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<mods:title id="6E9E085CA1C73F0C215C332AD0B09D9F">A Small Collection of Subtidal Crabs (Crustacea: Decapoda: Brachyura) from the Palau Islands Collected by Dredging</mods:title>
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<heading id="C84B3840FF9CFFA2F1E9CE0E5EE5F998" box="[711,1232,1581,1605]" centered="true" fontSize="36" level="2" pageId="25" pageNumber="32" reason="2">
Genus
<taxonomicName id="54BCF4AFFF9CFFA2F03ECE0E5EE5F998" ID-CoL="7PP7B" authority="Komai, Ng and Yamada, 2012" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[784,1232,1581,1605]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="25" pageNumber="32" phylum="Arthropoda" rank="genus">
<emphasis id="A1C8533EFF9CFFA2F03ECE0E59BBF998" bold="true" box="[784,910,1581,1605]" italics="true" pageId="25" pageNumber="32">Microtopsis</emphasis>
<bibRefCitation id="F72DF2DDFF9CFFA2F0BACE0E5EE5F998" author="Komai, T. &amp; P. K. L. Ng &amp; Y. Yamada" box="[916,1232,1581,1605]" pageId="25" pageNumber="32" pagination="137 - 154" refId="ref19348" refString="Komai, T., P. K. L. Ng and Y. Yamada 2012. A new genus and new species of chasmocarcinid crab (Decapoda, Brachyura, Goneplacoidea) from shallow waters in Japan. In Komatsu H., J. Okuno and K. Fukuoka (eds): Studies on Eumalacostraca: a homage to Masatsune Takeda. Crutaceana Monographs 17: 137 - 154." type="journal article" year="2012">Komai, Ng and Yamada, 2012</bibRefCitation>
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<taxonomicName id="54BCF4AFFF9CFFA2F1D8CE6C5E95F9BA" ID-CoL="438VR" authority="Ng and Castro, 2016" authorityName="Ng and Castro" authorityYear="2016" box="[758,1184,1615,1640]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="25" pageNumber="32" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9CFFA2F1D8CE6C598BF9BA" bold="true" box="[758,958,1615,1639]" italics="true" pageId="25" pageNumber="32">Microtopsis teschi</emphasis>
<bibRefCitation id="F72DF2DDFF9CFFA2F0EACE735E95F9BA" author="Ng, P. K. L. &amp; P. Castro" box="[964,1184,1615,1640]" pageId="25" pageNumber="32" pagination="1 - 182" refId="ref21359" refString="Ng, P. K. L. and P. Castro 2016. Revision of the family Chasmocarcinidae Serene, 1964 (Crustacea, Brachyura, Goneplacoidea). Zootaxa 4209: 1 - 182." type="journal article" year="2016">Ng and Castro, 2016</bibRefCitation>
</taxonomicName>
(
<figureCitation id="0B8793A9FF9CFFA2F051CE5559C2F951" box="[895,1015,1654,1676]" captionStart="Fig" captionStartId="24.[163,196,1389,1411]" captionTargetBox="[159,1217,215,1355]" captionTargetId="figure-128@24.[157,1218,213,1356]" captionTargetPageId="24" captionText="Fig. 12. AC: Typhlocarcinops decrescens Rathbun, ♀ (NSMT-Cr 30993; cb 8.6×cl 5.8mm) in different views. DG: Microtopsis teschi Ng and Castro, ♂ (NSMT-Cr 30995; cb 3.5×cl 2.9mm) (DE), and ♀ (NSMT-Cr 30996; 4.0×3.1 mm) (FG)." figureDoi="http://doi.org/10.5281/zenodo.13826472" httpUri="https://zenodo.org/record/13826472/files/figure.png" pageId="25" pageNumber="32">Figs. 12DG</figureCitation>
,
<figureCitation id="0B8793A9FF9CFFA2F72ECE545E22F950" box="[1024,1047,1655,1677]" captionStart="Fig" captionStartId="25.[163,196,1268,1290]" captionTargetBox="[215,1160,218,1235]" captionTargetId="figure-161@25.[215,1160,213,1235]" captionTargetPageId="25" captionText="Fig. 13. Microtopsis teschi Ng and Castro, ♂ (NSMT-Cr 30995; cb 3.5×cl 2.9 mm). Carapace (A), front-orbital region (B), left third maxilliped (C), left chela (D), right chela (E), right P4 (F), right P5 (G) and left G1 (H). Scales for ADE, BC, FG=1 mm, H=0.5mm." figureDoi="http://doi.org/10.5281/zenodo.13826476" httpUri="https://zenodo.org/record/13826476/files/figure.png" pageId="25" pageNumber="32">13</figureCitation>
)
<taxonomicName id="54BCF4AFFF9CFFA2F1EDCEB85E02F96D" ID-CoL="438VR" authority="Ng and Castro, 2016" authorityName="Ng and Castro" authorityYear="2016" box="[707,1079,1690,1712]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="25" pageNumber="32" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9CFFA2F1EDCEB8595EF972" box="[707,875,1690,1712]" italics="true" pageId="25" pageNumber="32">Microtopsis teschi</emphasis>
<bibRefCitation id="F72DF2DDFF9CFFA2F05DCEB85E02F96D" author="Ng, P. K. L. &amp; P. Castro" box="[883,1079,1690,1712]" pageId="25" pageNumber="32" pagination="1 - 182" refId="ref21359" refString="Ng, P. K. L. and P. Castro 2016. Revision of the family Chasmocarcinidae Serene, 1964 (Crustacea, Brachyura, Goneplacoidea). Zootaxa 4209: 1 - 182." type="journal article" year="2016">Ng and Castro, 2016</bibRefCitation>
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, pp. 85 (in key), 86, figs. 18BC, 80CF, 81GN.
</paragraph>
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<paragraph id="93038F2CFF9CFFA1F1F3CECC5842FE8A" blockId="25.[733,1235,1775,1799]" lastBlockId="26.[140,670,215,1418]" lastPageId="26" lastPageNumber="33" pageId="25" pageNumber="32">
<emphasis id="A1C8533EFF9CFFA2F1F3CECC5986F8DA" box="[733,947,1775,1799]" italics="true" pageId="25" pageNumber="32">Material examined.</emphasis>
<materialsCitation id="23D48571FF9CFFA1F0E3CED35842FE8A" collectingDate="1980-06-19" collectorName="Babelthuap I. &amp; K. Baba" country="Palau" elevation="45" lastPageId="26" lastPageNumber="33" location="Entrance" municipality="Toagel Mid in Arangel Channel" pageId="25" pageNumber="32" specimenCount="1">
<location id="9663D9F7FF9CFFA2F0E3CED35E19F8DA" LSID="urn:lsid:plazi:treatment:1B153E3AFF9CFFA1F1E9CE0E5BA3FA57:9663D9F7FF9CFFA2F0E3CED35E19F8DA" box="[973,1068,1776,1799]" country="Palau" municipality="Toagel Mid in Arangel Channel" name="Entrance" pageId="25" pageNumber="32">Entrance</location>
to
<collectingMunicipality id="73671556FF9CFFA1F77BCECC5B45FF32" lastPageId="26" lastPageNumber="33" pageId="25" pageNumber="32">Toagel Mid in Arangel Channel</collectingMunicipality>
,
<collectorName id="3E49EAFAFF9FFFA1F2ADC8F45828FF32" box="[387,541,215,239]" pageId="26" pageNumber="33">Babelthuap I.</collectorName>
,
<collectingCountry id="EBABCFBCFF9FFFA1F11CC8F45858FF32" box="[562,621,215,239]" name="Palau" pageId="26" pageNumber="33">Palau</collectingCountry>
Is., dredged,
<quantity id="544422C9FF9FFFA1F3C1C8D95B7FFECC" box="[239,330,250,274]" metricMagnitude="1" metricUnit="m" metricValue="4.5" metricValueMax="5.0" metricValueMin="4.0" pageId="26" pageNumber="33" unit="m" value="45.0" valueMax="50.0" valueMin="40.0">
<elevation id="1891681FFF9FFFA1F3C1C8D95B7FFECC" box="[239,330,250,274]" metricMagnitude="1" metricUnit="m" metricValue="4.5" metricValueMax="5.0" metricValueMin="4.0" pageId="26" pageNumber="33" unit="m" value="45.0" valueMax="50.0" valueMin="40.0">4050 m</elevation>
</quantity>
in depth, mud; 1♂ (cb 3.5×cl
<quantity id="544422C9FF9FFFA1F3A2C93E5AEBFEE8" box="[140,222,285,309]" metricMagnitude="-3" metricUnit="m" metricValue="2.9" pageId="26" pageNumber="33" unit="mm" value="2.9">2.9 mm</quantity>
), NSMT-Cr 30995, 1 ♀ (4.0×
<quantity id="544422C9FF9FFFA1F111C93E58A4FEE8" box="[575,657,285,309]" metricMagnitude="-3" metricUnit="m" metricValue="3.1" pageId="26" pageNumber="33" unit="mm" value="3.1">3.1 mm</quantity>
), NSMT-Cr 30996;
<date id="E702A9ECFF9FFFA1F260C9635BD2FE8A" box="[334,487,319,343]" pageId="26" pageNumber="33" value="1980-06-19">
<collectingDate id="F7465004FF9FFFA1F260C9635BD2FE8A" box="[334,487,319,343]" pageId="26" pageNumber="33" value="1980-06-19">June 19, 1980</collectingDate>
</date>
;
<collectorName id="3E49EAFAFF9FFFA1F2DFC963587CFE8A" box="[497,585,319,343]" pageId="26" pageNumber="33">K. Baba</collectorName>
leg.
</materialsCitation>
</paragraph>
<paragraph id="93038F2CFF9FFFA1F389C9415860FD08" blockId="26.[140,670,215,1418]" pageId="26" pageNumber="33">
<emphasis id="A1C8533EFF9FFFA1F389C9415B3FFEA7" box="[167,266,354,378]" italics="true" pageId="26" pageNumber="33">Remarks.</emphasis>
The genus
<taxonomicName id="54BCF4AFFF9FFFA1F2B9C9405826FEA7" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[407,531,355,378]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="genus">
<emphasis id="A1C8533EFF9FFFA1F2B9C9405826FEA7" box="[407,531,355,378]" italics="true" pageId="26" pageNumber="33">Microtopsis</emphasis>
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is composed of two species, the
<typeStatus id="4C07318EFF9FFFA1F2AFC9A65B9BFE40" box="[385,430,389,413]" pageId="26" pageNumber="33">type</typeStatus>
species,
<taxonomicName id="54BCF4AFFF9FFFA1F10CC9A65BEDFE62" authority="Komai, Ng and Yamada, 2012" authorityName="Komai, Ng and Yamada" authorityYear="2012" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">
<emphasis id="A1C8533EFF9FFFA1F10CC9A658A8FE40" box="[546,669,389,413]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
<bibRefCitation id="F72DF2DDFF9FFFA1F3A2C9845BEDFE62" author="Komai, T. &amp; P. K. L. Ng &amp; Y. Yamada" box="[140,472,423,448]" pageId="26" pageNumber="33" pagination="137 - 154" refId="ref19348" refString="Komai, T., P. K. L. Ng and Y. Yamada 2012. A new genus and new species of chasmocarcinid crab (Decapoda, Brachyura, Goneplacoidea) from shallow waters in Japan. In Komatsu H., J. Okuno and K. Fukuoka (eds): Studies on Eumalacostraca: a homage to Masatsune Takeda. Crutaceana Monographs 17: 137 - 154." type="journal article" year="2012">Komai, Ng and Yamada, 2012</bibRefCitation>
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, described on
<specimenCount id="85BA44A5FF9FFFA1F159C98B5A8AFE3F" count="1" pageId="26" pageNumber="33" type="male">one male</specimenCount>
and
<specimenCount id="85BA44A5FF9FFFA1F3DDC9E95B46FE3F" box="[243,371,458,482]" count="2" pageId="26" pageNumber="33" type="female">two females</specimenCount>
from Okinawa Island in the Ryukyu Islands,
<quantity id="544422C9FF9FFFA1F266C9CE5B94FDD9" box="[328,417,493,517]" metricMagnitude="1" metricUnit="m" metricValue="2.1" metricValueMax="3.0" metricValueMin="1.2" pageId="26" pageNumber="33" unit="m" value="21.0" valueMax="30.0" valueMin="12.0">1230m</quantity>
in depth, and another species,
<taxonomicName id="54BCF4AFFF9FFFA1F3C9CA335801FDFA" authority="Ng and Castro, 2016" authorityName="Ng and Castro" authorityYear="2016" box="[231,564,527,552]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9FFFA1F3C9CA335B7CFDFA" box="[231,329,527,551]" italics="true" pageId="26" pageNumber="33">M. teschi</emphasis>
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</taxonomicName>
, from the northwest of the Kei Islands,
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,
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in depth. They are remarkably small, with the carapace breadth
<quantity id="544422C9FF9FFFA1F230CA545BACFD52" box="[286,409,631,655]" metricMagnitude="-3" metricUnit="m" metricValue="3.35" metricValueMax="3.6" metricValueMin="3.1" pageId="26" pageNumber="33" unit="mm" value="3.35" valueMax="3.6" valueMin="3.1">3.13.6 mm</quantity>
in
<taxonomicName id="54BCF4AFFF9FFFA1F2EFCA5B5800FD52" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[449,565,631,655]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">
<emphasis id="A1C8533EFF9FFFA1F2EFCA5B5800FD52" box="[449,565,631,655]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
and
<quantity id="544422C9FF9FFFA1F141CA545AEDFD6C" metricMagnitude="-3" metricUnit="m" metricValue="2.0" metricValueMax="2.1" metricValueMin="1.9" pageId="26" pageNumber="33" unit="mm" value="2.0" valueMax="2.1" valueMin="1.9">1.9 2.1mm</quantity>
in
<taxonomicName id="54BCF4AFFF9FFFA1F22CCAB85B53FD6F" authorityName="Ng and Castro" authorityYear="2016" box="[258,358,666,690]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9FFFA1F22CCAB85B53FD6F" box="[258,358,666,690]" italics="true" pageId="26" pageNumber="33">M. teschi</emphasis>
</taxonomicName>
, but well described and figured by the original authors of both species.
</paragraph>
<paragraph id="93038F2CFF9FFFA1F389CAFC5856FB01" blockId="26.[140,670,215,1418]" pageId="26" pageNumber="33">
According to
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,
<taxonomicName id="54BCF4AFFF9FFFA1F117CAC358A8FD2A" authorityName="Ng and Castro" authorityYear="2016" box="[569,669,735,759]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9FFFA1F117CAC358A8FD2A" box="[569,669,735,759]" italics="true" pageId="26" pageNumber="33">M. teschi</emphasis>
</taxonomicName>
is distinguished from
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<emphasis id="A1C8533EFF9FFFA1F252CB205BC5FCC7" box="[380,496,770,794]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
by the features that the carapace dorsal surface is covered with small granules (rather smooth in
<taxonomicName id="54BCF4AFFF9FFFA1F2DCCB6B5851FC82" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[498,612,839,863]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">
<emphasis id="A1C8533EFF9FFFA1F2DCCB6B5851FC82" box="[498,612,839,863]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
), the anterior part of the carapace lateral margin is fringed with spiniform granules (small blunt granules in
<taxonomicName id="54BCF4AFFF9FFFA1F223CB935BB4FC1A" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[269,385,943,967]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">
<emphasis id="A1C8533EFF9FFFA1F223CB935BB4FC1A" box="[269,385,943,967]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
), the male telson is triangular in shape (rather semicircular in
<taxonomicName id="54BCF4AFFF9FFFA1F110CBF05A9BFBD0" authorityName="Komai, Ng and Yamada" authorityYear="2012" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">
<emphasis id="A1C8533EFF9FFFA1F110CBF05A9BFBD0" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
), the male sixth pleonite is proportionally broader than in
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<emphasis id="A1C8533EFF9FFFA1F211CC3B5B80FBF2" box="[319,437,1047,1071]" italics="true" pageId="26" pageNumber="33">M. takedai</emphasis>
</taxonomicName>
), and the G1 is proportionally longer, with the median twist more substrantial and the tip more hook-shaped than in
<emphasis id="A1C8533EFF9FFFA1F3A2CCA35B3CFB4A" box="[140,265,1151,1175]" italics="true" pageId="26" pageNumber="33">
<taxonomicName id="54BCF4AFFF9FFFA1F3A2CCA35B30FB4A" authorityName="Komai, Ng and Yamada" authorityYear="2012" box="[140,261,1151,1175]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="takedai">M. takedai</taxonomicName>
.
</emphasis>
The figures of the present specimen (
<figureCitation id="0B8793A9FF9FFFA1F3BACC815B17FB67" box="[148,290,1186,1210]" captionStart="Fig" captionStartId="24.[163,196,1389,1411]" captionTargetBox="[159,1217,215,1355]" captionTargetId="figure-128@24.[157,1218,213,1356]" captionTargetPageId="24" captionText="Fig. 12. AC: Typhlocarcinops decrescens Rathbun, ♀ (NSMT-Cr 30993; cb 8.6×cl 5.8mm) in different views. DG: Microtopsis teschi Ng and Castro, ♂ (NSMT-Cr 30995; cb 3.5×cl 2.9mm) (DE), and ♀ (NSMT-Cr 30996; 4.0×3.1 mm) (FG)." figureDoi="http://doi.org/10.5281/zenodo.13826472" httpUri="https://zenodo.org/record/13826472/files/figure.png" pageId="26" pageNumber="33">Figs. 12DG</figureCitation>
,
<figureCitation id="0B8793A9FF9FFFA1F200CC815B7CFB67" box="[302,329,1186,1210]" captionStart="Fig" captionStartId="25.[163,196,1268,1290]" captionTargetBox="[215,1160,218,1235]" captionTargetId="figure-161@25.[215,1160,213,1235]" captionTargetPageId="25" captionText="Fig. 13. Microtopsis teschi Ng and Castro, ♂ (NSMT-Cr 30995; cb 3.5×cl 2.9 mm). Carapace (A), front-orbital region (B), left third maxilliped (C), left chela (D), right chela (E), right P4 (F), right P5 (G) and left G1 (H). Scales for ADE, BC, FG=1 mm, H=0.5mm." figureDoi="http://doi.org/10.5281/zenodo.13826476" httpUri="https://zenodo.org/record/13826476/files/figure.png" pageId="26" pageNumber="33">13</figureCitation>
) agree well with the characters of
<taxonomicName id="54BCF4AFFF9FFFA1F387CCE65B3FFB00" authorityName="Ng and Castro" authorityYear="2016" box="[169,266,1221,1245]" class="Malacostraca" family="Chasmocarcinidae" genus="Microtopsis" kingdom="Animalia" order="Decapoda" pageId="26" pageNumber="33" phylum="Arthropoda" rank="species" species="teschi">
<emphasis id="A1C8533EFF9FFFA1F387CCE65B3FFB00" box="[169,266,1221,1245]" italics="true" pageId="26" pageNumber="33">M. teschi</emphasis>
</taxonomicName>
given by
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.
</paragraph>
<paragraph id="93038F2CFF9FFFA1F389CCC45BA3FA57" blockId="26.[140,670,215,1418]" pageId="26" pageNumber="33">
<emphasis id="A1C8533EFF9FFFA1F389CCC45B1CFB22" box="[167,297,1255,1279]" italics="true" pageId="26" pageNumber="33">Distribution</emphasis>
. As mentioned above, this species was originally reported from the northwest of the Kei Islands,
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,
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in depth. This is the second report of this small species, and new to the
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Islands.
</paragraph>
</subSubSection>
</treatment>
</document>