Antalis taphria (Dall, 1889)

Caetano, Carlos Henrique Soares, Scarabino, Victor & Absalão, Ricardo Silva, 2006, Scaphopoda (Mollusca) from the Brazilian continental shelf and upper slope (13 º to 21 ºS) with descriptions of two new species of the genus Cadulus Philippi, 1844, Zootaxa 1267, pp. 1-47 : 16-17

Antalis taphria (Dall, 1889)

Figs. 29–32

+ Dentalium taphrium Dall 1889: 422 ; Pilsbry and Sharp 1897: 58.

+ Dentalium (Antalis) taphrium : Henderson 1920: 53, pl. 7, fig. 8; Maury 1922: 35; Turner 1955: 312; Penna­Neme 1974: 108.

+ Antalis taphrium : Scarabino 1985: 198, pl. 72, fig. 1015; 1994: 306, pl. 106, fig. 1502; Cabral and Mello 1994: 35, fig. 5.

+ Antalis taphris : Steiner and Kabat 2001: 440.

+ Antalis taphria : Steiner and Kabat 2004: 653.

Type material

Lectotype USNM 95320 (designated by Henderson, 1920: 53); Paralectotypes USNM 92819, 2 dd, USNM 93119, 2 dd, USNM 93120, 14 dd, MCZ 7690, 8 dd.

Type locality

Between Mississipi delta and Cedar Keys, USA, USBF sta 2405, 28 º45’N, 85º02’W, 55 m (subsequent designation by Henderson, 1920: 53).

Diagnosis

Shell to 21 mm long, regularly tapering, curvature accentuated towards posterior end, fresh specimens translucent light apple green. Smooth primary ribs (12–14), secondary ribs present, all fade near oral aperture. Intercostals spaces straight, reticulate sculptured. Apex polygonal, shallow V­shaped notch at convex side. Oral section circular.

Material examined

Paralectotype MCZ 7690 of Antalis taphria ; IBUFRJ 10576, sta C22f,1 dd; IBUFRJ 10705, sta C36r, 4 dd; IBUFRJ 14254, sta 34, 1 lv, 11 dd; IBUFRJ 14255, sta 45, 1 lv, 3 dd; IBUFRJ 14256, sta Y7, 2 dd; IBUFRJ 14257, sta 42, 2 lv, 37 dd; IBUFRJ 14258, sta C76, 3 dd; IBUFRJ 14260, sta C13, 1 dd; IBUFRJ 14261, sta 13, 1 dd; IBUFRJ 14262, sta C34, 1 dd.

Distribution

USA: North Carolina, Florida (Henderson 1920); Caribbean Sea: Cuba, off Habana (Dall 1889); Puerto Rico (Dall & Simpson 1902); Yucatan (Turner 1955); Brazil: Fernando de Noronha, Atol das Rochas (Matthews & Kempf 1970), Amapá to Rio de Janeiro (Penna­Neme 1974; Scarabino 1975, 1985, 1994). Living 41 to 90 m, shells, probably washed down, 1170 m.

Remarks

This species is close to A. cerata differing from it by a shorter shell length, higher expansion rate, higher curvature mainly at the posterior fourth, greater number of ribs (9–12 in A. cerata and 12–14 in A. taphria ), green color in fresh specimens and relatively shorter smooth portion of shell.

Figures

FIGURES 20 – 38. Genus Antalis and Coccodentalium. (20 – 22) Antalis cerata, IBUFRJ 14253, 27 mm; (23 – 28) Antalis circumcincta, (23) Lectotype BMNH 1887.2. 9.30, 48 mm, (24) Paralectotype BMNH 1887.2. 9.29, 46 mm, (25 – 28) IBUFRJ 14302, 48 mm; (29 – 32) Antalis taphria, IBUFRJ 14254, 16 mm; (33 – 38) Coccodentalium carduus, IBUFRJ 14245, 89 mm. Scale bar = 100 m.