Partecosta bozzettii Fedosov & Malcolm & Terryn & Gorson & Modica & Holford & Puillandre 2019, new species

Partecosta bozzettii Malcolm & Terryn new species (Figs 3K, 11E) Type material: Holotype: MNHN IM- 2009-10163, lv, 12.5 mm; Port d’Ehoala, SMadagascar, 25 ° 03 ' 43.9 ''S, 46 ° 57 ' 42.9 ''E, 3–4 m (ATIMO VATAE Stn TP29). Paratype 1: MNHN IM-2009- 10162, lv, 11.8 mm; type locality. Zoobank registration: urn:lsid:zoobank.org:act: 6E3E67B5-1B55- 4A99-8D39-6517DA4D065C Diagnostic nucleotide positions: Table 11. Description: Shell small. Protoconch paucispiral, 1 whorl, with broad nucleus. Holotype 9 teleoconch whorls; outline of whorls weakly convex. No subsutural band, or demarcation thereof, except for minor indentation of ribs; no visiblespiral sculpture. Axial sculpture of almost straight, thin ribs, 14 on penultimate whorl, stretching across whorl height; interspaces wider than ribs. Last whorl elongate, tapering towards base. Columella straight, aperture elongate. Shell colour off-white with darker-tinged spiral band adapically on whorls and below periphery; brownish blotches between the axial ribs abapically on whorls; inner columella dark brown or purplish. Habitat: In sand at 3– 4 m. Distribution: Known only from type locality. Etymology: The species honours Luigi Bozzetti (Italy), who has contributed tremendously to the knowledge of the molluscan fauna of SMadagascar. Remarks: The species resembles P. trilineata (Fig. 11F), but differs by its more globose and convex whorls and by having a single row of brown blotches instead of two. In addition, the protoconch of P. trilineata is differently shaped, having two whorls and a medium nucleus. The phylogenetic analysis of Modica et al. (2019) shows significant genetic distance between the two species. Partecosta bozzettii n. sp. shows some resemblance to P. albofuscata, but again differs by its more convex whorls, distinct axial ribbing and shell colour pattern. Partecosta bozzettii n. sp. is similar in general morphology and shell colour pattern to Hastula daniae (Fig. 2G) from West Africa, but the latter has a multispiral protoconch and more globose mature whorls.
Published as part of 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), pp. 359-388 in Journal of Molluscan Studies The Malacological Society of London 85 (4) on page 24, DOI: 10.1093/mollus/eyz004, http://zenodo.org/record/4469844
{"references":["MODICA, M. V., GORSON, J., FEDOSOV, A. E., MALCOLM, G., TERRYN, Y., PUILLANDRE, N. & HOLFORD, M. 2019. Macroevolutionary analyses suggest environmental factors, not venom apparatus, play key role in Terebridae marine snail diversification. Systematic Biology. DOI: https: // doi. org / 10.1093 / sysbio / syz 059."]}