Lamellitrochus pourtalesi ( Clench & Aguayo, 1939 )

Cavallari, Daniel C., Salvador, Rodrigo B., Dornellas, Ana P. S. & Simone, Luiz R. L., 2019, Calliostomatidae, Colloniidae, Margaritidae, and Solariellidae (Gastropoda: Trochoidea) collected by the Marion Dufresne (MD 55) expedition in southeastern Brazil, with description of a new species of Calliostoma, Zootaxa 4609 (3), pp. 401-428 : 419-421

Lamellitrochus pourtalesi ( Clench & Aguayo, 1939)

( Fig. 8 D–F)

Synonymy see Quinn (1979). Complement:

Solariella (Solariella) pourtalesi: Quinn, 1979: 42 , figs 63–64.

Lamellitrochus pourtalesi: Quinn, 1991: 83 , figs 4–6; Rosenberg et al., 2009: 623; Barros, 2010: 67, figs 43–49.

Type material. Holotype: MCZ 135018 . Paratypes: MCZ 7579 , Cuba, NW of Havana, 23°42‘N, 83°13‘W, 1572 m (24/ii/1878) ; MCZ 7585 , Mexico, Yucatan Strait , 1170 m ; MCZ 135019 , Cuba, 23°24’N, 80°44’W, 1060 m (W.C. Schroeder leg., 1938) ; MCZ 135020 , Cuba, 23°10’N, 81°29’W, 420 m (W.C. Schroeder leg., 1938) .

Type locality Cuba, Atlantis sta. 2993, 23°24’N, 80°44’W, 1061 m .

Previously known distribution. Florida, USA, to Alagoas state, Brazil, 275–2350 m ( Quinn, 1979; Barros, 2010).

New occurrence. Brazil, off Espírito Santo state, Abrolhos Slope.

Habitat. Quinn (1979) states that the species is more common in depths greater than 1000 m.

Material examined. Brazil: Espírito Santo: off São Mateus, Abrolhos Slope, 18°58’S, 37°49’W, MD55 sta. CB 76, 637 m, MNHN, 2 sh (27/v/1987); 19°01’S, 37°47’W, MD55 sta. CB79, 1500–1575 m, MNHN, 3 sh (28/ v/1987). Additional non-MD55 material: Mexico / Cuba: types.

Measurements. 5 whorls, H= 5.2 mm, D= 5.2 mm (largest specimen).

Remarks. The present material compares well to the types of L. pourtalesi . The species is readily diagnosable by its sculpture pattern (see Quinn 1979 for a full description). The present record greatly expands the species range, ca. 1,000 km to the south.

Figures

FIGURE 8. Solariellidae collected by the MD55 expedition. A–C. Lamellitrochus cancapae MNHN, sta. CB73 (H=9.1 mm, D=9.0 mm). A. apertural view. B. apical view. C. umbilical view. D–F. Lamellitrochus pourtalesi. D. MNHN, sta. CB76 (H=5.2 mm, D=5.2 mm), apertural view. E–F. MNHN, sta. CB79, juvenile specimen (H=3.5 mm, D=3.4 mm) under SEM. E. apertural view. F. umbilical view.