Leptomithrax

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Crustacea
Superclassis: Multicrustacea
Classis: Malacostraca
Subclassis: Eumalacostraca
Superordo: Eucarida
Ordo: Decapoda
Subordo: Pleocyemata
Infraordo: Brachyura
Sectio: Eubrachyura
Subsectio: Heterotremata
Superfamilia: Majoidea

Familia: Majidae
Genus: Leptomithrax
References

McLay, C.L.; Feldmann, R.M.; MacKinnon, D.I. 1995: New species of Miocene spider crabs from New Zealand, and a partial cladistic analysis of the genus Leptomithrax Miers, 1876 (Brachyura: Majidae). New Zealand journal of geology and geophysics, 38: 299–313.

Leptomithrax is a genus of crabs in the family Majidae, first described by Edward J. Miers in 1876.[1][2] They have been on Earth for 37.2 million years.[3]
Species
Extant species

Leptomithrax australis (Jacquinot in Jacquinot & Lucas, 1853)
Leptomithrax bifidus (Ortmann, 1893)
Leptomithrax depressus Richer de Forges, 1993
Leptomithrax edwardsii (De Haan, 1835)
Leptomithrax eldredgei Richer de Forges & Ng, 2015
Leptomithrax gaimardii (H. Milne Edwards, 1834)
Leptomithrax garricki Griffin, 1966
Leptomithrax globifer Rathbun, 1918
Leptomithrax longimanus (Miers, 1876)
Leptomithrax longipes (G. M. Thomson, 1902)
Leptomithrax mortenseni Bennett, 1964
Leptomithrax sinensis Rathbun, 1916
Leptomithrax sternocostulatus (H. Milne Edwards, 1851)
Leptomithrax tuberculatus Whitelegge, 1900
Leptomithrax waitei (Whitelegge, 1900)

[1]
Extinct species

Leptomithrax atavus Glaessner 1960
Leptomithrax elegans Jenkins 1985
Leptomithrax elongatus McLay 1995
Leptomithrax garthi McLay et al. 1995
Leptomithrax griffini Feldmann and Maxwell 1990
Leptomithrax irirangi Glaessner 1960
Leptomithrax martensis Jenkins 1985
Leptomithrax uruti Glaessner 1960

[3]
References

"WoRMS - World Register of Marine Species - Leptomithrax Miers, 1876". www.marinespecies.org. Retrieved 2019-04-13.
Edward J. Miers (March 1876). "XXII.—Descriptions of some new species of Crustacea, chiefly from New Zealand". Annals and Magazine of Natural History. 17 (99): 218–229. doi:10.1080/00222937608681934. ISSN 0374-5481. Wikidata Q56116220.
"Fossilworks: Leptomithrax". fossilworks.org. Retrieved 17 December 2021.