Bostrycapulus, Olsson & Harbison, 1953

Collin, Rachel, 2005, Development, phylogeny, and taxonomy of Bostrycapulus (Caenogastropoda: Calyptraeidae), an ancient cryptic radiation, Zoological Journal of the Linnean Society 144 (1), pp. 75-101 : 95

BOSTRYCAPULUS CF. TEGULICIUS

Synonymy

Crepidula aculeata - Hoagland, 1977 [in part]: 364. Hoagland, 1983 [in part].

Crepidula cf. tegulicia - Collin, 2003a: 541–593. Collin, 2003b: 618–640.

Original description (of Crypta tegulicia Rochebrune, 1883 ): ‘Testa subovata, crassiuscula, irregulari, oblique curvata, extus albida, concentrice striata, et squamis minutis teguliformibus, subdistantibus orniata; intus nitide castaneo violacea; lamella opalina, ad medio et ad latus subemarginata. Long 0.019, Lat 0.014’.

Type: two syntypes of B. tegulicius are in the Paris museum ( Hoagland, 1983; P. Bouchet 2001 pers. comm.). One is figured in Hoagland (1983).

Type locality: ‘ Dakar, Joalles , Pointe de Cap Vert’, Senegal .

Diagnosis and description: B. cf. tegulicius can be distinguished from other species in the B. aculeatus species complex by the large globose protoconch and distinct COI sequence. Material with other potentially diagnostic features is not currently available. Diagnostic DNA sequence differences are difficult to determine, but the single available sequence distinguishing B. cf. tegulicius from all other Bostrycapulus species is in the following positions in the COI sequences submitted to GenBank (position 1 = position 1537 of the D. yakuba mitochondrial genome, GenBank # X03240 ): 178 (a), 268 (t), 282 (c), 339 (g), 492 (a), 583 (a).

Distribution: Cape Verde Islands. The extent of the distribution along the west coast of Africa is unknown.

Notes: B. tegulicius was originally described from Senegal. As diagnostic material from this country is not currently available, the identity of the Cape Verdian material described here cannot be unambiguously assigned to a new species. It is quite possible that they are different species, since the Cape Verdian animals have direct development (and therefore, presumably limited dispersal) and many Cape Verdian species are endemic to these islands. If animals from Senegal and Cape Verde are demonstrated to belong to different species, the name B. tegulicius should be applied to material from mainland Africa while the species from Cape Verde should be given a new name.