Cerithiopsilla burdwoodiana ( Melvill & Standen, 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 : 49

Cerithiopsilla burdwoodiana ( Melvill & Standen, 1912)

Fig. 2L

Bittium burdwoodianum Melvill & Standen, 1912: 125 , fig. 12

Cerithiopsilla burdwoodiana — Linse, 1997: 30, pl. 10, fig. c

Examined material. 56 sh. (MACN-In 40674); 3 syntypes (NMSZ 1921.143.643).

Description. Shell height to 5.2 mm; turritelliform, moderately solid. Protoconch large, gradated, of about 1.5 whorls, sculptured with 22 to 24 strong, closely arranged, axial ribs; transition to teleoconch not clearly defined. Teleoconch of up to 9.5 whorls, almost straight in outline; last whorl comprising about 25% of total shell height. Suture impressed. Surface brownish, clearest at the base and the sutures on last whorls; sculptured with 18 to 21 axial ribs per whorl and 3 prominent spiral cords, which produce large beads at their intersections. An additional, lower, smooth cord appears at the suture and delimits the base. Axial sculpture vanishing on last whorls in some specimens. Aperture subquadrate, interior brownish; 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.