Unionites subrectus ...

• Main Authors: Foster, William J., Danise, Silvia, Twitchett, Richard J.
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Trigoniida; Trigonodidae; Unionites; Unionites subrectus; Silvia; Svalbard
• Online Access: https://dx.doi.org/10.5281/zenodo.10903525; https://zenodo.org/doi/10.5281/zenodo.10903525

Unionites aff. subrectus (Bittner, 1901) (Fig. 8) aff. 1901 Anodontophora subrecta Bittner: 100, pl. 7, figs 28–30. aff. 2003 Unionites subrectus (Bittner); Szente & Vor̈os: 131, pl. Biv-II, figs 25, 26. 2009 Triaphorus aff. multiformis Kiparisova; Kumagae & Nakazawa: 171, fig. 145, 18–25. Material. Seven specimens from LD-04 (NHMUK PI MB 1245–1247; NHMUK PE PEI 5480; NHMUK PE PEI 5485; NHMUK PE PEI 5507; NHMUK PE PEI 5519), and nine specimens from LD-05 (NHMUK PI MB 1195; NHMUK PI MB 1197; NHMUK PI MB 1201; NHMUK PE PEI 5495; NHMUK PE PEI 5506; NHMUK PE PEI 5508; NHMUK PE PEI 5516). Description. Outline elongate-elliptical. Shell equivalved, inflated below the umbo, and inequilateral with beak positioned approximately 85% along the length of the dorsal margin from the posterior. Lower part of anterior dorsal margin projects slightly beyond plane of commissure. Posterodorsal margin is almost straight to slightly round and gently sloping. Lunule is long and narrow, with deeply impressed escutcheon. ... : 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 862-863, DOI: 10.1080/14772019.2016.1245680, http://zenodo.org/record/10883052 ...