<documentid="A24DE81E281D31078DE56C319B1491E9"ID-CLB-Dataset="299030"ID-DOI="10.5281/zenodo.12118323"ID-GBIF-Dataset="eaabd3c9-32aa-4916-8eda-25302e59d1f3"ID-ISSN="0026-279X"ID-Zenodo-Dep="12118323"IM.bibliography_approvedBy="julia"IM.illustrations_approvedBy="julia"IM.materialsCitations_approvedBy="julia"IM.metadata_approvedBy="julia"IM.tables_approvedBy="julia"IM.taxonomicNames_approvedBy="julia"IM.treatments_approvedBy="julia"checkinTime="1718741984707"checkinUser="felipe"docAuthor="Celia, Maria, Malay, D., Miller, Allison K. & Komai, Tomoyuki"docDate="2021"docId="03B74D7EFF9EAD4D468AFBBAA93FFC34"docLanguage="en"docName="Micronesica.2021.01.1-29.pdf"docOrigin="Micronesica 2021 (1)"docStyle="DocumentStyle:73477DD41873F4E732E2765E250AF97D.1:Micronesica.2013-.journal_article.type1"docStyleId="73477DD41873F4E732E2765E250AF97D"docStyleName="Micronesica.2013-.journal_article.type1"docStyleVersion="1"docTitle="Dardanus crassimanus"docType="treatment"docVersion="5"lastPageNumber="10"masterDocId="FF8E3506FF96AD444662FFE7AC3BFF98"masterDocTitle="Hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) of the Northern Marianas, including new records and an updated checklist"masterLastPageNumber="29"masterPageNumber="1"pageNumber="9"updateTime="1719507501249"updateUser="ExternalLinkService"zenodo-license-document="CC-BY-NC-ND-4.0">
<mods:titleid="F4B6DC80D88C80EF3ADBEB2C9ABCE82E">Hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) of the Northern Marianas, including new records and an updated checklist</mods:title>
<bibRefCitationid="EF8F8199FF9EAD4C444EFBBAAF18FBEF"author="Milne Edwards, H."box="[556,803,1117,1143]"pageId="8"pageNumber="9"pagination="257 - 288"refId="ref9894"refString="Milne Edwards, H. 1836. Observations zoologiques sur les Pagures et description d'un nouveau genre de la tribu des Paguriens. Annales des Sciences Naturelle Zoologie, Paris (2) 6: 257 - 288."type="journal article"year="1836">Milne Edwards 1836</bibRefCitation>
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),
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is usually identified on the basis of the distinctively tessellated margins on the lateral face of the left third pereopod propodus and dactyl, with a broad ridge on the propodus, a wide and deep sulcus traversing the propodus and dactyl, and a dense fringe of setae on the margins of the propodus and dactyl (
<bibRefCitationid="EF8F8199FF9EAD4C44D9F99FAFEFF90A"author="McLaughlin, P. A. & D. L. Rahayu & T. Komai & T. - Y. Chan"box="[699,980,1656,1682]"pageId="8"pageNumber="9"refId="ref9850"refString="McLaughlin, P. A., D. L. Rahayu, T. Komai, & T. - Y. Chan. 2007. A catalog of the hermit crabs (Paguroidea) of Taiwan. National Taiwan Ocean University."type="book"year="2007">McLaughlin et al. 2007</bibRefCitation>
). The species is similar to
<taxonomicNameid="4C1E87EBFF9EAD4C4364F99FAD0AF92C"baseAuthorityName="Rahayu & Wahyudi"baseAuthorityYear="2007"class="Malacostraca"family="Diogenidae"genus="Dardanus"higherTaxonomySource="CoL,GBIF"kingdom="Animalia"order="Decapoda"pageId="8"pageNumber="9"phylum="Arthropoda"rank="species"species="setifer">
<taxonomicNameid="4C1E87EBFF9EAD4C470DF97DADE6F92C"baseAuthorityName="Rahayu & Wahyudi"baseAuthorityYear="2007"box="[367,477,1690,1716]"class="Malacostraca"family="Diogenidae"genus="Dardanus"higherTaxonomySource="CoL,GBIF"kingdom="Animalia"order="Decapoda"pageId="8"pageNumber="9"phylum="Arthropoda"rank="species"species="setifer">
bears corneous-tipped spines on the ridge of the left third pereopod propodus and along each of the dorsal and ventral margin tessellations, characters lacking in
<taxonomicNameid="4C1E87EBFF9EAD4C42A6F95BAE2FF96F"authority="(McLaughlin et al. 2007)"baseAuthorityName="McLaughlin"baseAuthorityYear="2007"class="Malacostraca"family="Diogenidae"genus="Dardanus"higherTaxonomySource="CoL,GBIF"kingdom="Animalia"order="Decapoda"pageId="8"pageNumber="9"phylum="Arthropoda"rank="species"species="crassimanus">
<bibRefCitationid="EF8F8199FF9EAD4C4692F93AAE36F96F"author="McLaughlin, P. A. & D. L. Rahayu & T. Komai & T. - Y. Chan"box="[240,525,1757,1783]"pageId="8"pageNumber="9"refId="ref9850"refString="McLaughlin, P. A., D. L. Rahayu, T. Komai, & T. - Y. Chan. 2007. A catalog of the hermit crabs (Paguroidea) of Taiwan. National Taiwan Ocean University."type="book"year="2007">McLaughlin et al. 2007</bibRefCitation>
has long and dense setae on the left cheliped, while setae on the left cheliped are short and arranged in a rosette-like manner in
<taxonomicNameid="4C1E87EBFF9EAD4C42C1F918ADFDF8A3"authority="(Rahayu & Wahyudi 2007)"baseAuthorityName="Rahayu & Wahyudi"baseAuthorityYear="2007"class="Malacostraca"family="Diogenidae"genus="Dardanus"higherTaxonomySource="CoL,GBIF"kingdom="Animalia"order="Decapoda"pageId="8"pageNumber="9"phylum="Arthropoda"rank="species"species="setifer">
, which differs in having an elongate palm of the left cheliped covered in short, stiff setae (
<bibRefCitationid="EF8F8199FF9EAD4C4538F8A5A814F8C4"author="Malay, M. C. D. & D. L. Rahayu & T. - Y. Chan"box="[858,1071,1858,1884]"pageId="8"pageNumber="9"pagination="23 - 65"refId="ref9486"refString="Malay, M. C. D., D. L. Rahayu, & T. - Y. Chan. 2018. Hermit crabs of the genera Calcinus Dana, Clibanarius Dana, and Dardanus Paul'son from the PANGLAO 2004 Expedition, with description of a new species and a checklist of the hermit crabs of the Philippines (Crustacea: Anomura: Paguroidea). Raffles Bulletin of Zoology 66: 23 - 65."type="journal article"year="2018">Malay et al. 2018</bibRefCitation>
, however some differences were noted in the sculpturing and armature of the left third pereopod propodus and dactyl, particularly along the dorsal and ventral margin tessellations. In the Marianas specimens, the margins of the tessellations are sometimes less deeply incised and less regular in appearance than in
<bibRefCitationid="EF8F8199FF9FAD4D468AFE90AE35FE09"author="McLaughlin, P. A. & D. L. Rahayu & T. Komai & T. - Y. Chan"box="[232,526,375,401]"pageId="9"pageNumber="10"refId="ref9850"refString="McLaughlin, P. A., D. L. Rahayu, T. Komai, & T. - Y. Chan. 2007. A catalog of the hermit crabs (Paguroidea) of Taiwan. National Taiwan Ocean University."type="book"year="2007">McLaughlin et al. (2007)</bibRefCitation>
, or sometimes the tessellations resemble short projections that are separated from each other and bear strong spines. The mid-propodus ridge was also variable in development. Moreover, the cheliped is not as setose as in specimens from
<bibRefCitationid="EF8F8199FF9FAD4D42B4FE5DA94DFE4C"author="Miyake, S."box="[1238,1398,442,468]"pageId="9"pageNumber="10"refId="ref10011"refString="Miyake, S. 1978. The Crustacean Anomura of Sagami Bay. Biological Laboratory, Imperial Household, Tokyo. 200 pp. [in English], 161 pp. [in Japanese]."type="book"year="1978">Miyake 1978</bibRefCitation>
,
<bibRefCitationid="EF8F8199FF9FAD4D468AFE3BAD1DFE6E"author="Miyake, S."box="[232,294,476,502]"pageId="9"pageNumber="10"refId="ref10048"refString="Miyake, S. 1982. Japanese Crustacean Decapods and Stomatopods in Color. Vol. 1. Macrura, Anomura and Stomatopoda. Hoikusha, Osaka, 261 pp., 56 pls."type="book"year="1982">1982</bibRefCitation>
;
<bibRefCitationid="EF8F8199FF9FAD4D4755FE3BAE5BFE6E"author="McLaughlin, P. A. & D. L. Rahayu & T. Komai & T. - Y. Chan"box="[311,608,476,502]"pageId="9"pageNumber="10"refId="ref9850"refString="McLaughlin, P. A., D. L. Rahayu, T. Komai, & T. - Y. Chan. 2007. A catalog of the hermit crabs (Paguroidea) of Taiwan. National Taiwan Ocean University."type="book"year="2007">McLaughlin et al. 2007</bibRefCitation>
). A prominent fleshy protuberance between the third and fourth pleopods in adults of both male and female in
<bibRefCitationid="EF8F8199FF9FAD4D423DFE1AA932FD8F"author="Miyake, S."box="[1119,1289,509,535]"pageId="9"pageNumber="10"refId="ref10011"refString="Miyake, S. 1978. The Crustacean Anomura of Sagami Bay. Biological Laboratory, Imperial Household, Tokyo. 200 pp. [in English], 161 pp. [in Japanese]."type="book"year="1978">Miyake (1978</bibRefCitation>
: Japanese text, p. 59; 1982: 110). This structure was found in the Marianas specimens, however the degree of development varied from a short flap of chitinous membrane to a stout or elongate fleshy protuberance.
<bibRefCitationid="EF8F8199FF9FAD4D4342FD2FAD1DFC9B"author="Miyake, S."pageId="9"pageNumber="10"refId="ref10011"refString="Miyake, S. 1978. The Crustacean Anomura of Sagami Bay. Biological Laboratory, Imperial Household, Tokyo. 200 pp. [in English], 161 pp. [in Japanese]."type="book"year="1978">Miyake 1978</bibRefCitation>
;
<bibRefCitationid="EF8F8199FF9FAD4D4751FD0EAE76FC9B"author="McLaughlin, P. A. & D. L. Rahayu & T. Komai & T. - Y. Chan"box="[307,589,745,771]"pageId="9"pageNumber="10"refId="ref9850"refString="McLaughlin, P. A., D. L. Rahayu, T. Komai, & T. - Y. Chan. 2007. A catalog of the hermit crabs (Paguroidea) of Taiwan. National Taiwan Ocean University."type="book"year="2007">McLaughlin et al. 2007</bibRefCitation>
).
<bibRefCitationid="EF8F8199FF9FAD4D4403FD0EAF21FC9B"author="Wooster, D. S."box="[609,794,745,771]"pageId="9"pageNumber="10"refId="ref11234"refString="Wooster, D. S. 1979. The shallow-water hermit crabs of the Mariana Islands (Decapoda, Paguridea: Coenobitidae, Diogenidae, Paguridae). MS Biology Thesis, University of Guam."type="book"year="1979">Wooster (1979)</bibRefCitation>
reported two color variants in the Marianas, a light form and a dark form. He also noted, and we corroborate, that
<bibRefCitationid="EF8F8199FF9FAD4D4474FC97AEF7FC12"author="Stimpson, W."box="[534,716,880,906]"pageId="9"pageNumber="10"pagination="31 - 40"refId="ref11150"refString="Stimpson, W. 1858. Prodromus descriptionis animalium evertebratorum, quae in Expeditione ad Oceanum Pacificum Septentrionalem, a Republica Federata missa, Cadwaladaro Ringgold et Johanne Rodgers Ducibus, observavit et descripsit. Pars IV. Crustacea Cancroidea et Corystoidea. Proceedings of the Academy of Natural Sciences of Philadelphia 10: 31 - 40."type="journal article"year="1858">Stimpson 1858</bibRefCitation>
<bibRefCitationid="EF8F8199FF9FAD4D458EFC97A88EFC12"author="Hilgendorf, F."box="[1004,1205,880,906]"pageId="9"pageNumber="10"pagination="782 - 851"refId="ref8790"refString="Hilgendorf, F. 1879. Die von Hern. W. Peters in Mocambique gesammelten Crustaceen. Monatsbericht der Koniglich Preussichen Akademie der Wissenschaften zu Berlin 1878 (1879): 782 - 851."type="journal article"year="1879">Hilgendorf 1879</bibRefCitation>
</taxonomicName>
), combined with molecular work on topotypic material, will be needed to delineate the species boundaries.
