Hexapus

{{Short description|Genus of crabs}} {{For|the six-legged octopus|Henry the Hexapus}} {{automatic taxobox | fossil_range = {{fossil_range|Lutetian|Recent}} | taxon=Hexapus | authority = De Haan, 1833 | type_species= ''Cancer sexpes'' | type_species_authority=Fabricius, 1798 | subdivision_ranks = Species | subdivision = See text }}

'''''Hexapus''''' is a genus of crabs in the family Hexapodidae. It contains only three extant species found in the Indo-West Pacific. They inhabit the intertidal and subtidal areas of shorelines.

==Description== {{main|Hexapodidae}} Like other members of the family, these crabs are easily recognizable due to the complete absence of the last pair of walking legs (pereiopods). They thus only have six walking legs (excluding the claws), unlike the usual eight. Their carapace is subquadrate, wider than it is long, with a rounded anterior.<ref name="rahayu2014">{{cite journal|author1=Dwi Listyo Rahayu|author2=Peter K. L. Ng|year=2014|title=New genera and new species of Hexapodidae (Crustacea, Brachyura) from the Indo-West Pacific and east Atlantic|journal=Raffles Bulletin of Zoology|volume=62|pages=396–483|url=http://lkcnhm.nus.edu.sg/nus/images/data/raffles_bulletin_of_zoology/zoology_volume_62/62rbz396-483.pdf|access-date=2014-12-15|archive-url=https://web.archive.org/web/20141215214051/http://lkcnhm.nus.edu.sg/nus/images/data/raffles_bulletin_of_zoology/zoology_volume_62/62rbz396-483.pdf|archive-date=2014-12-15|url-status=dead}}</ref>

==Species== The following are the species classified under ''Hexapus''.<ref name="rahayu2014"/> :Species marked with {{extinct}} are extinct

===Extant species=== *''Hexapus bidentatus'' Velip & Rivonker, 2014 ::Found in Goa, India<ref name="velip">{{cite journal |author1=Dinesh T. Velip |author2=Chandrashekher U. Rivonker |year=2014 |title=''Hexapus bidentatus'' sp. nov. (Crustacea: Decapoda: Brachyura: Hexapodidae), a new species from Goa, west coast of India |journal=Marine Biology Research |volume=11 |issue=1 |pages=97–105 |doi=10.1080/17451000.2014.889305 |s2cid=83647412 }}</ref> *''Hexapus sexpes'' (Fabricius, 1798) ::Found from Cochin, southwest India to Phuket, Thailand and the Penang Strait of Malaysia *''Hexapus timika'' Rahayu & Ng, 2014 ::Found in Timika, Papua, Indonesia

===Fossil species=== *{{extinct}}''Hexapus decapoda'' (Morris & Collins, 1991) ::Originally described as ''Prepaeduma decapoda''. From Sarawak, Borneo, Malaysia (Miri Formation, Pliocene)<ref name="schweitzer">{{cite journal |author1=S. F. Morris |author2=J. S. H. Collins |year=1991 |title=Neogene crabs from Brunei, Sabah and Sarawak. Bulletin of the British Museum of Natural History |journal=Bulletin of the British Museum (Natural History), Geology |volume=47 |issue=1 |pages=[https://archive.org/details/bulletinofbritis47brit/page/1 1]–33 |url=https://archive.org/details/bulletinofbritis47brit }}</ref> *{{extinct}}''Hexapus granuliformis'' Karasawa & Kato, 2008 ::From Bolbe, Davao City, Philippines (Mandug Formation, early Pleistocene)<ref name="karasawa">{{cite journal |author1=Hiroaki Karasawa |author2=Hisayoshi Kato |author3=Tomoki Kase |author4=Yolanda Maac-Aguilar |author5=Yukito Kurihara |author6=Hiroki Hayashi |author7=Kyoko Hagino |year=2008 |title=Neogene and Quaternary ghost shrimps and crabs (Crustacea, Decapoda) from the Philippines |journal=Bulletin of the National Museum of Nature and Science. Series C, Geology & Paleontology |volume=34 |pages=51–76 |url=https://www.researchgate.net/publication/261675206 }}</ref> *{{extinct}}''Hexapus nakajimai'' Imaizumi, 1959 ::From the Jōban Coal Field of Iwaki, Fukushima, Japan (Nakayama Formation, Miocene)<ref name="imaizumi">{{cite journal |author=Rikizo Imaizumi |year=1959 |title=A fossil crab, ''Hexapus nakajimai'' n. sp. from Jōban Coal Field |journal=Japanese Journal of Geology and Geography |volume=30 |pages=25–30 |url=http://decapoda.nhm.org/pdfs/37024/37024.pdf }}</ref> *{{extinct}}''Hexapus pinfoldi'' Collins & Morris, 1978 ::From the Khyber Pakhtunkhwa of Pakistan (Kirthar Formation, Lutetian)<ref name="fwpinfoldi">{{cite web |url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=225862 |title=†''Hexapus pinfoldi'' Collins and Morris 1978 (crab) |work=Fossilworks |publisher=Paleobiology Database |access-date=December 15, 2014 }}</ref>

===Excluded species=== ''Hexapus estuarinus'' is now regarded as a junior synonym of ''Hexapus sexpes''. In addition, the following the species has been transferred to other genera:<ref name="rahayu2014"/><ref>{{cite journal |title=Crabs of the family Hexapodidae (Decapoda: Brachyura) from taiwan, with description of a new genus and new species |author1=Jung-Fu Huang |author2=Pan-Wen Hsueh |author3=Peter K. L. Ng |journal=Journal of Crustacean Biology |volume=22 |issue=3 |pages=651–660 |year=2002 |url=http://decapoda.nhm.org/pdfs/17381/17381.pdf |doi=10.1163/20021975-99990277|doi-access=free }}</ref><ref name="worms">{{cite WoRMS|author=Peter J. F. Davie|year=2014|id=246312|title=''Hexapus'' De Haan, 1835 |db=crustacea|accessdate=December 16, 2014}}</ref> *''Hexapus anfractus'' (Rathbun, 1909) - Originally described as ''Lambdophallus anfractus'', now accepted as ''Mariaplax anfracta'' *''Hexapus buchanani'' Monod, 1956 - Now accepted as ''Theoxapus buchanani'' *''Hexapus edwardsii'' Serène & Soh, 1976 - Now accepted as ''Hexapinus edwardsii'' *''Hexapus granuliferus'' Campbell & Stephenson, 1970 - Now accepted as ''Mariaplax granuliferus'' *''Hexapus latipes'' De Haan, 1835 - Now accepted as ''Hexapinus latipes'' *''Hexapus stebbingi'' Barnard, 1947 - Now accepted as ''Tritoplax stebbingi'' *''Hexapus stephenseni'' Serène & Soh, 1976 - Now accepted as ''Mariaplax stephenseni'' *''Hexapus williamsi'' Glassell, 1938 - Now accepted as ''Stevea williamsi''

==References== {{Reflist|40em}}

Category:Crabs Category:Extant Lutetian first appearances Category:Lutetian genus first appearances Category:Taxa named by Wilhem de Haan