PULMONATA

Dayrat, B. & Tillier, S., 2002, Evolutionary relationships of euthyneuran gastropods (Mollusca): a cladistic re-evaluation of morphological characters, Zoological Journal of the Linnean Society 135 (4), pp. 403-470 : 461

PULMONATA, ONCHIDIIDAE

Onchidium Buchanan, 1800 (Awati & Karandikar, 1948; Ruthensteiner, 1997). Anatomy similar to that of Onchidiella for all characters (except few characters of the nervous system). Spermatic characters described on Onchidium only.

Onchidiella Gray, 1850 (Semper, 1880, 1882; Joyeux-Laffuie, 1882; Plate, 1893; Pelseneer, 1901; Watson, 1925; Labbé 1933a, b, c, 1934a; Tuzet, 1940; Fretter, 1943, 1975; Awati & Karandikar, 1948; Boettger, 1954; Marcus, 1959; Solem, 1959; Ghiselin, 1966; Oberzeller, 1969; Marcus & Marcus, 1970; Gosliner, 1981a; Tillier, 1984; Robertson, 1985; Young et al., 1986). (1) The shell is probably not heterostrophic (Robertson, 1985); moreover, the veliger shell and adult anatomy are dextral (Joyeux-Laffuie, 1882; Fretter, 1943). (25) The larval kidney (Joyeux- Laffuie, 1882) is probably homologous with the PMO, but Robertson (1985) considered that the PMO is probably absent in Onchidiidae . (43–51) Many assumptions should be tested according to studies of Joyeux-Laffuie (1882) and Van Mol (1967) because they used an ambiguous terminology for the visceral loop: {Pl(SbAb)(SpPl)}, {(PlSb)Ab(SpPl)} or {SbAbSp}. (53) Dorsal bodies are either considered as absent (Lever, 1958b) or present (Van Mol, 1967). (67) The gelatinous coating that joins the albuminate eggs of the spawn is probably homologous with a chalaze (Awati & Karandikar, 1948).