Eubela limacina Dall 1881

• Main Authors: Figueira, Raquel Medeiros Andrade, Absalão, Ricardo Silva
• Format: Text
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Raphitomidae; Eubela; Eubela limacina; Nautilus; Ricardo; Sudeste; Northwest Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5632952; https://zenodo.org/record/5632952

Eubela limacina (Dall, 1881) (Figs. 9–11) Pleurotoma ( Bela ) limacina Dall, 1881: 55; Daphnella limacina : Verrill (1882: 452); Dall (1889: 106, pl. IX, fig. 10); Eubela limacina : Powell (1966: 129, fig. A 3–60, pl. 20, fig. 24); Absalão et al . (2005: 33, fig. 89); Rios (2009: 347, species 900); Pleurotoma ( Defrancia ) hormophora Watson, 1881: 457. Clathurella hormophora (Watson, 1881): Watson (1886: 351, pl. XXI, figs. 9 a–c). Type material : Syntypes MCZ 7108, MCZ 7109, MCZ 7110, MCZ 7111 Type locality : Gulf of Mexico, Blake sta. 2, 1472 m; Yucatan Strait, 1170 m; Gulf Stream, 817 m. Material examined : Type material and 18402 [6] OP II # 44; 18403 [44] OP II # 49; 15919 [2] OP II # 67; 15540 [3] OP II # 69; 17307 [3] OP II # 74; 18404 [1] OP II # 75; 17170 [14] OP I # 44; 15051 [22] OP I # 49; 17055 [2] OP I # 59; 15348 [7] OP I # 74; 18405 [1] OP I # 75; 18406 [2] B # 32; 13847 [2] 13 ° 22 ’S 38 ° 36 ’W, 750 m, 02–03/VIII/ 2001. Description : Shell high, turreted, white, up to 7.32 mm long. Protoconch with 4.5 whorls, yellow. Protoconch 1 with rows of tiny crosses. Protoconch 2 with somewhat curved axial riblets crossed by fine spiral threads on the posterior portion of the whorls and with diagonal reticulation on the anterior portion. Clear-cut proto-teleoconch boundary. Teleoconch with up to five whorls, slightly convex, with a subsutural row of beads, which is covered by numerous very fine spiral threads. Suture very shallow. Base smooth, short and convex, with inflexion to form a short anterior siphonal canal. Aperture elliptical (broken in the specimens studied here). Geographic distribution : Northwest Atlantic: Massachusetts (Verrill, 1882); Gulf of Mexico, Yucatan Strait, Gulf Stream (Dall, 1881, Dall, 1889); Santa Cruz, Florida (Dall, 1889). West Indies (Watson, 1886); Amapá, Brazil (Rios, 2009). Southwest Atlantic: Pernambuco (Watson, 1886); Bahia (Absalão et al ., 2005), Campos Basin, Rio de Janeiro (this paper). Bathymetry : 20 m (Absalão et al ., 2005)– 1596 m (this paper). Discussion: The material studied here is composed almost entirely of young specimens, which match well with the original description of E. limacina (Dall, 1881: 55) and are very similar to the syntype (fig. 9). The only difference that we found was the presence of numerous fine spiral threads covering the subsutural row of beads. These threads were only observed in the SEM photomicrographs, and it is understandable that they were not reported by Dall. Three species of the genus Eubela are reported for the western Atlantic (Rosenberg, 2009): Eubela limacina (Dall, 1881), E. calyx (Dall, 1889) and E. mcgintyi Schwengel, 1943. E. mcgintyi (Schwengel, 1943, pl. 7, figs. 4–5) does not have the subsutural row of beads observed in E. limacina. Both E. mcgintyi and E. calyx have spiral ornamentation on the fasciolar region, whereas E. limacina is completely smooth aside from the subsutural sculpture. Eubela limacina was reported from Massachusetts, USA to Bahia, Brazil (41 °N– 13 °S). Its distribution is here expanded further South to include Rio de Janeiro (21 °– 22 °S). Its bathymetric range is also increased. The deepest depth previously reported was 1472 m (Dall, 1881) and it has now been found at 1596 m. : Published as part of Figueira, Raquel Medeiros Andrade & Absalão, Ricardo Silva, 2012, Deep-water Raphitomidae (Mollusca, Gastropoda, Conoidea) from the Campos Basin, southeast Brazil, pp. 1-27 in Zootaxa 3527 on pages 9-10, DOI: 10.5281/zenodo.210977 : {"references": ["Dall, W. H. (1881) Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico, and in the Caribbean Sea, 1877 - 79, by the United States Coast Survey Steamer ' Blake'. Bulletin of the Museum of Comparative Zoology, 9, 33 - 144.", "Verrill, A. E. (1882) Catalogue of Marine Molluscs added to the fauna of New England during the past ten years. Transactions of the Connecticut Academy of Arts and Sciences, 5 (2), 447 - 587.", "Dall, W. H. (1889) Reports on the results of dredgings, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877 - 78) and in the Caribbean Sea (1879 - 80), by the U. S. Coast Survey Steamer ' Blake'. Bulletin of the Museum of Comparative Zoology, 18, 1 - 492, pls. 10 - 40.", "Powell, A. W. B. (1966) The molluscan families Speightiidae and Turridae. An evaluation of the valid taxa, both recent and fossil, with lists of characteristic species. Bulletin of the Auckland Institute and Museum, 5, 1 - 184.", "Absalao R. S., Pimenta, A. D. & Caetano, C. H. S. (2005) Turridae (Mollusca, Neogastropoda, Conoidea) coletados no litoral Sudeste do Brasil, Programa REVIZEE \" score \" central. Biociencias, 13 (1), 19 - 47.", "Rios, E. C. (2009) Compendium of Brazilian sea shells. pp. 668. Fundacao Universidade do Rio Grande, Rio Grande.", "Watson, R. B. (1881) Mollusca of H. M. S. Challenger Expedition. Parts VIII-X. Journal of the Linnean Society (London), 15, 388 - 475.", "Watson, R. B. (1886) Report on the Scaphopoda and Gasteropoda collected by H. M. S. Challenger during the years 1873 - 1876. Report on the scientific results of the voyage of H. M. S. Challenger during the years of 1873 - 1876, 15 (42), 1 - 680, 53 pls.", "Rosenberg, G. (2009) Malacolog 4.1.1: A Database of Western Atlantic Marine Mollusca. [WWW database (version 4.1.1)] URL http: // www. malacolog. org /", "Schwengel, J. S. (1943) New marine shells from Florida. The Nautilus, 56, 75 - 78, pl. 7."]}