Cerithiopsilla, Thiele, 1912

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 : 50

Cerithiopsilla sp.

Fig. 2M

Examined material. 10 sh. (MACN-In 40675).

Description. Shell height to 3.8 mm; turritelliform, moderately solid. Protoconch large, of 2.25 convex whorls, sculptured with about 24 strong, closely arranged, axial ribs per whorl. Teleoconch of up to 5 whorls, markedly convex in outline; last whorl comprising about 50% of total shell height. Suture impressed. Surface pale-brown; sculptured with 3 or 4 spiral cords and about 20 axial ribs on the first 1.5 teleoconch whorls, which produce small beads at their intersections; axial ribs become gradually less evident on subsequent whorls. Base delimited with a strong cord; 3 additional, narrower cords sometimes are present. Aperture ovate, interior pale-brown; columellar callus narrow; siphonal canal short, markedly oblique, wide.

Figures

FIGURE 2. A. Parmaphorella melvilli (Thiele, 1912), MACN-In 40660, scale bar = 4 mm. B. Puncturella conica (d´Orbigny, 1841), MACN-In 40661, scale bar = 2 mm. C. Anatoma conica (d´Orbigny, 1841), MACN-In 40662, scale bar = 1 mm. D. Scissurella clathrata Strebel, 1908, MACN-In 40663, scale bar = 0.5 mm. E. Calliostoma cf. moebiusi Strebel, 1905, MACN- In 40665, scale bar = 4 mm. F. Margarella expansa (Sowerby, 1838), MACN-In 40666, scale bar = 2 mm. G. Ganesa sp., MACN-In 40667, scale bar = 1 mm. H. Liotella crassicostata (Strebel, 1908), MACN-In 40664, scale bar = 0.25 mm. I. Colpospirella algida (Melvill & Standen, 1912), MACN-In 40668, scale bar = 2 mm. J. “Cirsotrema” strebeli Zelaya & Güller, 2017, MACN-In 40673, scale bar = 2 mm. K. Cerithiopsis (?) caelatum (Gould, 1849), MACN-In 40677, scale bar = 2 mm. L. Cerithiopsilla burdwoodiana (Melvill & Standen, 1912), MACN-In 40674, scale bar = 1 mm. M. Cerithiopsilla sp., MACN-In 40675, scale bar = 1 mm. N. Eumetula michaelseni (Strebel, 1905), MACN-In 40676, scale bar = 1 mm.