Liotella crassicostata ( 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 : 47-48

Liotella crassicostata ( Strebel, 1908)

Fig. 2H

Cyclostrema crassicostatum Strebel, 1908: 76 , pl. 6, figs. 83a–c

Liotella crassicostata — Absalão et al., 2001: 679

Examined material. 1 an. and 1 sh. (MACN-In 40664). Description. Shell width to 0.8 mm (up to 1.5 mm according to Strebel 1908); trochiform, solid. Protoconch of

about 1 whorl; transition to teleoconch poorly defined. Teleoconch of up to 1.75 whorls, markedly convex in outline; last whorl comprising about 90% of total shell height. Suture deep, slightly channeled. Surface white; sculptured with 16 to 19 strong axial ribs per whorl. Aperture rounded, interior white; columellar callus moderately thick. Umbilicus narrow.

Remarks. The original figure shows fewer axial ribs than the material here examined (13 or 14 vs. 16 to 19). However, Strebel (1908) pointed out that number of ribs he figured is approximate.

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.