Scientific name Trigonia Order Trigoniida | Superfamily Trigonioidea Subfamily Trigoniinae Rank Genus | |
Similar Bivalvia, Molluscs, Trigoniidae, Myophorella, Pholadomya | ||
Slow motion closeup of our australian native stingless bees trigonia carbonaria
Trigonia is an extinct genus of saltwater clams, fossil marine bivalve mollusk in the family Trigoniidae.
Contents
Description
The genus Trigonia is the most readily identifiable member of the familyTrigoniidae, having a series of strong ribs or costae along the anterior part of the shell exterior. They are the first representatives of the family to appear in the Middle Triassic (Anisian) of Chile and New Zealand. The first European examples (Trigonia costata Parkinson) turn up in the Lower Jurassic (Toarcian) of Sherborne, Dorset and Gundershofen, Switzerland.
References
Trigonia Wikipedia(Text) CC BY-SA