Strophomena pectenoides Andreeva 1961

• Main Author: Modzalevskaya, Tatiana L.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2003
• Subjects: Biodiversity; Taxonomy; Animalia; Brachiopoda; Strophomenata; Strophomenida; Strophomenidae; Strophomena; Strophomena pectenoides; Arctic; October Revolution Island; Severnaya Zemlya; Siberia
• Online Access: https://doi.org/10.5281/zenodo.5463794; http://treatment.plazi.org/id/03A0162AE944FFAADB04FA0F7F3B1A58

Strophomena pectenoides Andreeva in Nikiforova & Andreeva, 1961 (Fig. 2) Strophomena ? pectenoides Andreeva in Nikiforova & Andreeva, 1961: 184, pl. XXXIX, figs 1-6. — Lopushinskaya 1976: 39, pl. III, figs 16-19. MATERIAL EXAMINED. — 10 isolated valves from loc. 13, beds 21, 112, Matusevich River, loc. 32, bed 21, Ushakov River, October Revolution Island (Männik et al . 2002: figs 2, 5); Vodopad Formation. REMARKS The specimens have a well developed narrow interarea, small chilidium, and narrow pseudodeltidium. There is a flattened dorsal umbo and a convex median part passing into a prominent sulcus. The shell is covered by fine rounded ribs which intercalate with even finer secondary ones. Low massive dental plates, teeth, and a large subquadrate muscle field with small oval adductors are developed in the ventral interior. The shells are similar to Strophomena kulumbensis Lopushinskaya, 1967 from Chamba, Talikit and Meik formations of East Siberia, but differ from that in possessing more frequent, unequal multicostellae and a chilidium larger than the pseudodeltidium (Lopushins k a y a 1 9 6 7: 8 9, p l. X X, f i g s 3-6). O. N. Andreeva (Nikiforova & Andreeva 1961: 185) attributed pectenoides to Strophomena with a query, because there were no specimens with a ventral muscle field, and noted their resemblance to Coolinia pecten (Linnaeus, 1758). However, the available facts show that the taxon belongs to Strophomena . Published as part of Modzalevskaya, Tatiana L., 2003, Silurian and Devonian brachiopods from Severnaya Zemlya (Russian Arctic), pp. 73-107 in Geodiversitas 25 (1) on page 76, DOI: 10.5281/zenodo.5375016