Radulopecten cf. fibrosus (J. Sowerby, 1816)

Fuersich, Franz T., Alberti, Matthias, Pandey, Dhirendra K. & Ayoub-Hannaa, Wagih S., 2022, Jurassic bivalves from the Spiti area of the Himalayas, northern India, Zitteliana 96, pp. 153-178 : 153

publication ID	https://dx.doi.org/10.3897/zitteliana.96.87253
publication LSID	lsid:zoobank.org:pub:191199E0-7F3E-4E09-A377-4ADFBF93A248
persistent identifier	https://treatment.plazi.org/id/3E76D885-A42A-5258-BB5D-C299F394B1A6
treatment provided by	Zitteliana by Pensoft
scientific name	Radulopecten cf. fibrosus (J. Sowerby, 1816)
status

Treatment

Plate 4, fig. 4a, b View Plate 4

cf. 1816 Pecten fibrosus - J. Sowerby: 84, pl. 136, figs 1-2.

Material.

A single fragment of a right valve from the lower? member near Demul (SNSB-BSPG 2020 XCIX 39).

Description and remarks.

Although the specimen does not allow to infer the shape of the bivalve, the ornamentation is so characteristic that it can be placed in the genus Radulopecten without any doubt. The shell is covered with broad, nearly flat-topped radial plicae, separated by much narrower shallow sulci. The radial plicae are crossed by spaced, narrow commarginal lamellae. The ornamentation closely resembles that of Radulopecten fibrosus (J. Sowerby, 1816). For this reason, the specimen is tentatively placed in that species.

Figures

Plate 4. (1) Camptonectes (Camptochlamys) sp. from the upper member close to Demul Pass (SNSB-BSPG 2020 XCIX 14). (2) Chlamys (Chlamys) cf. textoria (Schlotheim, 1820). Incomplete right valve from the lower member at Langza (SNSB-BSPG 2020 XCIX 11). (3) Spondylopecten (Plesiopecten) subspinosus (Schlotheim, 1820). Internal mould of right valve from the lower member at the Kaza-Hikkim road (SNSB-BSPG 2020 XCIX 23). (4) Radulopecten cf. fibrosus (J. Sowerby, 1816). a, b, Fragment of a right valve from the? lower member near Demul (SNSB-BSPG 2020 XCIX 39). (5) Pectinidae indet. Slightly distorted internal mould of a single valve from the lower member along the Kazan-Hikkim road (SNSB-BSPG 2020 XCIX 17). (6) Plagiostoma? sp. B. Strongly crushed single valve with remains of shell from the lower member at Langza (SNSB-BSPG 2020 XCIX 35). (7) Plagiostoma? sp. A. a, b, Fragmented left internal mould with remains of the inner shell layer from the Ferruginous Oolite Formation near Zangla (SNSB-BSPG 2020 XCIX 36). (8) Trigonia? sp. Right internal mould from the top of the Ferruginous Oolite Formation at Zangla (SNSB-BSPG 2020 XCIX 24). (9) Vaugonia (Orthotrigonia) sp. Poorly preserved right valve from the lower member at Langza (SNSB-BSPG 2020 XCIX 25). (10 - 13) Pruvostiella (Pruvostiella) hermanni (Oppel, 1863). 10. Hinge of left valve from the lower member close to the pass to Tashigeng; Aa, anterior adductor scar; Apr, anterior pedal retractor scar (SNSB-BSPG 2020 XCIX 54 b). 11. Hinge of left valve from the lower member at the Kaza-Hikkim road cut; Cpr, central pedal retractor scar (SNSB-BSPG 2020 XCIX 59). 12. Hinge of right valve from the lower member close to the pass to Tashigeng; Apr, anterior pedal retractor scar. a, lateral view; b, dorsal view (SNSB-BSPG 2020 XCIX 54 b). 13. Articulated specimen from the lower member at Langza (SNSB-BSPG 2020 XCIX 59 a). a, left valve view; b, dorsal view.