyllogigas grandifolius</emphasis>
</taxonomicName>
, 5–10 m depth (NHM). Lateral view: whole body, antenna 1 and gnathopod magnifications; medial view: uropod 3. Setae omitted from the gnathopod 2 profiles except for those around the thumb and spines of the male 1 in order to landmark position changes with growth. Scale 0.1 mm. Illustration after
<bibRefCitation id="EF8C4B3DFF25D988C9C81CDBFEDAF81A" author="Conlan, K. E." box="[151,302,1994,2019]" pageId="144" pageNumber="145" pagination="2031 - 2075" refId="ref90850" refString="Conlan, K. E. (1990) Revision of the crustacean amphipod genus Jassa Leach (Corophioidea: Ischyroceridae). Canadian Journal of Zoology, 68, 2031 - 2075. https: // doi. org / 10.1139 / z 90 - 288" type="journal article" year="1990">Conlan (1990)</bibRefCitation>
.
</paragraph>
</caption>
<caption id="DF626644FF24D989C9C81C51FB42F83A" ID-DOI="http://doi.org/10.5281/zenodo.4580860" ID-Zenodo-Dep="4580860" httpUri="https://zenodo.org/record/4580860/files/figure.png" pageId="145" pageNumber="146" startId="145.[151,250,1856,1880]" targetBox="[166,1424,181,1832]" targetPageId="145">
<paragraph id="8BA236CCFF24D989C9C81C51FB42F83A" blockId="145.[151,1437,1856,1988]" pageId="145" pageNumber="146">
<emphasis id="B969EADEFF24D989C9C81C51FED6F8A1" bold="true" box="[151,290,1856,1880]" pageId="145" pageNumber="146">FIGURE 94.</emphasis>
<taxonomicName id="4C1D4D4FFF24D989C8741C50FDAAF8A1" authority="Conlan, 1990" authorityName="Conlan" authorityYear="1990" box="[299,606,1856,1880]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="145" pageNumber="146" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF24D989C8741C50FE33F8A1" box="[299,455,1856,1880]" italics="true" pageId="145" pageNumber="146">Jassa thurstoni</emphasis>
<bibRefCitation id="EF8C4B3DFF24D989C8901C51FDAAF8A1" author="Conlan, K. E." box="[463,606,1856,1880]" pageId="145" pageNumber="146" pagination="2031 - 2075" refId="ref90850" refString="Conlan, K. E. (1990) Revision of the crustacean amphipod genus Jassa Leach (Corophioidea: Ischyroceridae). Canadian Journal of Zoology, 68, 2031 - 2075. https: // doi. org / 10.1139 / z 90 - 288" type="journal article" year="1990">Conlan, 1990</bibRefCitation>
</taxonomicName>
. Adult male 1, major form, paratype, 6.0 mm, NMCC-1082. Observation Bluff, Outer Islet, Signy Island, South Orkney Islands (60°42ʹ30ʺS, 45°35ʹ10ʺW), 14 September 1965, M. H. Thurston, coll., station 52 (2085), Agassiz trawl over gravel and sand, sand with some rock, algae on rocks, 20 m depth, NHM 1969:763:1. IZ 1989-013 (CMN). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.
</paragraph>
</caption>
<paragraph id="8BA236CCFF27D98AC9981B86FAEFFF2F" blockId="146.[151,1437,151,1077]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981B86FEADFF48" box="[199,345,151,177]" italics="true" pageId="146" pageNumber="147">Gnathopod 2</emphasis>
: basis with only a few minute setae along the anterolateral margin (setal lengths &lt;20% of the basis width); carpus and propodus, setae on the anterior margin short and simple (setal length &lt;basis width).
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981BCEFD09FF00" blockId="146.[151,1437,151,1077]" box="[199,765,223,249]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981BCEFE9BFF00" box="[199,367,223,249]" italics="true" pageId="146" pageNumber="147">Pereopods 5–7</emphasis>
: propodus not expanded anteriorly.
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981A12FB59FEE4" blockId="146.[151,1437,151,1077]" box="[199,1197,259,285]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981A12FEC6FEE4" box="[199,306,259,285]" italics="true" pageId="146" pageNumber="147">Uropod 1</emphasis>
: ventral peduncular spinous process underlying about 1/2 of the longest ramus.
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981A36FB64FEBB" blockId="146.[151,1437,151,1077]" box="[199,1168,295,322]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981A36FEC6FEB8" box="[199,306,295,321]" italics="true" pageId="146" pageNumber="147">Uropod 3</emphasis>
: inner ramus without spines mid-dorsally (with only the single apical spine).
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981A5AFB8CFE9C" blockId="146.[151,1437,151,1077]" box="[199,1144,331,357]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981A5AFEFBFE9C" box="[199,271,331,357]" italics="true" pageId="146" pageNumber="147">Telson</emphasis>
: tip without apical setae (only the usual short setae at each dorsolateral cusp).
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981A7EFE72FE70" blockId="146.[151,1437,151,1077]" box="[199,390,367,393]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981A7EFE72FE70" bold="true" box="[199,390,367,393]" pageId="146" pageNumber="147">Thumbed male:</emphasis>
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981A82FBEAFE54" blockId="146.[151,1437,151,1077]" box="[199,1054,402,429]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981A82FECEFE54" box="[199,314,403,429]" italics="true" pageId="146" pageNumber="147">Antenna 2</emphasis>
: without plumose setae on the flagellum and peduncular article 5.
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981AA6FD77FE0C" blockId="146.[151,1437,151,1077]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981AA6FEAEFE28" box="[199,346,439,465]" italics="true" pageId="146" pageNumber="147">Gnathopod 2</emphasis>
: propodus, palmar defining spines not produced on a ledge; dactyl expanded close to the junction with the propodus but not centrally toothed.
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981AEFFE9FFDE1" blockId="146.[151,1437,151,1077]" box="[199,363,510,536]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981AEFFE9FFDE1" bold="true" box="[199,363,510,536]" pageId="146" pageNumber="147">Adult female:</emphasis>
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981932FBF8FDC4" blockId="146.[151,1437,151,1077]" box="[199,1036,546,573]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981932FECCFDC4" box="[199,312,547,573]" italics="true" pageId="146" pageNumber="147">Antenna 2</emphasis>
: without plumose setae on the flagellum and peduncular article 5.
</paragraph>
<paragraph id="8BA236CCFF27D98AC9981956FDE5FD7C" blockId="146.[151,1437,151,1077]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC9981956FEADFD98" box="[199,345,583,609]" italics="true" pageId="146" pageNumber="147">Gnathopod 2</emphasis>
: propodus, palm sinuous; dactyl, inner margin evenly curved, tip fitting into depression between palmar angle and defining spines.
</paragraph>
</subSubSection>
<subSubSection id="C3076547FF27D98AC998199EFAEAFBCC" pageId="146" pageNumber="147" type="discussion">
<paragraph id="8BA236CCFF27D98AC998199EFEF8FCEC" blockId="146.[151,1437,151,1077]" pageId="146" pageNumber="147">
<emphasis id="B969EADEFF27D98AC998199EFECDFD50" bold="true" box="[199,313,655,681]" pageId="146" pageNumber="147">Remarks.</emphasis>
Only two thumbed males of
<taxonomicName id="4C1D4D4FFF27D98ACBDA199EFCF0FD50" authorityName="Conlan" authorityYear="1990" box="[645,772,655,681]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98ACBDA199EFCF0FD50" box="[645,772,655,681]" italics="true" pageId="146" pageNumber="147">J. thurstoni</emphasis>
</taxonomicName>
were available for study, both of which were major forms. Therefore, the appearance of the minor form is unknown.
<taxonomicName id="4C1D4D4FFF27D98ACA4319A2FC30FD34" authorityName="Conlan" authorityYear="1990" box="[796,964,691,717]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98ACA4319A2FC30FD34" box="[796,964,691,717]" italics="true" pageId="146" pageNumber="147">Jassa thurstoni</emphasis>
</taxonomicName>
is morphologically similar to
<taxonomicName id="4C1D4D4FFF27D98ACC4B19A2FA68FD34" authorityName="Vader &amp; Krapp" authorityYear="2005" box="[1300,1436,691,717]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="kjetilanna">
<emphasis id="B969EADEFF27D98ACC4B19A2FA68FD34" box="[1300,1436,691,717]" italics="true" pageId="146" pageNumber="147">J. kjetilanna</emphasis>
</taxonomicName>
and both have been collected in the
<collectingCountry id="F30A765CFF27D98ACB7B19C6FD29FD08" box="[548,733,727,753]" name="Falkland Islands" pageId="146" pageNumber="147">Falkland Islands</collectingCountry>
. Acomparison of the two species is given in the Remarks for
<taxonomicName id="4C1D4D4FFF27D98ACCD619C6FEF1FCEC" authorityName="Vader &amp; Krapp" authorityYear="2005" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="kjetilanna">
<emphasis id="B969EADEFF27D98ACCD619C6FEF1FCEC" italics="true" pageId="146" pageNumber="147">J. kjetilanna</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="8BA236CCFF27D98AC998180EFAEAFBCC" blockId="146.[151,1437,151,1077]" pageId="146" pageNumber="147">
Compared to the Southern Hemisphere
<taxonomicName id="4C1D4D4FFF27D98ACB24180EFD05FCC0" authorityName="Conlan" authorityYear="1990" box="[635,753,799,825]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="fenwicki">
<emphasis id="B969EADEFF27D98ACB24180EFD05FCC0" box="[635,753,799,825]" italics="true" pageId="146" pageNumber="147">J. fenwicki</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1D4D4FFF27D98ACA79180EFC7CFCC1" authorityName="Gnathopod" baseAuthorityName="Pfeffer" baseAuthorityYear="1888" box="[806,904,799,824]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="ingens">
<emphasis id="B969EADEFF27D98ACA79180EFC7CFCC1" box="[806,904,799,824]" italics="true" pageId="146" pageNumber="147">J. ingens</emphasis>
</taxonomicName>
,
<taxonomicName id="4C1D4D4FFF27D98ACACA180EFBC8FCC0" authorityName="Conlan" authorityYear="1990" box="[917,1084,799,825]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98ACACA180EFBC8FCC0" box="[917,1084,799,825]" italics="true" pageId="146" pageNumber="147">Jassa thurstoni</emphasis>
</taxonomicName>
has a slender antenna 2 without brush or plumose setae on the flagellum and the pereopods 5–7 are not modified for grasping. It also lacks the fringe of spine-like setae along the anterolateral margin of gnathopod 1, which is typical of the Southern Hemisphere species
<taxonomicName id="4C1D4D4FFF27D98ACCD61876FF0EFC5C" authorityName="Conlan" authorityYear="1990" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="alonsoae">
<emphasis id="B969EADEFF27D98ACCD61876FF0EFC5C" italics="true" pageId="146" pageNumber="147">J. alonsoae</emphasis>
</taxonomicName>
,
<taxonomicName id="4C1D4D4FFF27D98AC858189AFE8FFC5C" authorityName="Conlan" authorityYear="1990" box="[263,379,907,933]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="fenwicki">
<emphasis id="B969EADEFF27D98AC858189AFE8FFC5C" box="[263,379,907,933]" italics="true" pageId="146" pageNumber="147">J. fenwicki</emphasis>
</taxonomicName>
,
<taxonomicName id="4C1D4D4FFF27D98AC8D8189AFDD1FC5C" authorityName="Conlan" authorityYear="1990" box="[391,549,907,933]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="hartmannae">
<emphasis id="B969EADEFF27D98AC8D8189AFDD1FC5C" box="[391,549,907,933]" italics="true" pageId="146" pageNumber="147">J. hartmannae</emphasis>
</taxonomicName>
,
<taxonomicName id="4C1D4D4FFF27D98ACB6D189AFD66FC5D" authorityName="Gnathopod" baseAuthorityName="Pfeffer" baseAuthorityYear="1888" box="[562,658,907,932]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="ingens">
<emphasis id="B969EADEFF27D98ACB6D189AFD66FC5D" box="[562,658,907,932]" italics="true" pageId="146" pageNumber="147">J. ingens</emphasis>
</taxonomicName>
and
<taxonomicName id="4C1D4D4FFF27D98ACB9A189AFCF8FC5D" authorityName="Conlan" authorityYear="1990" box="[709,780,907,932]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="justi">
<emphasis id="B969EADEFF27D98ACB9A189AFCF8FC5D" box="[709,780,907,932]" italics="true" pageId="146" pageNumber="147">J. justi</emphasis>
</taxonomicName>
.Another Southern Hemisphere species that lacks the fringe,
<taxonomicName id="4C1D4D4FFF27D98AC9C818BEFEF7FC31" authorityName="Conlan" authorityYear="1990" box="[151,259,943,968]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="gruneri">
<emphasis id="B969EADEFF27D98AC9C818BEFEF7FC31" box="[151,259,943,968]" italics="true" pageId="146" pageNumber="147">J. gruneri</emphasis>
</taxonomicName>
, differs from
<taxonomicName id="4C1D4D4FFF27D98AC8C318BEFDEDFC30" authorityName="Conlan" authorityYear="1990" box="[412,537,943,969]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98AC8C318BEFDEDFC30" box="[412,537,943,969]" italics="true" pageId="146" pageNumber="147">J. thurstoni</emphasis>
</taxonomicName>
in lacking a seta or cluster of setae at the anterodistal junction of the gnathopod 1 carpus with the propodus, while
<taxonomicName id="4C1D4D4FFF27D98AC8A418C2FD8CFC14" authorityName="Conlan" authorityYear="1990" box="[507,632,979,1005]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98AC8A418C2FD8CFC14" box="[507,632,979,1005]" italics="true" pageId="146" pageNumber="147">J. thurstoni</emphasis>
</taxonomicName>
possesses a setal cluster there.
<taxonomicName id="4C1D4D4FFF27D98ACA9318C2FB97FC15" authorityName="Conlan" authorityYear="1990" box="[972,1123,979,1004]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="gruneri">
<emphasis id="B969EADEFF27D98ACA9318C2FB97FC15" box="[972,1123,979,1004]" italics="true" pageId="146" pageNumber="147">Jassa gruneri</emphasis>
</taxonomicName>
also possesses a short fringe of relatively long setae on the basis of gnathopod 2 while
<taxonomicName id="4C1D4D4FFF27D98ACA4D18E6FC7BFBE8" authorityName="Conlan" authorityYear="1990" box="[786,911,1015,1041]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98ACA4D18E6FC7BFBE8" box="[786,911,1015,1041]" italics="true" pageId="146" pageNumber="147">J. thurstoni</emphasis>
</taxonomicName>
lacks this fringe.
<taxonomicName id="4C1D4D4FFF27D98ACD0D18E6FB0DFBE8" authorityName="Conlan" authorityYear="1990" box="[1106,1273,1015,1041]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="thurstoni">
<emphasis id="B969EADEFF27D98ACD0D18E6FB0DFBE8" box="[1106,1273,1015,1041]" italics="true" pageId="146" pageNumber="147">Jassa thurstoni</emphasis>
</taxonomicName>
is only known from the Antarctic and sub-Antarctic islands while
<taxonomicName id="4C1D4D4FFF27D98ACB961F0AFCC2FBCD" authorityName="Conlan" authorityYear="1990" box="[713,822,1051,1076]" class="Malacostraca" family="Ischyroceridae" genus="Jassa" kingdom="Animalia" order="Amphipoda" pageId="146" pageNumber="147" phylum="Arthropoda" rank="species" species="gruneri">
<emphasis id="B969EADEFF27D98ACB961F0AFCC2FBCD" box="[713,822,1051,1076]" italics="true" pageId="146" pageNumber="147">J. gruneri</emphasis>
</taxonomicName>
is only known from
<collectingRegion id="49D9F82EFF27D98ACD451F0AFB77FBCC" box="[1050,1155,1051,1077]" country="Australia" name="Tasmania" pageId="146" pageNumber="147">Tasmania</collectingRegion>
(
<figureCitation id="13262A49FF27D98ACDCD1F0AFAE5FBCC" box="[1170,1297,1051,1077]" captionStart-0="FIGURE 11" captionStart-1="FIGURE 12" captionStartId-0="22.[151,250,1795,1819]" captionStartId-1="23.[151,250,1167,1191]" captionTargetBox-0="[151,1436,181,1771]" captionTargetBox-1="[151,1436,181,1126]" captionTargetId-0="figure-22@22.[151,1436,181,1771]" captionTargetId-1="figure-18@23.[151,1436,181,1126]" captionTargetPageId-0="22" captionTargetPageId-1="23" captionText-0="FIGURE 11. Records of Southern Hemisphere species of Jassa. Red dot: identification confirmed by specimen examination; green dot: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship." captionText-1="FIGURE 12. Records of Southern Hemisphere species of Jassa (continued). Red dot: identification confirmed by specimen examination; green dot: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship." figureDoi-0="http://doi.org/10.5281/zenodo.4580658" figureDoi-1="http://doi.org/10.5281/zenodo.4580660" httpUri-0="https://zenodo.org/record/4580658/files/figure.png" httpUri-1="https://zenodo.org/record/4580660/files/figure.png" pageId="146" pageNumber="147">Figs 11–12</figureCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>
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