1972/07/21 by John Pojeta, Bruce Runnegar, Noel J. Morris +1 · 3 citations
Earth and Planetary Sciences · Environmental Science · #Marine Biology and Ecology Research #Paleontology and Stratigraphy of Fossils #Isotope Analysis in Ecology
paper · doi:10.1126/science.177.4045.264
openalex publication_date 1972/07/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
Four Paleozoic bivalved genera are assigned to the new molluscan class Rostroconchia: Eopteria, Euchasma, Conocardium, and Pseudoconocardium. These mollusks have ani uncoiled univalved larval shell; an untorted bivalved adult shell; no hinge teeth, ligament, or adductor muscles; and a fused, almost inflexible. hinge. Rostroconchianis developed separately from the pelecypods through the ribeirioids, but are regarded as more closely related to the Pelecypoda and Scaphopoda than to other known classes of mollusks.