Trophon geversianus (Pallas, 1774)

Rosenfeld, Sebastian, Aldea, Cristian, Mansilla, Andres, Marambio, Johanna & Ojeda, Jaime, 2015, Richness, systematics, and distribution of molluscs associated with the macroalga Gigartina skottsbergii in the Strait of Magellan, Chile: A biogeographic affinity study, ZooKeys 519, pp. 49-100 : 68

Trophon geversianus (Pallas, 1774) Fig. 6E

Material examined.

77 spm (30 × 17 - 53 × 38 mm).

Synonymy.

See Pastorino (2005b).

Remarks.

Trophon geversianus is the most well-known species of the genus Trophon . Its morphological variability is evident in the quantity of names proposed for each morphotype of this species ( Pastorino 2005b). The rest of the nominal species from the Southern Ocean and adjacent waters displaying a similar morphology were compared by Aldea and Troncoso (2010a).

Distribution.

Magellanic: Strait of Magellan ( Rochebrune and Mabille 1889, Lamy 1906b, Powell 1951, Houart 1998, Mutschke et al. 1998, Osorio 1999, Linse 2002, Pastorino 2005b, USNM 2010, Aldea et al. 2011a): Punta Santa María (this record); Usuahia ( Rochebrune and Mabille 1889, Strebel 1908, Pastorino 2005b), Beagle Channel ( Rochebrune and Mabille 1889, Pelseneer 1903, Dell 1971, Osorio 1999), Róbalo Bay ( Ojeda et al. 2010), and Cape Horn ( Rochebrune and Mabille 1889); San Antonio Oeste, Sierra Grande, Puerto Lobos, Puerto Pirámides, Puerto Madryn, San Jorge Gulf, Puerto Deseado, and Punta Peñas ( Pastorino 2005b), Santa Cruz River ( Powell 1951, Pastorino 2005b), Río Gallegos ( Pastorino 2005b), Malvinas/Falkland Islands ( Watson 1886, Melvill and Standen 1898, Melvill and Standen 1907, Strebel 1908, Powell 1951, Pastorino 2005b), Burdwood Bank ( Melvill and Standen 1912, Pastorino 2005b), and Staten Island ( USNM 2010). WTSA: Buenos Aires ( Morris and Rosenberg 2005). SO: Heard Island ( Watson 1886); records from western Antarctic Peninsula ( Lamy 1906b) could correspond to an Antarctic species ( Aldea and Troncoso 2010a).