Cyrtomaia, from the Smithsonian Institution.

Belongs within: Heterotremata.

The Inachidae are a group of spider crabs in which the often long eyestalks lack orbits.

Characters (from Bennett 1964, as Inachinae): Eyes without orbits; eyestalks generally long, either non-retractile or retractile against sides of carapace or against acute postocular spine; basal article of antenna extremely slender throughout its length, usually long.

<==Inachidae [Inachinae]
    |--Camposcioidea B64
    |    |--Camposcia retusa Latreille 1829 MG-H11
    |    |--Stenorhynchus fissifrons Haswell 1879 B64
    |    `--Trichoplatus Milne Edwards 1876 B64
    |         `--*T. huttoni Milne Edwards 1876 (see below for synonymy) B64
    `--Macrocheiroidea [Macrocheiridae] B64
         |--Macrocheira kaempferi MD01
         `--Cyrtomaia Miers 1886 [incl. Echinomaia Borradaile 1916] B64
              |--C. balssi iIhle & Ihle-Landenberg 1931 B64
              |--C. bicornis Ihle & Ihle-Landenberg 1931 B64
              |--C. echinata Rathbun 1916 B64
              |--C. goodridgei McArdle 1900 B64
              |--C. hispida (Borradaile 1916) [=Echinomaia hispida; incl. C. platypes Yokoya 1933] B64
              |--C. horrida Rathbun 1916 (see below for synonymy) B64
              |--C. lamellata Rathbun 1906 B64
              |--C. maccullochi Rathbun 1918 MG-H11
              |--C. murrayi Miers 1886 MG-H11
              |--C. septemspinosa Rathbun 1932 B64
              |--C. smithi Rathbun 1893 [incl. C. smithi var. tenuipedunculata Ihle & Ihle-Landenberg 1931] B64
              `--C. suhmi Miers 1886 B64

Inachidae incertae sedis:
  Inachus TF08
    |--I. aguiarii De Brito Capello 1876 KK03
    |--I. communissimus Rizza 1839 KK03
    |--I. dorsettensis (Pennant 1777) TF08
    |--I. leptochirus Leach 1817 KK03
    |--I. mauritanicus Lucas 1846 E12
    `--I. thoracicus Roux 1830 KK03
  Dorhynchus MG-H11
    |--D. ramusculus (Baker 1906) MG-H11
    `--D. thomsoni (Thomson 1873) KK03
  Dumea latipes (Haswell 1880) MG-H11
  Ephippias endeavouri Rathbun 1918 MG-H11
  Grypachaeus hyalinus (Alcock & Anderson 1894) MG-H11
  Physachaeus ctenurus Alcock 1895 MG-H11
  Pleistacantha maxima Ahyong & Lee 2006 MG-H11
  Sunipea indicus (Alcock 1895) MG-H11
  Platymaia MG-H11
    |--P. fimbriata Rathbun 1916 MG-H11
    `--P. wyvillethomsoni Miers 1886 MG-H11
  Achaeus Leach 1817 B64
    |--A. brevirostris (Haswell 1879) MG-H11
    |--A. cranchii Leach 1817 KK03
    |--A. curvirostris (Milne-Edwards 1873) MG-H11
    |--A. gracilis Costa 1839 KK03
    `--A. lacertosus Stimpson 1858 MG-H11
  Oncinopus MG-H11
    |--O. angustifrons Takeda & Miyake 1969 MG-H11
    |--O. aranea De Haan 1839 MG-H11
    `--O. neptunus Adams & White 1848 MG-H11
  Achaeopsis Stimpson 1857 B64
  Macropodia Leach 1814 B64
    |--M. czernjawskii (Brandt 1880) KK03
    |--M. linaresi Forest & Zariquiey-Alvarez 1964 KK03
    |--M. longipes (Milne-Edwards & Bouvier 1899) KK03
    |--M. rostrata (Linnaeus 1761) KK03
    `--M. tenuirostris (Leach 1814) KK03

Cyrtomaia horrida Rathbun 1916 [incl. C. horrida var. japonica Balss 1924, C. horrida var. pilosa Ihle & Ihle-Landenberg 1931] B64

*Trichoplatus huttoni Milne Edwards 1876 [=Naxia huttoni; incl. Halimus hectori Miers 1876, H. rubiginosus Kirk 1881, Naxia (Halimus) rubiginosus] B64

*Type species of generic name indicated


[B64] Bennett, E. W. 1964. The marine fauna of New Zealand: Crustacea Brachyura. New Zealand Department of Scientific and Industrial Research Bulletin 153: 1–120.

[E12] Evenhuis, N. L. 2012. Publication and dating of the Exploration Scientifique de l'Algérie: Histoire Naturelle des Animaux Articulés (1846–1849) by Pierre Hippolyte Lucas. Zootaxa 3448: 1–61.

[KK03] Kocataş, A., & T. Katağan. 2003. The decapod crustacean fauna of the Turkish seas. Zoology in the Middle East 29: 63–74.

[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1–124.

[MG-H11] McEnnulty, F. R., K. L. Gowlett-Holmes, A. Williams, F. Althaus, J. Fromont, G. C. B. Poore, T. D. O'Hara, L. Marsh, P. Kott, S. Slack-Smith, P. Alderslade & M. V. Kitahara. 2011. The deepwater megabenthic invertebrates on the western continental margin of Australia (100–1100 m depths): composition, distribution and novelty. Records of the Western Australian Museum Supplement 80: 1–191.

[TF08] Teixeira, G. M., V. Fransozo, A. L. Castilho, R. C. da Costa & F. A. d. M. Freire. 2008. Size distribution and sex ration in the spider crab Epialtus brasiliensis (Dana 1852) associated with seaweed on a rocky shore in southeastern Brazil (Crustacea, Decapoda, Brachyura, Majoidea, Epialtidae). Senckenbergiana Biologica 88 (2): 169–175.

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