The presence of the bivalve mollusks Astarte ( Tridonta ) borealis Schumacher and A. ( T. ) hopkinsi new species, in uppermost Miocene or lower Pliocene strata of the Milky River Formation on the Alaska Peninsula, southwestern Alaska, signals the earliest

Coelastarte fuersichi (Bivalvia; Astartidae) is here described as a new, endemic species from the Early Jurassic (Pliensbachian) of northern Chile. Taphonomic evidence suggests that C. fuersichi was a shallow infaunal burrower with the posterior end directed

The identity of the subgenera Isocrassina Chavan, 1950, Laevastarte Hinsch, 1952, and Ashtarotha Dall, 1903, of the genus Astarte Sowerby, 1816 in the family Astartidae (Mollusca, Bivalvia) is discussed. Isocrassina has been widely used for Pliocene species