Eubela limacina ( Dall, 1881 )

Figueira, Raquel Medeiros Andrade & Absalão, Ricardo Silva, 2012, Deep-water Raphitomidae (Mollusca, Gastropoda, Conoidea) from the Campos Basin, southeast Brazil, Zootaxa 3527, pp. 1-27 : 9-10

publication ID

https://doi.org/ 10.5281/zenodo.210977

DOI

https://doi.org/10.5281/zenodo.5632953

persistent identifier

https://treatment.plazi.org/id/8E7187D8-8E37-674F-47C0-E511FB676C08

treatment provided by

Plazi

scientific name

Eubela limacina ( Dall, 1881 )
status

 

Eubela limacina ( Dall, 1881) View in CoL

( Figs. 9–11 View FIGURES 1 – 11. 1, 2 )

Pleurotoma (Bela) limacina Dall, 1881: 55 View in CoL ;

Daphnella limacina: Verrill (1882: 452) ; Dall (1889: 106, pl. IX, fig. 10);

Eubela limacina: Powell (1966: 129, fig. A3–60, pl. 20, fig. 24) View in CoL ; Absalão et al. (2005: 33, fig. 89); Rios (2009: 347, species 900);

Pleurotoma (Defrancia) hormophora Watson, 1881: 457 View in CoL .

Clathurella hormophora ( Watson, 1881) : Watson (1886: 351, pl. XXI, figs. 9a–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.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Neogastropoda

Family

Raphitomidae

Genus

Eubela

Loc

Eubela limacina ( Dall, 1881 )

Figueira, Raquel Medeiros Andrade & Absalão, Ricardo Silva 2012
2012
Loc

Eubela limacina:

Absalao 2005: 33
2005
Loc

Clathurella hormophora (

Watson 1886: 351
1886
Loc

Daphnella limacina:

Verrill 1882: 452
1882
Loc

Pleurotoma (Bela) limacina

Dall 1881: 55
1881
Loc

Pleurotoma (Defrancia) hormophora

Watson 1881: 457
1881
GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF