''Rachis'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of air-breathing
land snails,
terrestrial
Terrestrial refers to things related to land or the planet Earth.
Terrestrial may also refer to:
* Terrestrial animal, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to ...
pulmonate gastropod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
s in the family
Cerastidae
Cerastidae is a family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the order Stylommatophora.MolluscaBase eds. (2020). MolluscaBase. Cerastidae Wenz, 1923. Accessed through: World Register of Marine Species at: http ...
.
[MolluscaBase eds. (2022). MolluscaBase. Rachis Albers, 1850. Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=995163 on 2022-03-31]
This genus is also spelled as “Rhachis”as a
synonym. Rachis is a Latinised version of rhachis (a midrib or ridge) or rhachos (a thorn or thorn bush), both of which are Greek nouns of feminine gender.
Species
* ''
Rachis ambongoensis''
Fischer-Piette, 1964
* ''
Rachis aurea''
(Heude, 1890)
* ''
Rachis badiola''
(Morelet, 1881)
* ''
Rachis bewsheri''
(Morelet, 1877)
* ''
Rachis catenata''
(E. von Martens, 1860)
* ''
Rachis comorensis''
(Morelet, 1881)
* ''
Rachis cunctatoris''
van Bruggen, 1975
* ''
Rachis electrina''
(Morelet, 1864)
* ''
Rachis elongatula''
Bourguignat, 1890
* ''
Rachis fagotiana''
(Ancey, 1885)
* ''
Rachis genalensis''
Kobelt, 1910
* ''
Rachis gracillima''
F. Haas, 1936
* ''
Rachis humbloti''
(Morelet, 1888) (accepted > unreplaced junior homonym)
* ''
Rachis ingenua''
(Morelet, 1864)
*''
Rachis jejuna''
(Melvill & Ponsonby, 1893)[Melvill, J. C. & Ponsonby, J. H. (1893). Descriptions of twenty new species of terrestrial and fluviatile Mollusca from South Africa. ''Annals and Magazine of Natural History'', 12(68), 103–112.]
* ''
Rachis nigrilineata''
(Reeve, 1849)
* ''
Rachis obeliscus''
C. R. Boettger, 1913
* ''
Rachis pachistoma''
Bourguignat, 1890
*''
Rachis punctata''
(Anton, 1838)[Anton, H. E. (1839). ''Verzeichniss der Conchylien welche sien in der Sammlung''. Halle: Eduard Anton.]
* ''
Rachis stahlbergi''
C. R. Boettger, 1913
*''
Rachis tulearensis''
Fischer-Piette, 1964
* ''
Rachis venusta''
(Morelet, 1861)
* ''
Rachis zonulata''
(L. Pfeiffer, 1846)
;Synonyms:
* ''Rachis aldabrae''
(E. von Martens, 1898): synonym of ''
Rhachistia aldabrae
''Rhachistia aldabrae'', the Aldabra banded snail, is a species of air-breathing land snail, a pulmonate gastropod mollusc in the family Cerastidae. The species lives on one atoll in the Seychelles Islands, Indian Ocean, and is easily recognizab ...
''
(E. von Martens, 1898) (unaccepted combination)
* ''Rachis badiolus'': synonym of ''Rachis badiola''
(Morelet, 1881) (incorrect grammatical agreement of specific epithet)
* ''Rachis bidwilli''
(Cox, 1868): synonym of ''
Rhachistia histrio''
(L. Pfeiffer, 1855)
* ''Rachis bloyeti''
Bourguignat, 1890: synonym of ''Rhachidina braunsii''
(E. von Martens, 1869): synonym of ''
Rhachistia braunsii''
(E. von Martens, 1869) (junior synonym)
* ''Rachis boehmi''
(E. von Martens, 1895): synonym of ''
Rhachistia boehmi''
(E. von Martens, 1895)
* ''Rachis braunsii''
(E. von Martens, 1869): synonym of ''
Rhachistia braunsii''
(E. von Martens, 1869) (superseded combination)
* ''Rachis burnayi''
(Dohrn, 1866): synonym of ''
Gittenedouardia burnayi''
(Dohrn, 1866)
* ''
Rachis burtoi''
(Bourguignat, 1890): synonym of ''Rachis punctata''
(Anton, 1838) (junior synonym)
* ''Rachis chalcedonica''
(Gredler, 1887): synonym of ''
Mirus chalcedonicus''
(Gredler, 1887) (unaccepted combination)
* ''Rachis dohrni''
(Greeff, 1882): synonym of ''
Aporachis dohrni''
(Greeff, 1882)
* ''Rachis eminula''
(Morelet, 1848): synonym of ''
Gittenedouardia eminula''
(Morelet, 1848)
* ''Rachis erlangeri''
Kobelt, 1910: synonym of ''
Rhachistia erlangeri''
(Kobelt, 1910) (unaccepted combination)
* ''Rachis fagotianus'': synonym of ''Rachis fagotiana''
(Ancey, 1885) (incorrect grammatical agreement of specific epithet)
* ''Rachis hieroglyphicus''
Preston, 1910: synonym of ''Rachis hieroglyphica''
Preston, 1910 (incorrect grammatical agreement of specific epithet)
* ''Rachis hispida''
(Greeff, 1882): synonym of ''
Aporachis hispida''
(Greeff, 1882)
* ''Rachis ingenuus'': synonym of ''Rachis ingenua''
(Morelet, 1864) (incorrect grammatical agreement of specific epithet)
* ''Rachis jouberti''
Bourguignat, 1890: synonym of ''Rhachidina braunsii var. succincta''
(E. von Martens, 1879): synonym of ''
Rhachistia braunsii''
(E. von Martens, 1869)
* ''Rachis libbahensis''
(Tomlin, 1910): synonym of ''
Zebrinops libbahensis''
(Tomlin, 1910)
* ''Rachis moluensis''
Kobelt, 1910: synonym of ''
Rhachistia moluensis''
(Kobelt, 1910)
* ''Rachis nigrilineatus''
(Reeve, 1849): synonym of ''Rachis nigrilineata''
(Reeve, 1849) (incorrect grammatical agreement of specific epithet)
* ''Rachis onychinus''
(Heude, 1885): synonym of ''
Sinorachis onychinus'' (Heude, 1885) (unaccepted combination
*''Rachis petersi''
(Pfeiffer, 1855):
[Pfeiffer, L. (1855). Description of thirty-eight new species of Helicea, from the collection of H. Cuming, Esq. ''Proceedings of the Zoological Society of London, 23, 91–101.] synonym of ''
Pleurorhachis petersi''
(L. Pfeiffer, 1855) (superseded combination)
* ''Rachis punctatus''
(Anton, 1838): synonym of ''Rachis punctata''
(Anton, 1838) (incorrect grammatical agreement of specific epithet)
* ''Rachis rorkorensis''
Kobelt, 1910: synonym of ''
Rhachistia rorkorensis''
(Kobelt, 1910)
* ''Rachis succincta''
(E. von Martens, 1879): synonym of ''
Rhachistia braunsii''
(E. von Martens, 1869) (junior synonym)
* ''Rachis turricula''
Preston, 1911: synonym of ''
Gittenedouardia turricula''
(Preston, 1911) (original combination)
* ''Rachis venustus''
(Morelet, 1861): synonym of ''Rachis venusta''
(Morelet, 1861) (incorrect grammatical agreement of specific epithet)
* ''Rachis vesiculatus''
(Benson, 1859): synonym of ''
Rhachistia vesiculata''
(Benson, 1859) (incorrect grammatical agreement of specific epithet)
* ''Rachis vicinus''
Preston, 1910: synonym of ''
Rhachistia chiradzuluensis''
(E.A. Smith, 1899) (junior synonym)
* ''Rachis virginea''
Preston, 1911: synonym of ''Rhachistia chiradzuluensis var. virginea''
(Preston, 1911) (original combination)
References
* Bank, R. A. (2017). Classification of the Recent terrestrial Gastropoda of the World. Last update: July 16, 2017
External links
Albers, J. C. (1850). Die Heliceen nach natürlicher Verwandtschaft systematisch geordnet. Berlin: Enslin. 262 pp.Bourguignat, J.-R. (1890). Mollusques de l'Afrique équatoriale de Moguedouchou à Bagamoyo et de Bagamoyo au Tanganika. 1-229, pls 1-8. Book dated 1889, publication date 1890
{{Taxonbar, from=Q7320021
Gastropod genera
Molluscs of Africa
Cerastidae