Odostomia, Fleming, 1813

Luca, Javier Di & Zelaya, Diego G., 2019, Gastropods from the Burdwood Bank (southwestern Atlantic): an overview of species diversity, Zootaxa 4544 (1), pp. 41-78 : 65

Odostomia sp. 2

Fig. 5H

Odostomia sp. 2— Zelaya & Gordillo, 2010: 14, fig. 3LL

Examined material. 1 an. and 6 sh. (MACN-In 40703).

Description. Shell height to 3.1 mm; elongate-conical, moderately solid. Protoconch markedly tilted, apex partially sunken; transition to teleoconch poorly defined. Teleoconch of up to 4 whorls, slightly convex in outline; last whorl comprising about 70% of total shell height. Suture deep, impressed. Surface whitish; only sculptured with faint growth lines. Aperture ovate, interior white; columella with a strong fold (hardly visible in apertural view), callus anteriorly thickened. Umbilicus partially closed in larger specimens, and completely closed in smaller ones.

Figures

FIGURE 5. A. Orbistestella ponderi Linse, 2002, MACN-In 40697, scale bar = 0.25 mm. B. Acteon biplicatus (Strebel, 1908), MACN-In 40698, scale bar = 1 mm. C. Neactaeonina argentina Zelaya, Schejter & Ituarte, 2011, MACN-In 40699, scale bar = 4 mm. D. Mathilda malvinarum (Melvill & Standen, 1907), MACN-In 40700, scale bar = 1 mm. E–F. Omalogyra burdwoodiana Strebel, 1908, MACN-In 40701, scale bar = 0.5 mm. E. Lateral view. F. Apical view. G. Odostomia sp. 1, MACN-In 40702, scale bar = 1 mm. H. Odostomia sp. 2, MACN-In 40703, scale bar = 1 mm. I. Odostomia sp. 3, MACN-In 40704, scale bar = 1 mm. J. Turbonilla strebeli Corgan, 1969, MACN-In 40705, scale bar = 1 mm. K. Diaphana paessleri (Strebel, 1905), MACN-In 40706, scale bar = 1 mm. L. Toledonia cf. elata Thiele, 1912, MACN-In 40708, scale bar = 1 mm. M. Toledonia cf. perplexa Dall, 1902, MACN-In 40707, scale bar = 1 mm. N. Toledonia sp., MACN-In 40709, scale bar = 1 mm.