Cerithiopsis rabilleri Cecalupo & Perugia, 2020

Pimenta, Alexandre Dias, Faria, Raquel Garofalo De Souza, Figueira, Raquel Medeiros Andrade & Fernandes, Maurício Romulo, 2024, Unraveling another of the ‘ Big Fiveʹ: new species and records of Cerithiopsidae from Brazil (Caenogastropoda: Triphoroidea), Zootaxa 5494 (1), pp. 1-71 : 19

Cerithiopsis rabilleri Cecalupo & Perugia, 2020

( Fig. 7 )

Cerithiopsis rabilleri Cecalupo & Perugia, 2020: 45 , pl. 22, figs. 1a–c.

Type material. Holotype: MNHN – IM –2000–34811.

Type locality. Martinique, Macouba, N Pointe de Macouba , 15 m.

Material examined. The holotype and: Brazil: -- Bahia state: Baía de Todos os Santos , 12°53ʹS, 38°42ʹW, 24 m, O. Falcão coll., 22/iv/1997: IBUFRJ 20651 [2]; Parcel de Paredes, Alcobaça , 2–3 m, P.J. Souza Jr. & E. Gonçalves coll., i/2000: MZSP 56315 [1], MZSP 46307 [2]; -- Rio de Janeiro state: HAB 16 sta. G3: MNRJ 17367 [1*p]; HAB 16 sta. G3: MNRJ 34310 [1*]; HAB 11 sta. E3: MNRJ 16270 [1*]; HAB 16 sta. F3: MNRJ 16509 [3*]; HAB 16 sta. E3: MNRJ 16512 [1*]; HAB 17 sta. C2: MNRJ 16511 [2*]; HAB 11 sta. C2: MNRJ 16272 [1*p]; HAB 11 sta. B3: MNRJ 16271 [2*]; HAB 11 sta. B2: MNRJ 16268 [1*p]; Rio das Ostras: MZSP 63323 [1]; Arraial do Cabo , 2011: MZSP 155541 [1].

Remarks. Cerithiopsis rabilleri was described based on a single shell from Martinique. The original description mentioned the presence of minute grains in the suture of the protoconch. Although it is not visible in the printed plate of that species by Cecalupo & Perugia (2020), examination of high-resolution image of the holotype in the MNHN molluscs collection dataset (https://www.gbif.org/occurrence/2860632301) reveals the existence of very short axial threads in the suture of the somewhat eroded protoconch, which are also present in some shells from Brazil ( Fig. 7H–J ), depending on the preservational condition of the protoconch.

Cerithiopsis rabilleri is similar to Cerithiopsis gordaensis Rolán & Fernández-Garcés, 2010 , from Cuba. Both have similar teleoconch shape and sculpture. The minor differences are in the protoconch: C. gordaensis has 2.5–3 protoconch whorls, while in Cerithiopsis rabilleri has up to 5 whorls ( Fig. 7G ); regarding other aspects of the protoconch, such as the smooth convex whorls, they are nearly identical.

Geographic and bathymetric distribution. Disjunct distribution, in the Tropical Northwestern Atlantic Province ( Martinique) and in the Tropical Southwestern Atlantic Province (Bahia and Rio de Janeiro states). From 2 m to 110 m.

Figures

FIGURE 7. Cerithiopsis rabilleri Cecalupo & Perugia, 2020. A–C, F: shells from Rio de Janeiro state (A: MNRJ 17367; B–C: MNRJ 16268; F: MZSP 155541); D–E, G–J: shells from Bahia state (IBUFRJ 20651); G: body whorl of shell in D; H–I: protoconchs of shells in D and E, respectively; J: detail of sculpture of protoconch in I. Lengths of whole shells: A: 3.0 mm; B: 3.0 mm; C: 3.0 mm; D: 3.7 mm; E: 3.0 mm; F: 3.1 mm. Scale bars: A–F: 1 mm; G: 500 μm; H–I: 200 μm; J: 50 μm.