Duplicaria herberti Malcolm, Terryn &amp; Fedosov 2019, new species
Creators: name: Fedosov, Alexander E
name: Malcolm, Gavin
name: Terryn, Yves
name: Gorson, Juliette
name: Modica, Maria Vittoria
name: Holford, Mandë
name: Puillandre, Nicolas
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Terebridae
Duplicaria
Duplicaria herberti

description: <i>Duplicaria herberti</i> Malcolm, Terryn &amp; Fedosov new species (Fig. 11 A–C) <i>Duplicaria mozambiquensis—</i> Aubry, 1992: Fig. 9. Aubry <i>etal.</i>, 2006: pl. 16. (Both not Bratcher &amp; Cernohorsky, 1982). <i>Type material</i>: Holotype: MNHN IM-2013-52381, lv, 29.7 mm; Inhaca I., Mozambique, 26°00.0'S, 32°54.4'E, 4 m (INHACA 2011 Stn MR15). Paratypes 1–3: Inhaca I., Mozambique, 26°03.1'S, 33°01.0'E, 50–53 m (INHACA 2011, Stn MD13). Paratype 1: MNHN IM-2013-52373, lv, 17.4 mm. Paratype 2: MNHN IM-2013-52379, lv, 23.0 mm. Paratype 3: MNHN IM- 2013-52383, lv, 28.2 mm. Paratype 4: MNHN IM-2013-52385, 1 lv, 30.8 mm; type locality. Paratype 5: MNHN IM-2013-52405, lv, 24.0 mm; 26°05.0'S, 32°59.0'E, 0–35 m (INHACA 2011 Stn MA15). Paratypes 6–19: YT, 14 lv, 22.4–32.5 mm; Inhaca I., Mozambique, 6–8 m. Paratype 20: SG, lv, 24.0 mm; off Inhaca I., Mozambique, 25°59'59.3''S, 32°54'43.2''E, 4 m. Paratypes 21–25: JR, 4 lv, 30.0– 39.5 mm; off Inhaca I., Mozambique, 4–8 m. Paratype 26: GM, lv, 26 mm; Inhambane, Mozambique. Paratype 27: YT, dd, 32.0 mm; off Durban Bluff, Natal, South Africa, in sand dredging at bay-head dump. <i>Zoobank registration:</i> urn:lsid:zoobank.org:act: C26159E5-4A5A- 4218-AC7F-A76103809749 <i>Diagnostic nucleotide positions:</i> Table 11. <i>Description:</i> Shell of medium size. Protoconch paucispiral, about 1.0–1.5 broad whorls. Teleconch of holotype 11 whorls. Outline of teleoconch whorls straight. Spiral sculpture absent. Subsutural band with axially elongated nodes corresponding to axial ribs on remainder of whorl. Subsutural band bordered by deep and wide depression lacking punctations. Straight axial ribs stretching across whorl, sharply angular adapically and becoming more rounded abapically; ribs half as wide as interspaces; 17 ribs on penultimate whorl of holotype. Axial growth lines pronounced throughout whorl height. Aperture wide, somewhat quadrate, brown with white band; columella straight with visible fold. Shell colour dark, later whorls blackish brown with spiral whitish line at the periphery. <i>Habitat</i>: Depth 0– 55 m. <i>Distribution</i>: S Mozambique to off Durban, South Africa. <i>Etymology</i>: The species honours Dr David G. Herbert (formerly Chief Curator of Mollusca, NMSA), who contributed with detailed observations on the <i>D</i>. <i>mozambiquensis</i> type series at NMSA and provided additional historical information. <i>Remarks</i>: Shell colour varies: juveniles are beige to fawn, but light brown specimens are known. This species has been confused with <i>D. mozambiquensis</i>. The holotype of <i>D. mozambiquensis</i> (NMSA H7843/T2541) is a small, slender shell of 22.3 mm, but the type series shows a large discrepancy in many features between this holotype and all the paratypes—which are specimens of <i>D. herberti</i> n. sp. Subsequent authors have to our knowledge always featured specimens of <i>D. herberti</i> n. sp. as ‘ <i>D. mozambiquensis</i> ’, which should be considered a rarely encountered species. The whorls of <i>D. mozambiquensis</i> (Fig. 11D) have a narrower apical angle, its convex axial ribs giving an extremely rounded convex outline. The subsutural band comprises round nodes, compared with elongated nodes on <i>D</i>. <i>herberti</i> n. sp. The axial ribs of <i>D. herberti</i> n. sp. become straight, creating an angular projection posteriorly. The peripheral white band in <i>D. mozambiquensis</i> is wider and more clearly defined. Both have a subsutural furrow with minute axial growth striae, appearing as a punctate groove in <i>D</i>. <i>mozambiquensis</i>, while this feature is not present in <i>D. herberti</i> n. sp. We have no confirmation that <i>D. mozambiquensis</i> has ever been found in southern Mozambique, while specimens of <i>D. herberti</i> n. sp. are found extensively in southern Mozambique and South Africa. Within <i>Duplicaria</i>, several species change the sculpture of their whorls as they grow and do so at variable rates. However, a comparison of the two species highlights differences in the early whorls and protoconch. The protoconch of <i>D. mozambiquensis</i> is about 30% narrower than that of <i>D</i>. <i>herberti</i> n. sp. and the latter has a broader, inflated shape. The early whorls of <i>D. mozambiquensis</i> have distinctive round nodes compared with convex ribs on <i>D. herberti</i> n. sp.
description: Published as part of <i>Fedosov, Alexander E, Malcolm, Gavin, Terryn, Yves, Gorson, Juliette, Modica, Maria Vittoria, Holford, Mandë &amp; 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)</i> on pages 23-24, DOI: 10.1093/mollus/eyz004, http://zenodo.org/record/4469844
description: {"references": ["AUBRY, U. 1992. Terebras of the South African coasts. World Shells, 3: 38 - 44."]}