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<mods:title id="FA995810D659EC3ED915538511574615">New records of crabs (Decapoda: Brachyura) from the New Zealand region, including a new species of Rochinia A. Milne-Edwards, 1875 (Majidae), and a revision of the genus Dromia Weber, 1795 (Dromiidae)</mods:title>
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<treatment id="4F7B50567E63FFF2FF3013BB6DA80780" ID-DOI="http://doi.org/10.5281/zenodo.5321350" ID-Zenodo-Dep="5321350" LSID="urn:lsid:plazi:treatment:4F7B50567E63FFF2FF3013BB6DA80780" httpUri="http://treatment.plazi.org/id/4F7B50567E63FFF2FF3013BB6DA80780" lastPageId="14" lastPageNumber="15" pageId="13" pageNumber="14">
<subSubSection id="8FC8B2CB7E63FFF1FF3013BB6DBB02FC" pageId="13" pageNumber="14" type="nomenclature">
<paragraph id="C76DE1407E63FFF1FF3013BB6D7604A8" blockId="13.[151,562,693,719]" box="[151,562,693,719]" pageId="13" pageNumber="14">
<heading id="9C25562C7E63FFF1FF3013BB6D7604A8" bold="true" box="[151,562,693,719]" fontSize="11" level="1" pageId="13" pageNumber="14" reason="1">
<emphasis id="F5A63D527E63FFF1FF3013BB6D7604A8" bold="true" box="[151,562,693,719]" pageId="13" pageNumber="14">
<taxonomicName id="00D29AC37E63FFF1FF3013BB6ED004A8" ID-CoL="7NXLH" authority="Weber, 1795" authorityName="Weber" authorityYear="1795" box="[151,404,693,719]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus" sensu="stricto">
<emphasis id="F5A63D527E63FFF1FF3013BB6FB004A8" bold="true" box="[151,244,693,719]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
<bibRefCitation id="A3439CB17E63FFF1FF5C13BB6ED004A8" author="Weber, F." box="[251,404,693,719]" pageId="13" pageNumber="14" refId="ref37158" refString="Weber, F. (1795) Nomenclator entomologicus secundum Entomologiam Systematicam ill. Fabricii adjectis speciebus recens detectis et varietatibus. Chilonii &amp; Hamburgi. viii + 171 pp." type="book" year="1795">Weber, 1795</bibRefCitation>
</taxonomicName>
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<taxonomicNameLabel id="EE9580297E63FFF1FE3B13BB6D7604A8" box="[412,562,693,719]" pageId="13" pageNumber="14" sensu="stricto">sensu stricto</taxonomicNameLabel>
</emphasis>
</emphasis>
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</paragraph>
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<emphasis id="F5A63D527E63FFF1FF3013F06E53057F" bold="true" box="[151,279,766,792]" pageId="13" pageNumber="14">Definition</emphasis>
Carapace wider than long (1.2 1.4), surface sculptured. Rostrum tridentate, median tooth less than or equal in length to lateral teeth. Female sternal grooves normally end apart in pits between bases of P2. Cheliped with epipod. Sternite 4 T-shaped (inverted), episternites extend laterally between coxae of chelipeds, P2 to form cross-piece of “T”, stem of “T” formed by sternite narrowing anteriorly, tip truncate, ratio of distance across episternites to sternite length 1.00.9. Walking legs (P2P4) not knobbed or ridged. Length of propodi, dactyli of first two pairs of legs (P2, P3) usually equal, inner margins of dactyli armed with 57 small spines. P4 dactylus opposed by single propodal spine, no spine on the outer propodal margin. Fourth leg (P5) shorter than second (P3), dactylus usually opposed by two propodal spines, with another spine on the outer propodal margin. Margin of telson rounded. Uropod plates well developed, visible externally, used in male abdominal locking mechanism by fitting in front of serrated flanges on the bases of first legs (P2). Joint between last two abdominal somites freely movable.
</paragraph>
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<subSubSection id="8FC8B2CB7E63FFF2FF6215A96DA80780" lastPageId="14" lastPageNumber="15" pageId="13" pageNumber="14" type="discussion">
<paragraph id="C76DE1407E63FFF1FF6215A96B0900B8" blockId="13.[151,1436,766,2030]" pageId="13" pageNumber="14">
<emphasis id="F5A63D527E63FFF1FF6215A96E0602A6" bold="true" box="[197,322,1191,1217]" pageId="13" pageNumber="14">Remarks.</emphasis>
One of the enduring difficulties in deciding the limits of
<taxonomicName id="00D29AC37E63FFF1FBAC15A66B2C02A6" authorityName="Weber" authorityYear="1795" box="[1035,1128,1192,1217]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FBAC15A66B2C02A6" box="[1035,1128,1192,1217]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
</taxonomicName>
has been the importance attached to the female sternal groove character. These grooves, which mark the suture between sternite 7 and 8, are of more than passing interest because they encompass the apertures to the spermathecae and are intimately involved in copulation, sperm transfer and fertilization. They may be short so that the apertures are posterior to the female gonopores or long so that the apertures are anterior to the gonopores in the coxae of the second walking legs (P3). In addition the grooves may terminate wide apart or very close together. In the
<typeStatus id="18695FE27E63FFF1FACE14676ADF03E4" box="[1385,1435,1385,1411]" pageId="13" pageNumber="14">type</typeStatus>
species,
<taxonomicName id="00D29AC37E63FFF1FEA6149E6EA703CE" baseAuthorityName="Linnaeus" baseAuthorityYear="1758" box="[257,483,1424,1449]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="personata">
<emphasis id="F5A63D527E63FFF1FEA6149E6EA703CE" box="[257,483,1424,1449]" italics="true" pageId="13" pageNumber="14">Dromia personata</emphasis>
</taxonomicName>
, the sternal grooves are somewhat intermediate, ending apart in front of the gonopores, between the bases of the first pair of walking legs (P2). This condition is found in all the species currently included in the genus, except for
<taxonomicName id="00D29AC37E63FFF1FD3614D36C550391" authorityName="Forest" authorityYear="1974" box="[657,785,1501,1526]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="bollorei">
<emphasis id="F5A63D527E63FFF1FD3614D36C550391" box="[657,785,1501,1526]" italics="true" pageId="13" pageNumber="14">D. bollorei</emphasis>
</taxonomicName>
, in which the sternal grooves end close together in pits on an elevated protuberance between bases of the first walking legs (P2). However, sternite
<quantity id="002A4CA57E63FFF1FB6F170A6BB10079" box="[1224,1269,1540,1566]" metricMagnitude="-1" metricUnit="m" metricValue="1.016" pageId="13" pageNumber="14" unit="in" value="4.0">4 in</quantity>
this species is similar to that of the other
<taxonomicName id="00D29AC37E63FFF1FE4617256DE50022" box="[481,673,1579,1605]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="undetermined">
<emphasis id="F5A63D527E63FFF1FE4617256D790023" box="[481,573,1579,1604]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
species
</taxonomicName>
, having wing-like lateral projections between the coxae of the cheliped and first leg (P2). The only problem species is
<taxonomicName id="00D29AC37E63FFF1FCB8175F6CDE000D" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[799,922,1617,1642]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E63FFF1FCB8175F6CDE000D" box="[799,922,1617,1642]" italics="true" pageId="13" pageNumber="14">D. monodi</emphasis>
</taxonomicName>
, which has all the characters of
<taxonomicName id="00D29AC37E63FFF1FAA9175F6A2C000D" authorityName="Weber" authorityYear="1795" box="[1294,1384,1617,1642]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FAA9175F6A2C000D" box="[1294,1384,1617,1642]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
</taxonomicName>
, but whose body shape is remarkably similar to
<taxonomicName id="00D29AC37E63FFF1FD6317766B4D00F6" baseAuthorityName="Miers" baseAuthorityYear="1881" box="[708,1033,1656,1681]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="spinirostris">
<emphasis id="F5A63D527E63FFF1FD6317766B4D00F6" box="[708,1033,1656,1681]" italics="true" pageId="13" pageNumber="14">Sternodromia spinirostris</emphasis>
</taxonomicName>
.
<bibRefCitation id="A3439CB17E63FFF1FBBB17766B8300F5" author="Forest, J." box="[1052,1223,1656,1682]" pageId="13" pageNumber="14" pagination="71 - 123" refId="ref28727" refString="Forest, J. (1974) Les Dromies de l'Atlantique oriental. Description de Sternodromia gen. nov. et de deux especes nouvelles du genre Dromia Weber (Crustacea Decapoda Dromiidae). Annales del'Institut oc e anographique (Paris), 50 (l), 71 - 123." type="journal article" year="1974">Forest (1974)</bibRefCitation>
commented that immature specimens of
<taxonomicName id="00D29AC37E63FFF1FE0817916D6F00DF" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[431,555,1695,1720]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E63FFF1FE0817916D6F00DF" box="[431,555,1695,1720]" italics="true" pageId="13" pageNumber="14">D. monodi</emphasis>
</taxonomicName>
and
<taxonomicName id="00D29AC37E63FFF1FDC417916C4100DF" baseAuthorityName="Miers" baseAuthorityYear="1881" box="[611,773,1695,1720]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="spinirostris">
<emphasis id="F5A63D527E63FFF1FDC417916C4100DF" box="[611,773,1695,1720]" italics="true" pageId="13" pageNumber="14">S. spinirostris</emphasis>
</taxonomicName>
are difficult to separate so that
<bibRefCitation id="A3439CB17E63FFF1FBD217906AD800DF" author="Guinot, D. &amp; Tavares, M." box="[1141,1436,1694,1720]" pageId="13" pageNumber="14" pagination="43 - 129" refId="ref29563" refString="Guinot, D. &amp; Tavares, M. (2003) A new subfamilial arrangement for the Dromiidae de Haan, 1833, with diagnoses and descriptions of new genera and species (Crustacea, Decapoda, Brachyura). Zoosystema, 25 (1), 43 - 129." type="journal article" year="2003">Guinot &amp; Tavares (2003)</bibRefCitation>
transferred
<taxonomicName id="00D29AC37E63FFF1FEBA17CB6DA200B8" authority="Forest &amp; Guinot, 1966" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[285,742,1733,1759]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E63FFF1FEBA17CB6E9200B9" box="[285,470,1733,1758]" italics="true" pageId="13" pageNumber="14">Dromia monodi</emphasis>
<bibRefCitation id="A3439CB17E63FFF1FE7A17CB6DA200B8" author="Forest J. &amp; Guinot, D." box="[477,742,1733,1759]" pageId="13" pageNumber="14" pagination="23 - 124" refId="ref28780" refString="Forest J. &amp; Guinot, D. (1966) Campagne de la &quot; Calypso &quot; dans le Golfe de Guinee et aux iles Principe, Sao Tome et Annobon (1956). 16. Crustaces Brachyoures. In: Resultats scientifique Campagne &quot; Calypso &quot;, fasc. 7. Annales de l'Institut oceanographique (Paris), 44 (l), 23 - 124." type="journal article" year="1966">Forest &amp; Guinot, 1966</bibRefCitation>
</taxonomicName>
to
<taxonomicName id="00D29AC37E63FFF1FCAB17CB6B0C00B8" authority="Forest, 1974" authorityName="Forest" authorityYear="1974" box="[780,1096,1733,1759]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FCAB17CB6CEF00B9" box="[780,939,1733,1758]" italics="true" pageId="13" pageNumber="14">Sternodromia</emphasis>
<bibRefCitation id="A3439CB17E63FFF1FC1417CB6B0C00B8" author="Forest, J." box="[947,1096,1733,1759]" pageId="13" pageNumber="14" pagination="71 - 123" refId="ref28727" refString="Forest, J. (1974) Les Dromies de l'Atlantique oriental. Description de Sternodromia gen. nov. et de deux especes nouvelles du genre Dromia Weber (Crustacea Decapoda Dromiidae). Annales del'Institut oc e anographique (Paris), 50 (l), 71 - 123." type="journal article" year="1974">Forest, 1974</bibRefCitation>
</taxonomicName>
.
</paragraph>
<paragraph id="C76DE1407E63FFF2FF6217E26D4B072B" blockId="13.[151,1436,766,2030]" lastBlockId="14.[151,1436,152,487]" lastPageId="14" lastPageNumber="15" pageId="13" pageNumber="14">
<bibRefCitation id="A3439CB17E63FFF1FF6217E26E350161" author="McLay, C. L." box="[197,369,1772,1798]" pageId="13" pageNumber="14" pagination="111 - 251" refId="ref31531" refString="McLay, C. L. (1993) Crustacea Decapoda: The sponge crabs (Dromiidae) of New Caledonia and the Philippines with a review of the genera. In: Crosnier, A. (ed.), Resultats des Campagnes MUSORSTOM, vol. 10. Memoires du Museum national d'Histoire naturelle (Paris), 156, 111 - 251." type="journal article" year="1993">McLay (1993)</bibRefCitation>
synonymised
<taxonomicName id="00D29AC37E63FFF1FDBB17E26DF80162" authorityName="Forest" authorityYear="1974" box="[540,700,1772,1797]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FDBB17E26DF80162" box="[540,700,1772,1797]" italics="true" pageId="13" pageNumber="14">Sternodromia</emphasis>
</taxonomicName>
with
<taxonomicName id="00D29AC37E63FFF1FCA717E26C1E0162" authorityName="Weber" authorityYear="1795" box="[768,858,1772,1797]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FCA717E26C1E0162" box="[768,858,1772,1797]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
</taxonomicName>
because of the similarity of the modifications to the two camouflage-carrying limbs (last two pairs of legs, P4 and P5) as well as in body shape, and chose to overlook the sternal characters. This was ill-advised because we should regard the sternum as a more conservative feature than the arrangement of propodal spines on the carrying legs. The truncated sternite 4, the slit-like apertures of the spermathecae and sternal grooves terminating close together at the base of a large conical swelling between bases of first legs are sufficiently important as to warrant a separate genus. Also the abdominal locking mechanism in
<taxonomicName id="00D29AC37E63FFF1FD8D16DA6D89018A" baseAuthorityName="Miers" baseAuthorityYear="1881" box="[554,717,2004,2029]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="species" species="spinirostris">
<emphasis id="F5A63D527E63FFF1FD8D16DA6D89018A" box="[554,717,2004,2029]" italics="true" pageId="13" pageNumber="14">S. spinirostris</emphasis>
</taxonomicName>
differs from that typical of
<taxonomicName id="00D29AC37E63FFF1FBBD16DA6B30018A" authorityName="Weber" authorityYear="1795" box="[1050,1140,2004,2029]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="13" pageNumber="14" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E63FFF1FBBD16DA6B30018A" box="[1050,1140,2004,2029]" italics="true" pageId="13" pageNumber="14">Dromia</emphasis>
</taxonomicName>
: the uropods are smaller and the coxae, with which they engage, are only shallowly indented. The same argument applies to
<taxonomicName id="00D29AC37E60FFF2FA8711966AD806D6" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[1312,1436,152,177]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E60FFF2FA8711966AD806D6" box="[1312,1436,152,177]" italics="true" pageId="14" pageNumber="15">D. monodi</emphasis>
</taxonomicName>
and therefore this species should not be placed in
<taxonomicName id="00D29AC37E60FFF2FCBD11B16C8006BF" authorityName="Forest" authorityYear="1974" box="[794,964,191,216]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E60FFF2FCBD11B16C8006BF" box="[794,964,191,216]" italics="true" pageId="14" pageNumber="15">Sternodromia</emphasis>
</taxonomicName>
. Given the importance of the sternal characters it seems wiser to keep
<taxonomicName id="00D29AC37E60FFF2FD9511EB6DF60699" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[562,690,229,254]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E60FFF2FD9511EB6DF60699" box="[562,690,229,254]" italics="true" pageId="14" pageNumber="15">D. monodi</emphasis>
</taxonomicName>
in
<taxonomicName id="00D29AC37E60FFF2FD7C11EB6C730699" authorityName="Weber" authorityYear="1795" box="[731,823,229,254]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E60FFF2FD7C11EB6C730699" box="[731,823,229,254]" italics="true" pageId="14" pageNumber="15">Dromia</emphasis>
</taxonomicName>
and regard conformation of the carapace as being convergent. If we use sternal differences to justify
<taxonomicName id="00D29AC37E60FFF2FCB710026CF20742" authorityName="Forest" authorityYear="1974" box="[784,950,268,293]" class="Malacostraca" family="Dromiidae" genus="Sternodromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus">
<emphasis id="F5A63D527E60FFF2FCB710026CF20742" box="[784,950,268,293]" italics="true" pageId="14" pageNumber="15">Sternodromia</emphasis>
</taxonomicName>
as a genus, then we must use the same argument to exclude
<taxonomicName id="00D29AC37E60FFF2FE2A103C6D4D072C" authorityName="Forest &amp; Guinot" authorityYear="1966" box="[397,521,306,331]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="monodi">
<emphasis id="F5A63D527E60FFF2FE2A103C6D4D072C" box="[397,521,306,331]" italics="true" pageId="14" pageNumber="15">D. monodi</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="C76DE1407E60FFF2FF6210576DA80780" blockId="14.[151,1436,152,487]" pageId="14" pageNumber="15">
The following key for identifying the genera resulting from the revision of
<emphasis id="F5A63D527E60FFF2FBF210576A770715" box="[1109,1331,345,370]" italics="true" pageId="14" pageNumber="15">
<taxonomicName id="00D29AC37E60FFF2FBF210576BF40715" authorityName="Weber" authorityYear="1795" box="[1109,1200,345,370]" class="Malacostraca" family="Dromiidae" genus="Dromia" kingdom="Animalia" order="Decapoda" pageId="14" pageNumber="15" phylum="Arthropoda" rank="genus" sensu="lato">Dromia</taxonomicName>
<taxonomicNameLabel id="EE9580297E60FFF2FB1E10576A770715" box="[1209,1331,345,370]" pageId="14" pageNumber="15" sensu="lato">sensu lato</taxonomicNameLabel>
</emphasis>
uses the shape of the sternite 4 between the bases of the cheliped. This sternite is T-shaped with the episternites forming the top of the “T,” articulating with the cheliped coxae on each side, and the long axis of the “T” extending forward between the coxae of chelipeds.
</paragraph>
</subSubSection>
</treatment>
</document>