Gradaterebra Cotton & Godfrey, 1932

Fedosov, Alexander E, Malcolm, Gavin, Terryn, Yves, Gorson, Juliette, Modica, Maria Vittoria, Holford, Mandë & Puillandre, Nicolas, 2019, Phylogenetic classification of the family Terebridae (Neogastropoda: Conoidea), Journal of Molluscan Studies The Malacological Society of London 85 (4), pp. 359-388 : 21-22

Genus Gradaterebra Cotton & Godfrey, 1932

( Fig. 10D )

Type species: Gradaterebra scalariformis Cotton & Godfrey, 1932 ; OD.

Diagnosis: Shell small (<25 mm), often dull-coloured, with flattened tobulbouswhorls; axialsculptureof prominentribs; spiralsculpture absent, microscopic or represented by fine cords; last whorl inflated.

Distribution: Indian and SW Pacific Oceans.

Remarks. The genus mainly comprises small species from Australia and South Africa, which can be differentiated based on adult size <25 mm.

Included species:

Gradaterebra scalariformis (Cotton & Godfrey, 1932) 4 n. comb.; G. assecla (Iredale, 1924) 4 n. comb.;

G. capensis (E. A. Smith, 1873) 4 n. comb.;

G. easmithi (Aubry, 1999) 4 n. comb.;

G. kowiensis (Turton, 1932) 4 n. comb.;

G. lightfooti (E. A. Smith, 1899) 4 n. comb.;

G. ninfae (Campbell, 1961) 4 n. comb.;

G. pilsbryi (Aubry, 1999) 4 n. comb.;

G. planecosta (Barnard, 1958) 4 n. comb.;

G. severa (Melvill, 1897) 4 n. comb.;

G. sorrentense (Aubry, 1999) 4 n. comb.;

G. taylori (Reeve, 1860) 4 n. comb.

Figures

Figure 10. Genera defined solely by shell morphology. A. Terebra bathyrhaphe lectotype, NHMUK 1873.8.6.10/1, Gulf of Yedo, 35◦35'N, 139◦48'E, 6–25 fms (= 11–46 m), 24.8 mm. B. Hastulopsis melanachme lectotype, NMHUK 1873.8.6.11/1, Cape Sima, Japan, 18 fms (= 33 m), 17.8 mm. C. Terebra bifrons holotype, NHMUK 1968237, Japan, 51.0 mm. D. Gradaterebra scalariformis, SAM D-110176, Newland Head, S Australia, 20 fms (= 37 m), 12.1 mm. E. Terebra circumcincta holotype, NHMUK 1978150, Red Sea (erroneous?), 38.0 mm. F. Microtrypetes iola holotype, ANSP 155289, Mazatlan, Mexico, 20 fms (= 37 m), 14.0 mm.