Fig. 3 in New Species Of The Lower Cretaceous Genus Matheronia Munier-Chalmas (Bivalve Hippuritida) In Romania

Fig. 3. Illustration of classical Matheronia species from the Barremian type locality of Orgon (SE France). Matheronia munieri Paquier. a. posterior view of a bivalve specimen showing the LV lamellar habit and flat RV (sample DG 110). b. internal view showing the myocardinal apparatus of the RV (sample DG 113); c. same specimen showing the uncoiled RV. d. Matheronia aptiensis Matheron, transverse antero-posterior section showing the myophores (Urgonia Museum collections). Specimens a to c, reference DG (Urgonia Museum), have been cleaned and prepared by Dominique Gesbert. Scale bar 10 mm.