Rachis (gastropod)

Rachis is a genus of air-breathing land snails, terrestrial pulmonate gastropod molluscs in the family Cerastidae.

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)
 * Rachis nigrilineata (Reeve, 1849)
 * Rachis obeliscus C. R. Boettger, 1913
 * Rachis pachistoma Bourguignat, 1890
 * Rachis punctata (Anton, 1838)
 * 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 (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 * Rachis braunsii (E. von Martens, 1869) : synonym of Rhachistia braunsii (E. von Martens, 1869) (superseded combination)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) : 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)