Serratovola rubicunda (Récluz in Chenu, 1843)
CHENU, J. C. 1842-1854. Illustrations conchyliologiques ou descriptions et figures de toutes les coquilles connues vivantes et fossiles, classées suivant le système de Lamarck. Tome Deuxième. A. Franck, Libreaire-Éditeur, Paris [p. 3, pl. 7, figs. 4-5]
1838 Pecten tricarinatus Anton, 1838
1842 Pecten asper G. B. Sowerby II, 1842
1843 Pecten rubicundus Récluz in Chenu, 1843 [nomen novum pro Pecten asper G. B. Sowerby II, 1842]
1845 Pecten passerinus Hynds, 1845 [nomen novum pro Pecten asper G. B. Sowerby II, 1842]
1842 Pecten asper G. B. Sowerby II, 1842
1843 Pecten rubicundus Récluz in Chenu, 1843 [nomen novum pro Pecten asper G. B. Sowerby II, 1842]
1845 Pecten passerinus Hynds, 1845 [nomen novum pro Pecten asper G. B. Sowerby II, 1842]
«Remarks. —̶ Anton (1838) overlooked Pecten tricarinatus Defrance, 1825, a fossil pectinid from the environs of Rome, which has nomenclatural priority.
Sowerby’s (1842) species name P. asper was preoccupied by Lamarck (1819) for a fossil pectinid (see also ICZN Opinion 311). Récluz (1843) and Hinds (1845) both introduced a new replacement name for P. asper Sowerby (P. rubicundus and P. passerinus respectively). Récluz’ name, P. rubicundus, has priority and should be used for the present species. Type data. —̶ Pecten tricarinatus Anton: Lectotype (H 28.8 mm, pv) SMTD 6937, designated by Dijkstra (1998a: 29), figured in Dijkstra (2008: 59, figs 19-24). Type locality: China.
Pecten asper Sowerby: Possible syntypes (7 pv) BMNH 20080065, figured in Dijkstra (2008: 59, figs 13-18). Type locality: “New Guinea”. Material examined. — Philippines: PMBP 2004, Stn T6, 34-82 m, 8 v; Stn T7, 61-62 m, 1 v; Stn T9, 97-120 m, 3 v; Stn T11, 78-95 m, 5 v; Stn T14, 101-110 m, 6 v; Stn T18, 80-100 m, 4 v; Stn T25, 160-210 m, 2 v; Stn T28, 80 m, 1 pv (A), 8 v; Stn T29, 77-84 m, 2 v; Stn T30, 59-65 m, 1 v; Stn T43, 70-96 m, 1 v; Stn T44, 83-86 m, 1 v. PANGLAO 2005, Stn CP 2362, 679-740 m, 1 v; Stn DW 2371, 172-175 m, 1 v; Stn CP 2408, 121-137 m, 1 v.
Description. —̶ Shell up to c. 35 mm high, circular, inequivalve, equilateral, left valve flat or very weakly inflated, right valve convex, auricles almost equal in size, unequal in shape; umbonal angle c. 115˚; internal rib carinae prominent; hinge teeth weak; left valve with numerous red dots and/or streaks, right valve paler or whitish. Left valve sculptured with 17-18 evenly spaced radial costae of angular section (with sloping sides and narrow crests), solid or with hollow sections laterally. Each interspace slightly wider than one costa; interspaces bearing widely spaced commarginal lamellae; more closely spaced lamellae present on costae late in ontogeny. Posterior auricle slightly larger and closely similar in shape to anterior one, both with similar sculpture of closely spaced commarginal lamellae and a few very weak radial ridges. Right valve with 18-19 evenly spaced radial costae, angular in section in early growth stage but with more rounded crests in late ontogeny, with similar microsculpture to left
valve. Byssal notch very shallow, functional ctenolium lacking. Distribution. — Tropical Indo-West Pacific from southern Japan southwards to northern Australia, and eastwards to Tonga. Southern Japan, Taiwan, East and South China Sea, Philippine Islands and Borneo: 10-100 m (Bernard, Cai & Morton, 1993: 52); Papua New Guinea: 45-100 m (Dijkstra, 1998a: 29); Solomon Islands: 191-381 m, dead, Fiji: 80-120 m, and Tonga: 79-82 m (Dijkstra & Maestrati, 2008: 111). Present specimen from the Philippines alive at 80 m. Living rarely in shallow waters, more frequent in deep water to upper bathyally, on bottoms of soft sediments (sand and/or mud). Remarks. — The present material from the Philippines is identical to S. rubicunda in all characters. In the literature, Serratovola species from the Indo-West Pacific are often misidentified or references are mixed. For clarification of different taxa see Dijkstra (2008: 60).» DIJKSTRA, H. H. 2013. Pectinoidea (Bivalvia: Propeamussiidae and Pectinidae) from the Panglao region, Philippine Islands. Vita Malacologica, 10: 1-108, pls. 1-32. [p. 55, 57]
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Serratovola rubicunda (Récluz in Chenu, 1843); H. H. Dijkstra, 2013, Pectinoidea from the Panglao region, Philippine Islands, plate 15, figures 2a-2d; plate 17, figures 4a-4b (juvenile).
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«DISTRIBUTION.— Japan, Philippines, South China Sea, Indonesia and Papua New Guinea (Dijkstra 1998: 29); live in 30- 140 m (Dijkstra unpubl. data). New records for the Solomon Islands, Fiji and Tonga. Present material live in 80-82 m.
DESCRIPTION.— Shell up to 35 mm in height, circular, inequivalve and equilateral, right valve much more convex than almost flat left valve, auricles small and nearly equal in size, umbonal angle 110º-120º, left valve coloured with numerous delicate red spots and/or streaks, right valve paler or more whitish. Left valve sculptured with 17-18, regularly spaced, angular radial ribs solid or with hollow sections laterally. Interspaces slightly wider than one radial rib, bearing widely spaced, commarginal lamellae, lamellae also present on ribs near ventral margin where they are more closely spaced. Anterior and posterior auricle almost the same size, both with similar sculpture of closely spaced, commarginal lamellae and some very weak radial ridges. Right valve with 18-19, regularly spaced, radial ribs, angular in early ontogeny, more rounded in late ontogeny, with similar sculpture as on left valve. Auricles with similar sculpture to that on left valve. Byssal notch very weak, ctenolium lacking in adult stage. REMARKS.— The present material is similar to the type specimen, although somewhat paler in colour. The radial ribs of the right valve are highly variable: angular with hollow sections laterally (usually in early ontogeny), or rounded without these hollow sections. Both are observed in the present material, even in one specimen (stn DW 1357). For comparison with Serratovola gardineri (Smith, 1903) from the Maldive Islands and Serratovola pallula Dijkstra,1998 from Papua New Guinea and northern Australia, see Dijkstra (1998).» DIJKSTRA, H. H. & P. MAESTRATI. 2008. New species and new records of deep-water Pectinoidea (Bivalvia: Propeamusiidae, Entoliidae and Pectinidae) from the South Pacific. In: V. Héros, R. H. Cowie & P. Bouchet (eds), Tropical Deep-Sea Benthos 25. Mémoires du Muséum national d'Histoire naturelle, 196: 77-113, figs. 1-55. Paris. [p. 111]
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Serratovola rubicunda (Récluz in Chenu, 1843); H. H. Dijkstra & P. Maestrati, 2008, New species and new records of deep-water Pectinoidea from the South Pacific, figures 46, 47.
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