Falsimargarita terespira Simone, 2008

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 : 410-412

Falsimargarita terespira Simone, 2008

( Fig. 5 A–C)

Falsimargarita terespira Simone, 2008: 15 , figs 1–7; Dornellas & Simone, 2011: 39.

Type material. Holotype: MZSP 86789 . Paratypes: MZSP 86784 , 4 sh, Brazil, Santa Catarina, off Itajai , 26º53’S, 48º24’W, 400 m, otter trawl, inside Lophelia cf. pertusa (L.) (local fishermen leg., i/2006) ; MZSP 86786 , 1 sh, from type locality .

Type locality. Brazil, Santa Catarina state, off Cape Santa Marta , 28º37’S, 48º43’W (stomach content of batfish Lophius sp.) .

Previously known distribution. Off Santa Catarina state, Cape Santa Marta and Itajaí, 200–400 m (live specimens).

New occurrence. Southeastern Brazil, Rio de Janeiro, off Cabo Frio.

Habitat. Coralline and sandy bottoms.

Material examined. Brazil: Rio de Janeiro: off Cabo Frio , 23°36’S, 42°01’W, MD55 sta. CB103 , 200– 217 m depth, MNHN, 10 sh (02/vi/1987). Additional non-MD55 material : Brazil: Santa Catarina: types .

Measurements. 5¾ whorls, H= 10.5 mm, D= 10.7 mm (largest specimen).

Remarks. The present material compares extremely well with the types. As remarked by Simone (2008), F. terespira is the northernmost species of the genus. This distribution is herein extended further to the north (ca. 450 km) in Brazilian waters.

Figures

FIGURE 5. Calliostomatidae and Colloniidae collected by the MD55 expedition, and specimens from Northeast Brazil. A–C. Falsimargarita terespira MNHN, sta. CB103 (H=10.5 mm, D=10.7 mm). A. apertural view. B. apical view. C. umbilical view. D–J. Homalopoma linnei. D–F. MNHN, sta. DC73 spm #1 (H=5.5 mm, D=4.7 mm). D. apertural view. E. apical view. F. umbilical view. G–I. MNHN, sta DC73 spm #2 (H=4.8, D=5.4 mm), under SEM. G. apical view. H. detail of apex. I–J. operculum of specimen from Canopus Bank, off Northeast Brazil, MZSP 70295. I. inner side (L=1.5 mm), J. outer side. K–N. Homalopoma boffii, specimen from Canopus Bank, off Northeast Brazil, MZSP 93535. K–L. operculum (L=1.2 mm). K. inner side. L. outer side. M. detail of apex under SEM, N. apertural view (H=7.3 mm, D=7.8 mm).