Scissurella clathrata Strebel, 1908

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 : 45

Scissurella clathrata Strebel, 1908

Fig. 2D

Scissurella clathrata Strebel, 1908: 77 , pl. 6, figs. 84a–d; Zelaya & Geiger, 2007: 17, figs. 91–123 (synonymy, protoconch and radula) Scissurella eucharista Melvill & Standen, 1912: 118 , figs. 1, 1a

Examined material. 8 an. and 5 sh. (MACN-In 40663); holotype of Scissurella eucharista (NMSZ 1921.143.395).

Description. Shell width to 1.2 mm (up to 1.4 mm according to Zelaya & Geiger 2007); trochiform, delicate. Protoconch of 1.25 convex whorls; apex partially sunken. Teleoconch of up to 2.25 whorls, markedly convex in outline; last whorl comprising about 90% of total shell height. Suture deep, slightly channeled. Surface white; sculptured with weak, equally developed, prosocline axial and spiral sculpture, producing a cancellate pattern (eroded in the photographed specimen); in addition, 2 strong spiral cords delimiting selenizone. Aperture rounded, with small selenizone. Umbilicus wide, deep. Operculum rounded, multispiral; pale brown, translucent.

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.