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<mods:title id="C70A9828C4F74A50DB2B83A4B43AF5BD">A review of the families and genera of the superfamily PLATYSCELOIDEA Bowman &amp; Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea), together with keys to the families, genera and species</mods:title>
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<subSubSection id="8AD7F7891860FFA9FF5EFE68FD61FE5C" box="[151,744,404,430]" pageId="42" pageNumber="43" type="nomenclature">
<paragraph id="C272A4021860FFA9FF5EFE68FD61FE5C" blockId="42.[151,744,404,430]" box="[151,744,404,430]" pageId="42" pageNumber="43">
<heading id="993A136E1860FFA9FF5EFE68FD61FE5C" bold="true" box="[151,744,404,430]" fontSize="11" level="1" pageId="42" pageNumber="43" reason="1">
<emphasis id="F0B978101860FFA9FF5EFE68FD61FE5C" bold="true" box="[151,744,404,430]" pageId="42" pageNumber="43">
Family
<taxonomicName id="05CDDF811860FFA9FF3FFE68FD61FE5C" ID-CoL="7NHM7" authority="Stephensen, 1923" authorityName="Stephensen" authorityYear="1923" box="[246,744,404,430]" class="Malacostraca" family="Brachyscelidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">
BRACHYSCELIDAE
<bibRefCitation id="A65CD9F31860FFA9FDDBFE68FD61FE5C" author="Stephensen" box="[530,744,404,430]" pageId="42" pageNumber="43" refString="Stephensen, K. (1923) Crustacea Malacostraca, V. (Amphipoda. 1) Danish Ingolf-Expedition, 3 (8), 1 - 100, + 2 tables, 1 map." type="book chapter" year="1923">Stephensen, 1923</bibRefCitation>
</taxonomicName>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="8AD7F7891860FFA9FF5EFE26FDC3FC19" pageId="42" pageNumber="43" type="diagnosis">
<paragraph id="C272A4021860FFA9FF5EFE26FECBFC35" blockId="42.[151,1437,474,1867]" pageId="42" pageNumber="43">
<emphasis id="F0B978101860FFA9FF5EFE26FE98FE01" bold="true" box="[151,273,474,499]" pageId="42" pageNumber="43">Diagnosis.</emphasis>
Body length up to
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, but usually about
<quantity id="053509E71860FFA9FCC4FE27FCD6FE00" box="[781,863,475,499]" metricMagnitude="-2" metricUnit="m" metricValue="1.0" pageId="42" pageNumber="43" unit="mm" value="10.0">10 mm</quantity>
. Head of females evenly rounded; of males usually slightly pointed antero-ventrally; as long as first 45 pereonites. Eyes large, occupying most of head surface. Coxae separate from pereonites. Antennae 1 of females with 2-articulate peduncle, and enlarged first flagellar article (callynophore), followed by two small terminal articles. Antennae 1 of males with 2-articulate peduncle, and enlarged, curved first flagellar article (callynophore), with two-field brush of aesthetascs medially, and three smaller, slender articles inserted on antero-distal corner. Antennae 2 absent in females. Antennae 2 of males with five slender articles folded back on one another, juncture of articles 2 &amp; 3 and 4 &amp; 5 supported in pocket of basis of G1. Mandibles with 3-articulate palp in males; absent in females. Maxillae 1 reduced to tiny, rounded lobes. Maxillae 2 extremely reduced, or most likely absent. Gnathopods 1 &amp; 2 distinctly chelate. Pereopod 5 the longest. Pereopods 5 &amp; 6 with greatly enlarged basis, slightly shorter than remaining articles combined, which are inserted terminally to basis. Pereopod 7 reduced in size, but with full complement of articles, with enlarged basis, which is longer than remaining articles combined. Uropoda all with articulated endopoda and exopoda. Telson triangular, usually extending to limit of U3, not fused with double urosomite. Gills with folds on pereonites 26. Oostegites on pereonites 25.
</paragraph>
<paragraph id="C272A4021860FFA9FF0EFC2EFDC3FC19" blockId="42.[151,1437,474,1867]" box="[199,586,978,1003]" pageId="42" pageNumber="43">
<emphasis id="F0B978101860FFA9FF0EFC2EFEAFFC19" bold="true" box="[199,294,978,1003]" pageId="42" pageNumber="43">Genera.</emphasis>
<taxonomicName id="05CDDF811860FFA9FEE4FC2EFDCFFC19" authority="Bate, 1861" authorityName="Bate" authorityYear="1861" box="[301,582,978,1003]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FEE4FC2EFE4BFC19" box="[301,450,978,1003]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
<bibRefCitation id="A65CD9F31860FFA9FE03FC2FFDCFFC19" author="Bate" box="[458,582,978,1003]" pageId="42" pageNumber="43" refString="Bate, C. S. (1861) On the morphology of some Amphipoda of the Division Hyperina. Annals and Magazine of Natural History, series 3, 8 (43), 1 - 16, plates 1 - 2." type="journal article" year="1861">Bate, 1861</bibRefCitation>
</taxonomicName>
.
</paragraph>
</subSubSection>
<subSubSection id="8AD7F7891860FFA9FF0EFC0AFA9FF8B9" pageId="42" pageNumber="43" type="discussion">
<paragraph id="C272A4021860FFA9FF0EFC0AFB53FB15" blockId="42.[151,1437,474,1867]" pageId="42" pageNumber="43">
<emphasis id="F0B978101860FFA9FF0EFC0AFEB2FBFD" bold="true" box="[199,315,1014,1039]" pageId="42" pageNumber="43">Remarks.</emphasis>
<bibRefCitation id="A65CD9F31860FFA9FE80FC0AFD86FBFD" author="Bovallius" box="[329,527,1014,1039]" pageId="42" pageNumber="43" refString="Bovallius, C. (1890) The Oxycephalids. Nova Acta Regiae Societatis Scientiarum Upsaliensis, series iii, 14, 1 - 141, plates 1 - 7." type="journal article" year="1890">Bovallius (1890)</bibRefCitation>
, in a footnote (p18 &amp; 19), divided the old family Tryphaenidae into two;
<taxonomicName id="05CDDF811860FFA9FF5EFBE6FE80FBC1" box="[151,265,1050,1075]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
(for
<taxonomicName id="05CDDF811860FFA9FE9FFBE0FE2FFBC1" box="[342,422,1052,1075]" class="Malacostraca" family="Lycaeidae" genus="Lycaea" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FE9FFBE0FE2FFBC1" box="[342,422,1052,1075]" italics="true" pageId="42" pageNumber="43">Lycaea</emphasis>
</taxonomicName>
) and Euthamneidae (for
<taxonomicName id="05CDDF811860FFA9FD20FBE6FCF7FBC1" box="[745,894,1050,1075]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FD20FBE6FCF7FBC1" box="[745,894,1050,1075]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
</taxonomicName>
and
<taxonomicName id="05CDDF811860FFA9FC03FBE6FBB4FBC1" box="[970,1085,1050,1075]" class="Malacostraca" family="Lycaeidae" genus="Thamneus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FC03FBE6FBB4FBC1" box="[970,1085,1050,1075]" italics="true" pageId="42" pageNumber="43">Thamneus</emphasis>
</taxonomicName>
) and changed
<taxonomicName id="05CDDF811860FFA9FAC8FBE6FAFDFBC1" box="[1281,1396,1050,1075]" class="Malacostraca" family="Lycaeidae" genus="Thamneus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FAC8FBE6FAFDFBC1" box="[1281,1396,1050,1075]" italics="true" pageId="42" pageNumber="43">Thamneus</emphasis>
</taxonomicName>
to
<taxonomicName id="05CDDF811860FFA9FF5EFBC2FEABFBA5" box="[151,290,1086,1111]" class="Malacostraca" family="Lycaeidae" genus="Euthamneus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FF5EFBC2FEABFBA5" box="[151,290,1086,1111]" italics="true" pageId="42" pageNumber="43">Euthamneus</emphasis>
</taxonomicName>
to avoid confusion, and fit with the new family name. However,
<bibRefCitation id="A65CD9F31860FFA9FBE7FBC2FA8AFBA5" author="Stephensen" box="[1070,1283,1086,1111]" pageId="42" pageNumber="43" refString="Stephensen, K. (1932) The Tanaidacea and Amphipoda of the Arctic. Fauna Arctica, 6, 343 - 378." type="journal article" year="1932">Stephensen (1932)</bibRefCitation>
quite rightly points out that
<taxonomicName id="05CDDF811860FFA9FEF7FB9EFE5AFB89" box="[318,467,1122,1147]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FEF7FB9EFE5AFB89" box="[318,467,1122,1147]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
</taxonomicName>
is the older generic name, and “the family must be named after the older genus and so be called
<taxonomicName id="05CDDF811860FFA9FEDCFB7AFE4FFB6D" box="[277,454,1158,1183]" class="Malacostraca" family="Brachyscelidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Brachyscelidae</taxonomicName>
”. Not all subsequent authors have accepted this arrangement and have restored
<taxonomicName id="05CDDF811860FFA9FF5EFB56FEA5FB31" box="[151,300,1194,1219]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FF5EFB56FEA5FB31" box="[151,300,1194,1219]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
</taxonomicName>
and
<taxonomicName id="05CDDF811860FFA9FEA1FB56FE52FB31" box="[360,475,1194,1219]" class="Malacostraca" family="Lycaeidae" genus="Thamneus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FEA1FB56FE52FB31" box="[360,475,1194,1219]" italics="true" pageId="42" pageNumber="43">Thamneus</emphasis>
</taxonomicName>
to the family
<taxonomicName id="05CDDF811860FFA9FD4AFB56FD7CFB31" box="[643,757,1194,1219]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
(e.g.
<bibRefCitation id="A65CD9F31860FFA9FCF3FB57FBD5FB31" author="Bowman" box="[826,1116,1195,1219]" pageId="42" pageNumber="43" refString="Bowman, T. E. &amp; Gruner, H. - E. (1973) The families and genera of Hyperiidea (Crustacea: Amphipoda). Smithsonian Contributions to Zoology, No. 146, 1 - 64. http: // dx. doi. org / 10.5479 / si. 00810282.146" type="book chapter" year="1973">Bowman &amp; Gruner 1973</bibRefCitation>
,
<bibRefCitation id="A65CD9F31860FFA9FBA3FB56FACFFB31" author="Shih" box="[1130,1350,1194,1219]" pageId="42" pageNumber="43" refString="Shih, C. - T. &amp; Chen, Q. - C. (1995) Zooplankton of China Seas (2) - The Hyperiidea (Crustacea: Amphipoda). China Ocean Press, Beijing, 295 pp." type="book" year="1995">Shih &amp; Chen 1995</bibRefCitation>
), while others support the recognition of
<taxonomicName id="05CDDF811860FFA9FDC2FB32FD3FFB15" box="[523,694,1230,1255]" class="Malacostraca" family="Brachyscelidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Brachyscelidae</taxonomicName>
(e.g.
<bibRefCitation id="A65CD9F31860FFA9FD3FFB32FC72FB15" author="Vinogradov" box="[758,1019,1230,1255]" pageId="42" pageNumber="43" refString="Vinogradov, M. E., Volkov, A. F. &amp; Semenova, T. N. (1982) Amfipody-Giperiidy (Amphipoda: Hyperiidea) Mirovogo Okeanea. Akademiya Nauk SSSR, Opredeliteli po Faune SSSR No. 132. Leningrad, 492 pp. [In Russian, English translation, 1996, Smithsonian Institution Libraries, Washington D. C., D. Siegel-Causey, Scientific Editor]." type="book" year="1982">
Vinogradov
<emphasis id="F0B978101860FFA9FC48FB33FC3BFB15" box="[897,946,1230,1255]" italics="true" pageId="42" pageNumber="43">et al</emphasis>
. 1982
</bibRefCitation>
,
<bibRefCitation id="A65CD9F31860FFA9FBCFFB32FB47FB15" author="Vinogradov" box="[1030,1230,1230,1255]" pageId="42" pageNumber="43" refString="Vinogradov, G. M. (1999) Amphipoda, pp. 1141 - 1240. In: Boltovskoy, D. (Ed.), South Atlantic Zooplankton. Vol. 2. Backhuys, Leiden, The Netherlands, 1705 pp." type="book chapter" year="1999">Vinogradov 1999</bibRefCitation>
).
</paragraph>
<paragraph id="C272A4021860FFA9FF0EFB0FFA8CF8F1" blockId="42.[151,1437,474,1867]" pageId="42" pageNumber="43">
In this review the family
<taxonomicName id="05CDDF811860FFA9FDC5FB0EFD3EFAF9" box="[524,695,1266,1291]" class="Malacostraca" family="Brachyscelidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Brachyscelidae</taxonomicName>
is maintained for the genus
<taxonomicName id="05CDDF811860FFA9FBEEFB0EFB35FAF9" box="[1063,1212,1266,1291]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FBEEFB0EFB35FAF9" box="[1063,1212,1266,1291]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
</taxonomicName>
because it differs significantly from the family
<taxonomicName id="05CDDF811860FFA9FE2BFAEAFDDAFADD" box="[482,595,1302,1327]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
in a number of characters as follows. The head of males is usually pointed (round in
<taxonomicName id="05CDDF811860FFA9FECFFAC0FEDFFAA1" box="[262,342,1340,1363]" class="Malacostraca" family="Lycaeidae" genus="Lycaea" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FECFFAC0FEDFFAA1" box="[262,342,1340,1363]" italics="true" pageId="42" pageNumber="43">Lycaea</emphasis>
</taxonomicName>
and only slightly pointed in
<taxonomicName id="05CDDF811860FFA9FD55FAC6FCD9FAA1" box="[668,848,1338,1363]" class="Malacostraca" family="Oxycephalidae" genus="Simorhynchotus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FD55FAC6FCD9FAA1" box="[668,848,1338,1363]" italics="true" pageId="42" pageNumber="43">Simorhynchotus</emphasis>
</taxonomicName>
); the second antennae of males have the juncture of articles 2 &amp; 3 and 4 &amp; 5 supported in a pocket of the basis of gnathopod 1 (absent in
<taxonomicName id="05CDDF811860FFA9FB5CFAA2FA85FA85" box="[1173,1292,1374,1399]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
); the second antennae of males consist of a relatively long basal article, followed by three slightly longer articles, and one shorter one, all folded back on one another, the terminal one being about one-quarter as long as the preceding one, and orientated anteriorly (in
<taxonomicName id="05CDDF811860FFA9FE1EFA36FDC0FA11" box="[471,585,1482,1507]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
the basal article is only about one-third as long as the following article, and the terminal article is minute, is not folded, and is orientated posteriorly); the basis of pereopods 5 &amp; 6 is closer to becoming operculiform, and in pereopod 6 the terminal articles are inserted sub-terminally on the basis; the endopoda and exopoda of the uropoda are not fused with the peduncle, and the telson is not fused with the double urosomite. In addition, newly hatched juveniles of
<taxonomicName id="05CDDF811860FFA9FD07F9A0FCEBF981" box="[718,866,1626,1651]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="species" species="crusculum">
<emphasis id="F0B978101860FFA9FD07F9A0FCEBF981" box="[718,866,1626,1651]" italics="true" pageId="42" pageNumber="43">B. crusculum</emphasis>
</taxonomicName>
have specialised appendages that differ from those of the adult. In particular, pereopod 5 is chelate, while in the adult it is simple.
<taxonomicName id="05CDDF811860FFA9FBF6F983FB06F964" box="[1087,1167,1663,1686]" class="Malacostraca" family="Lycaeidae" genus="Lycaea" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FBF6F983FB06F964" box="[1087,1167,1663,1686]" italics="true" pageId="42" pageNumber="43">Lycaea</emphasis>
</taxonomicName>
lacks these specialised appendages, thus supporting the familial status for
<taxonomicName id="05CDDF811860FFA9FD14F95EFBB1F949" authority="Harbison 1976" authorityName="Harbison" authorityYear="1976" box="[733,1080,1698,1723]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FD14F95EFCFBF949" box="[733,882,1698,1723]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
(Harbison 1976)
</taxonomicName>
. Some of the above characters, such as the morphology of the male head and the pereopoda, are intermediate between the families
<taxonomicName id="05CDDF811860FFA9FB32F93AFAE4F92D" box="[1275,1389,1734,1759]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
and
<taxonomicName id="05CDDF811860FFA9FF5EF916FECAF8F1" box="[151,323,1770,1795]" class="Malacostraca" family="Oxycephalidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Oxycephalidae</taxonomicName>
. The morphology of the maxillae are also like those of
<taxonomicName id="05CDDF811860FFA9FC64F916FB96F8F1" box="[941,1055,1770,1795]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
and
<taxonomicName id="05CDDF811860FFA9FB9CF916FA88F8F1" box="[1109,1281,1770,1795]" class="Malacostraca" family="Oxycephalidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Oxycephalidae</taxonomicName>
.
</paragraph>
<paragraph id="C272A4021860FFA9FF0EF8F2FA9FF8B9" blockId="42.[151,1437,474,1867]" pageId="42" pageNumber="43">
Prior to this review this family included
<taxonomicName id="05CDDF811860FFA9FD50F8F2FC85F8D5" box="[665,780,1806,1831]" class="Malacostraca" family="Lycaeidae" genus="Thamneus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FD50F8F2FC85F8D5" box="[665,780,1806,1831]" italics="true" pageId="42" pageNumber="43">Thamneus</emphasis>
</taxonomicName>
which has been removed to the new family, Thamneidae
<emphasis id="F0B978101860FFA9FF5EF8CEFE8DF8B9" bold="true" box="[151,260,1842,1867]" pageId="42" pageNumber="43">fam. nov.</emphasis>
, because it has characters that are unique and inconsistent with
<taxonomicName id="05CDDF811860FFA9FC19F8CEFBECF8B9" box="[976,1125,1842,1867]" class="Malacostraca" family="Lycaeidae" genus="Brachyscelus" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="genus">
<emphasis id="F0B978101860FFA9FC19F8CEFBECF8B9" box="[976,1125,1842,1867]" italics="true" pageId="42" pageNumber="43">Brachyscelus</emphasis>
</taxonomicName>
(or
<taxonomicName id="05CDDF811860FFA9FB5AF8CEFA83F8B9" box="[1171,1290,1842,1867]" class="Malacostraca" family="Lycaeidae" kingdom="Animalia" order="Amphipoda" pageId="42" pageNumber="43" phylum="Arthropoda" rank="family">Lycaeidae</taxonomicName>
).
</paragraph>
</subSubSection>
</treatment>
</document>