Thyasira undefined-1
Creators
- 1. Swedish Museum of Natural History, Department of Palaeobiology, Box 50007, 10405 Stockholm, Sweden.
- 2. Museo Civico di Scienze Naturali, 51, Via Medaglie D'Oro 51, 48018 Faenza, Italy.
- 3. Institute of Marine Sciences, Italian National Research Council, Via Gobetti 101, 40129 Bologna, Italy; and Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy.
Description
Thyasira sp. 1
Fig. 9A–B
Material examinedITALY – Emilia-Romagna • 1 spec.; Castiglione dei Pepoli; MGGC 22311 (H = 12 mm).
DescriptionSmall, 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
RemarksThe 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 rangeLower to Middle Miocene (Aquitanian to Langhian), northern Italy.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- MGGC
- Family
- Thyasiridae
- Genus
- Thyasira
- Kingdom
- Animalia
- Material sample ID
- MGGC 22311
- Order
- Lucinida
- Phylum
- Mollusca
- Species
- undefined-1
- Taxon rank
- species