Malletia obtusa Sars M. in Sars G. O. 1872

• Main Authors: Negri, Mauro Pietro, Corselli, Cesare
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Nuculanoida; Malletiidae; Malletia; Malletia obtusa; Norway; Christiania; The Beak; Eusebio; Arktis*
• Online Access: https://dx.doi.org/10.5281/zenodo.6082134; https://zenodo.org/record/6082134

Malletia obtusa (Sars M. in Sars G. O., 1872) Fig. 2 i–k Yoldia obtusa Sars M. in Sars G.O., 1872 (p. 23, pl. 3, figs. 16–20). Malletia obtusa M. Sars—Jeffreys 1879 (p. 586). Malletia obtusa (M. Sars) — Verrill & Bush 1898 (p. 874, pl. 97, fig. 4). Malletia obtusa (M. Sars, 1868) — Nordsieck 1969 (p. 14, pl. 2, fig. 03.20). Malletia obtusa (Sars) — Di Geronimo & Panetta 1973 (p. 95, pl. 3, fig. 3). Malletia obtusa G.O. Sars, 1878 — Sanders & Allen 1985 (p. 232, figs. 40–41). Pseudomalletia pianii Van Aartsen & Giannuzzi-Savelli, 1991 (p. 4). Pseudomalletia pianii Van Aartsen & Giannuzzi-Savelli, 1991 — Giannuzzi-Savelli et al. 2001 (p. 54, fig. 50). Pseudomalletia pianii (Van Aartsen & Giannuzzi-Savelli, 1991) — Repetto et al. 2005 (p. 284, mid left fig). Pseudomalletia obtusa (G.O. Sars, 1878) — La Perna 2003 (p. 28, pl. 4, fig. 3). Diagnostic characters . Flattened, subrectangular, markedly inequilateral shell with posterior side longer and wider; anterior side obtusely pointed; shallow external sulcus from the beak to the upper third of the posterior side, faintly bilobed in some specimens; outer surface with uneven growth markings. Prodissoconch: shell type ST-1A; P-1: length about 260 µm; ellipsoidal outline; low convex profile; surface smooth; transition to the nepioconch well marked. Remarks . Pseudomalletia pianii Van Aartsen & Giannuzzi-Savelli, 1991 is a synonym of Yoldia obtusa Sars M., 1872 (CLEMAM 2016). The very similar Malletia johnsoni Clark, 1961 differs only in having a rounded anterior margin and a somewhat shorter posterior side; it is a deep water species that occurs between 1000 and 3000 m depth (Oliver et al . 2016). Occurrence . Box-corer samples BC71 (1 specimen), BC72 (4). Maximum length: 5.5 mm. Distribution and habitat . Malletia obtusa ranges from the northern Atlantic—also entering Norway fjordsto North American coasts, Cape Verde and the western Mediterranean, in the 20–3200 m depth interval (Verrill & Bush 1898; Nordsieck 1969; Di Geronimo & Panetta 1973; Poppe & Goto 1993; Buhl-Mortensen & Høisaeter 1993; La Perna 2003). Fossil record. Pleistocene of the Mediterranean (La Perna 2003). : Published as part of Negri, Mauro Pietro & Corselli, Cesare, 2016, Bathyal Mollusca from the cold-water coral biotope of Santa Maria di Leuca (Apulian margin, southern Italy), pp. 1-97 in Zootaxa 4186 (1) on page 17, DOI: 10.11646/zootaxa.4186.1.1, http://zenodo.org/record/165288 : {"references": ["Sars, G. O. (1872) On some remarkable forms of animal life from the great deeps off the Norwegian coast. Part 1, partly from posthumous manuscripts of the late prof. Mich. Sars. University Program for the 1 rs half-year 1869. Brogger & Christie, Christiania, 74 pp. http: // dx. doi. org / 10.1080 / 00222937308680754", "Verrill, A. E. & Bush, K. J. (1898) Revision of the deep-water Mollusca of the Atlantic coast of North America, with descriptions of new genera and species. Part I. - Bivalvia. Proceedings U. S. National Museum, 20 (1139), 775 - 901. http: // dx. doi. org / 10.5479 / si. 00963801.20 - 1139.775", "Nordsieck, F. (1969) Die europaischen Meeresmuscheln (Bivalvia) vom Eismeer bis Kapverden, Mittelmeer und Schwarzes Meer. Gustav Fischer Verlag, Stuttgart, XIII + 256 pp.", "Di Geronimo, I. & Panetta, P. (1973) La Malacofauna Batiale del Golfo di Taranto. Conchiglie, 9 (5 - 6), 69 - 121.", "Sars, G. O. (1878) Bidrag til kundskaben om Norges arktiske fauna. I. Mollusca regionis Arcticae Norvegiae. Oversigt over de i Norges arktiske region forekommende blOddyr. A. W. Brogger, Cristiania, XV + 466 pp. http: // dx. doi. org / 10.5962 / bhl. title. 42224", "Sanders, H. L. & Allen, J. A. (1985) Studies on deep-sea Protobranchia (Bivalvia); the family Malletiidae. Bulletin of the British Museum (Natural History) Zoology, 49 (2), 195 - 238.", "Van Aartsen, J. J. & Giannuzzi-Savelli, R. (1991) New names for well-known European marine Mollusca. Bollettino Malacologico, 27 (1 - 4), 1 - 8.", "Giannuzzi-Savelli, R., Pusateri, F., Palmeri, A., Ebreo, C. \u2020, Coppini, M., Margelli, A., Bogi, C. (2001) Atlante delle conchiglie marine del Mediterraneo. Vol. 7 (Bivalvia: Protobranchia-Pteriomorphia). Evolver, Roma, 246 pp.", "Repetto, G., Orlando, F. & Arduino, G. (2005) Conchiglie del Mediterraneo: 1770 specie illustrate con distribuzione e frequenza. Amici del Museo \" Federico Eusebio \", Alba, 392 pp.", "La Perna, R. (2003) The Quaternary deep-sea protobranch fauna from the Mediterranean: composition, depth-related distribution and changes. Bollettino Malacologico, 39 (1 - 4), 17 - 34.", "Oliver, P. G., Holmes, A. M., Killeen, I. J. & Turner, J. A. (2016) Marine Bivalve Shells of the British Isles (Mollusca: Bivalvia). Amgueddfa Cymru-National Museum Wales. Available from: http: // naturalhistory. museumwales. ac. uk / britishbivalves. (Accessed 25 August 2016)", "Poppe, G. T. & Goto, Y. (1993) European Seashells. Volume II. (Scaphopoda, Bivalvia, Cephalopoda). Verlag Christa Hemmen, Wiesbaden, 221 pp.", "Buhl-Mortensen, L. & Hoisaeter, T. (1993) Mollusc fauna along an offshore-fjord gradient. Marine Ecology Progress Series, 97, 209 - 224. http: // dx. doi. org / 10.3354 / meps 097209"]}