“Odontocymbiola magellanica Gmelin
Plates 82, 83, 108, 109
Voluta magellanica Gmelin 1791, Systema Naturae, ed. 13, 6: 3465 (Straits of Magellan). [Based upon Chemnitz 1788, Conchylien-Cabinet (1) 10: 138, pl. 148, figs. 1383-1384.]; non V.magellanica Lamarck 1811,
Voluta magellanica 'Chemnitz' Lahille 1895, Revista del Museo de la Plata 6: 317, pl. 1, fig. 1; pl. 2, figs. 64-65; pl. 7, figs. 148-149, 154; pl. 8; pl. 12. Lahille has introduced the following named forms: curta and taeniolata, p. 318.
Voluta ambigua Lahille 1895, Revista del Museo de la Plata 6: 319, pl. 2, fig. 61; pl. 8, figs. 163-164; pl. 11, figs. 6. 9, 11; pl. 12, figs. 11-16 (Argentina). Lahille has introduced the following named forms: subnodosa, p. 319, non Leach 1814; constricta, p. 320; pseudotuberculata, p. 320.
Adelomelon ancilla ‘Solander’ Pilsbry and Olsson 1954, Bull. American Paleontology 35: 306, pl. 28, fig. 6; non Voluta ancilla Solander 1786.
Description. Shell reaching 190 mm. (7½ inches) in length, imperforate and smooth. Color a light ivory with a few irregular, narrow, zig-zag, axial bands of brown; inside the aperture a light salmon and highly glazed. Whorls 5 and moderately convex. Spire moderately extended and produced at an angle of from 55° to 65°. Aperture semicircular, with a broad, shallow siphonal canal. Outer lip thin and simple. Parietal wall glazed, sharply margined and having 3 or 4 well-defined plicae. Columella straight to slightly arched. Suture indented, occasional specimens showing pointed crenulations on the body whorl. Sculpture consisting of fine, irregular growth lines; occasional specimens being tuberculate on the whorl shoulder. Protoconch small and poorly defined. Periostracum deciduous. Operculum lacking.
Radula uniserial, consisting of rachidian teeth, each tooth with three denticles which are fang-like.
length
width
190 mm.
76 mm.
San Gregorio, Straits of Magellan, Chile
122
56
Shoal Bay, Straits of Magellan, Chile
111
50
Shoal Bay, Straits of Magellan, Chile
Remarks. In shell characters this species is nearest to Adelomelon ancilla Solander. differing by being proportionately broader, having a wider and more capacious aperture and a more solid shell. The radula of Odontocymbiola magellanica Gmelin differs remarkably from Adelomelon ancilla Solander. In magellanica the denticles or cusps are fang-like and project outward and down, each denticle forming an arc. A somewhat similar radula to that of O. magellanica is found in Miomelon philippianus Dall from the southwest coast of Chile (677 fathoms). The shell, however, is very different.
Range. From off Río de La Plata in Argentina south to the Straits of Magellan; north to Chiloe Island, Chile and the Falkland Islands.
Specimens examined. ARGENTINA : about 155 miles E of Cabo San Antonio in 81 fathoms; SE of Punta Médanos (both C. Weaver ; E. Rios); off Mar del Plata, Prov. Buenos Aires (A. Carcelles); Puerto Quequén (USNM); Albatross, Station 2768, about 275 miles ENE of Cabo Delgada (42°24' S; 61°38' W) in 61 fathoms (USNM); Puerto Deseado, Patagonia (M. Birabén). CHILE: Shoal Bay, Straits of Magellan (52°55'S; 70º52' W) (Hassler Voyage, MCZ); San Gregorio, Straits of Magellan (52°37' S; 70º12' W) (MCZ; USNM); Burnt Id., Bahía Orange (USNM). FALKLAND ISLANDS:
(MCZ); Port Stanley (USNM).”
(Clench & Turner, 1964: 171-172)
Odontocymbiola magellanica is a species of sea snail, a marine gastropod mollusk in the family Volutidae, the volutes.[1]
Odontocymbiola magellanica is a species of sea snail, a marine gastropod mollusk in the family Volutidae, the volutes.
