''Trigonulina'' is a genus of small

carnivorous A carnivore , or meat-eater (Latin, ''caro'', genitive ''carnis'', meaning meat or "flesh" and ''vorare'' meaning "to devour"), is an animal or plant whose food and energy requirements derive from animal tissues (mainly muscle, fat and other sof ...

bivalves Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

in the family Verticordiidae. Species in the genus are known for the unique round formations on the surface of their shells.

Species

* ''

Trigonulina novemcostata ''Trigonulina novemcostata'' is a carnivorous bivalve in the family Verticordiidae. It is native to the South China Sea with 7–8 prominent ribs on its surface and ranges from about 0.7-5 millimeters in size in accordance with the unaccepted gen ...

'' ( A. Adams & Reeve, 1850) * ''

Trigonulina ornata ''Trigonulina ornata'', commonly known as the "'Ornate verticord", is a carnivorous bivalve in the family Verticordiidae. It is native to coastal The coast, also known as the coastline or seashore, is defined as the area where land meets th ...

'' ( d'Orbigny, 1853)

References

Bivalve genera Verticordiidae Taxa described in 1853 Taxa named by Alcide d'Orbigny {{Bivalve-stub