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 Author Caetano, Carlos Henrique Soares Author Scarabino, Victor Author Absalão, Ricardo Silva text Zootaxa 2006 1267 1 47 journal article 10.5281/zenodo.173183 e66afec9-257b-473d-978b-1940bac0537b 1175­5326 173183 Episiphon didymum (Watson, 1879) Fig. 57 + Dentalium didymum Watson 1879: 517 ; 1886: 10, pl. 1, fig. 11. + Dentalium ensiculus var. didymum : Pilsbry and Sharp 1897: 123 , pl. 7, fig. 20. + Dentalium (Bathoxiphus) didymum : Henderson 1920: 83, pl. 14, fig. 10; Maury 1922: 39; Turner 1955: 314. + Dentalium (Episiphon) johnsoni Emerson 1952: 5 , pl. 1, fig. 2; Penna­Neme 1974: 114. + Episiphon didymum : Scarabino 1985: 200, pl. 73, fig. 1024; 1994: 308, pl. 107, fig. 1512; Díaz and Puyana 1994: 257, pl. 71, fig. 1044; Steiner and Kabat 2001: 444; 2004: 584. + Episiphon didymus : Redfern 2001: 190, pl. 76, figs. 782a, 782b. Type material Syntypes BMNH 1887.2.9.43–44, 2 dd. Type locality off Culebra Island, Challenger sta 24, 18 º38’30"N, 65º05’30"W , 712 m (by original designation). Diagnosis Shell to 10 mm long, slender, solid, almost straight, yellow­white, smooth, glossy. Apical, oral diameters nearly equal. Apical callous present, non­centric, lumen small. An extended pipe often present. Section subtriangular to suboval throughout. Material examined IBUFRJ 14310, sta C13, 1 dd. Distribution Caribbean Sea: South Dry Tortugas (Turner 1955); Porto Rico (Emerson 1952); Barbados (Henderson 1920); North of St. Thomas, Virgin Islands (Emerson 1952), off Culebra Island (Watson 1879; Emerson 1952); Colombia (Díaz & Puyana 1994); Bahamas (Redfern 2001); Brazil : off Amapá and Maranhão (Penna­Neme 1974; Scarabino 1985, 1994), Bahia (this study). Living 439 m (Emerson 1952), shells 60 to 830 m (Emerson 1952; Penna­Neme 1974). Remarks Emerson (1952) stated that mature specimens range from 17 to 28 mm long, with the Brazilian specimen being shorter. The shell illustrated by Abbott (1974: 387, fig. 4525) as Dentalium (Bathoxiphus) didymum do not fit to this species, being notably more curved.