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Triton leucostomoides Sowerby 1846 from: Griffin, M..Nielsen, S.N.. (2008): A revision of the type specimens of Tertiary molluscs from Chile and Argentina described by d’Orbigny (1842), Sowerby (1846), and Hupé (1854) . Journal of Systematic Palaeontology
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Species Triton leucostomoides Sowerby 1846


Discussion / Comments:
Griffin & Nielsen (2008):
TYPE MATERIAL. Three syntypes: NHM-G26337, NHM-G26338 (smallest syntype, Sowerby’s pl. 4, fig. 64), NHM-G26365 (all Isla Guafo). According to A.G. Beu (personal communication) NHM-G26338 is a juvenile Fusitriton, not identifiable to species. To fix the status of this species we select NHM-G26337, a typical Sassia leucostomoides, as the lectotype. REMARKS. Frassinetti (2000) cited quite a large suite of specimens present in the Museo Nacional de Historia Natural, Santiago, Chile, from the type locality. However, the matrix in the syntypes is hard sandstone, while Frassinetti’s specimens come from mudstone. One syntype (NHM-G26338) has a large protoconch of about 4.2 slightly eroded whorls that show traces of spiral threads, diameter and height of protoconch is 2.6 mm each. Frassinetti’s (2000) specimens have protoconchs of about 3.5 to 4 whorls, which seems to reflect intraspecific variation.
Synonym list:
Griffin & Nielsen (2008):
1846 Triton leucostomoides Sowerby. - Sowerby : p.260 pl. 4; fig. 64
2000 Sassia leucostomoides Sowerby. - Frassinetti : p.136 pl. 1; fig. 11-14
2008 Sassia leucostomoides Sowerby. - Griffin & Nielsen : pl. 21; fig. 9-14
References:

Sowerby,G.B.. (1846):
Descriptions of Tertiary fossil shells from South America..
In: Geological observations on South America. Eds: Darwin, C.. p. 249-264

Frassinetti,D.. (2000):
Moluscos del plioceno superior marino de Isla Guafo, sur de Chile. Parte II: gastropoda . Boletín del Museo nacional de historia natural, n°spécial:, Santiago Vol. 49 p. 131-161

Griffin,M.. and Nielsen,S.N.. (2008):
A revision of the type specimens of Tertiary molluscs from Chile and Argentina described by d’Orbigny (1842), Sowerby (1846), and Hupé (1854) . Journal of Systematic Palaeontology
Anonymous: Unedited TaxonConcept data
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