Episiphon didymum (Watson, 1879)

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 : 26-27

publication ID

http://doi.org/ 10.5281/zenodo.173183

publication LSID

lsid:zoobank.org:pub:DD06702D-A18D-4323-9CAE-D8F315FCCCC7

DOI

http://doi.org/10.5281/zenodo.6258426

persistent identifier

http://treatment.plazi.org/id/CC6E8784-FFE3-FFA2-FF54-FA65FD7AD021

treatment provided by

Plazi

scientific name

Episiphon didymum (Watson, 1879)
status

 

Episiphon didymum (Watson, 1879)  

Fig. 57 View FIGURES 57 – 73

+ 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. 782 a, 782 b.

Type material

Syntypes BMNH 1887.2.9.43– 44, 2 dd.

Type locality

off Culebra Island, Challenger sta 24, 18 º 38 ’ 30 "N, 65 º05’ 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 C 13, 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.

Kingdom

Animalia

Phylum

Mollusca

Class

Scaphopoda

Order

Dentaliida

Family

Gadilinidae

Genus

Episiphon

Loc

Episiphon didymum (Watson, 1879)

Caetano, Carlos Henrique Soares, Scarabino, Victor & Absalão, Ricardo Silva 2006
2006
Loc

Episiphon didymus

Redfern 2001: 190
2001
Loc

Episiphon didymum

Scarabino 1985: 200
1985
Loc

Dentalium (Episiphon) johnsoni

Emerson 1952: 5
1952
Loc

Dentalium (Bathoxiphus) didymum

Henderson 1920: 83
1920
Loc

var. didymum:

Pilsbry and Sharp 1897: 123
1897
Loc

Dentalium didymum

Watson 1879: 517
1879