Promyalina schamarae ...

• Main Authors: Foster, William J., Danise, Silvia, Twitchett, Richard J.
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Myalinida; Myalinidae; Promyalina; Promyalina schamarae; Silvia; Svalbard
• Online Access: https://dx.doi.org/10.5281/zenodo.10903511; https://zenodo.org/doi/10.5281/zenodo.10903511

Promyalina schamarae (Bittner, 1899) (Fig. 2C–G) 1899 Myalina schamarae Bittner 19, pl. 4, figs 20–25. 2009 Promyalina schamarae (Bittner); Kumagae & Nakazawa: 157, fig. 144, 4–5. Material. Three specimens from LD-04 (NHMUK PE PEI 5484; NHMUK PI MB 1202; NHMUK PI MB 1205) and seven specimens from LD-05 (NHMUK PI MB 1188; NHMUK PI MB 1203–1204; NHMUK PE PEI 5475– 5476; NHMUK PE PEI 5500; NHMUK PE PEI 5503). Description. Shell is small, mytiliform, inequilateral, prosocline, higher than long, and moderately inflated. Umbo is small, terminal and prosogyrate. Posterior dorsal margin is straight. Posterior margin is slightly convex, forming a rounded posteroventral margin. Anterior margin is long, nearly straight or weakly acute and partly depressed near the umbo. Remarks. The internal characters of the shells cannot be observed because all the specimens are articulated. Externally, the shells resemble Promyalina schamarae from the Griesbachian Lazurnaya Bay Formation, Russia (Shigeta et al. 2009), and are ... : Published as part of Foster, William J., Danise, Silvia & Twitchett, Richard J., 2017, A silicified Early Triassic marine assemblage from Svalbard, pp. 851-877 in Journal of Systematic Palaeontology 15 (10) on pages 854-855, DOI: 10.1080/14772019.2016.1245680, http://zenodo.org/record/10883052 ...