Neactaeonina argentina Zelaya, Schejter & Ituarte, 2011

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 : 62-63

Neactaeonina argentina Zelaya, Schejter & Ituarte, 2011

Fig. 5C

Neactaeonina argentina Zelaya et al., 2011 : figs. 2–43 (protoconch and radula)

Examined material. 7 sh. (MACN-In 40699); holotype (MLP-Ma 13264) and 4 paratypes (MLP-Ma 13265 and MACN-In 38140).

Description. Shell height to 20.1 mm (up to 23.5 mm according to Zelaya et al. 2011); ovate, solid.

Protoconch large, of 1.5 slightly convex whorls. Teleoconch of up to 3.5 whorls, slightly convex in outline; last whorl comprising about 80% of total shell height. Suture deep, slightly channeled. Surface pale brownish; sculptured with low spiral cords: 10 to 19 on spire whorls and about 65 on the last whorl. Aperture large, ovate, interior white; columellar callus thickened anteriorly, slightly expanded over the umbilical area.

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.