Thyasira undefined-1 ...

• Main Authors: Kiel, Steffen, Sami, Marco, Taviani, Marco
• Format: Text
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Bivalvia; Lucinida; Thyasiridae; Thyasira; Thyasira undefined-1; sami
• Online Access: https://dx.doi.org/10.5281/zenodo.10380308; https://zenodo.org/doi/10.5281/zenodo.10380308

Thyasira sp. 1 Fig. 9A–B Material examined ITALY – Emilia-Romagna • 1 spec.; Castiglione dei Pepoli; MGGC 22311 (H = 12 mm). Description Small, well-inflated, smooth, rounded-pentagonal shell, about as long as high, umbones elevated, blunt, slightly prosogyrate; posterior sulcus close to posterodorsal margin, deep, bordered distinct, roundtopped ridge; submarginal sulcus narrow; anterodorsal margin slightly concave Remarks The two species of Thyasira reported here are all small, poorly preserved, and represented by a single specimen each, making a robust identification difficult. They are placed in Thyasira due to their overall shape and size, and the presence of a shallow posterior sinus. Furthermore, Thyasira sp. 1 appears to have a submarginal sulcus. The two specimens differ in inflation and outline: Thyasira sp. 1 from Castiglione dei Pepoli is more globular than Thyasira sp. 2 from Casola; the latter is taller (it has a longer anterior margin) than Thyasira sp. 1. Stratigraphic and geographic range ... : Published as part of Kiel, Steffen, Sami, Marco & Taviani, Marco, 2023, Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions, pp. 115-160 in European Journal of Taxonomy 910 on pages 140-141, DOI: 10.5852/ejt.2023.910.2365, http://zenodo.org/record/10350702 ...