Opis trigonalis (Sowerby)

Scale bar = 5cm

Description

Middle Jurassic, Inferior Oolite
Dundry or Dinnington
Somerset
England
M1557
Description:

Bivalves (marine molluscs) beloging to the geus Opis. That at the top right is an internal cast of the shell. It is possible that wo different species are shown in this image (also in this image M1559)
Moore, C.

Classification

Mollusca
Loboconcha
Bivalvia
Heterodonta
Veneroida
Astartidae
Trigonastarte
trigonalis