CADIC 02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
artículos
Título:
BIVALVES ON THE MOVE: THE INTERPLAY OF EXTRINSIC AND INTRINSIC FACTORS ON THE MORPHOLOGY OF THE TRACE FOSSIL PROTOVIRGULARIA
Autor/es:
LÓPEZ CABRERA, MARIA I. ; OLIVERO, EDUARDO B.; BUATOIS, LUIS A.; MÁNGANO, M. GABRIELA; MAPLES, CHRISTOPHER G.
Revista:
PALAIOS
Editorial:
SEPM-SOC SEDIMENTARY GEOLOGY
Referencias:
Lugar: Lawrence; Año: 2019 vol. 34 p. 349 - 363
ISSN:
0883-1351
Resumen:
ABSTRACT: Tide-influenced deposits of the Pennsylvanian Rock Lake Shale Member, Stanton Formation, Missouriand Kansas (U.S.A.), contain well-preserved evidence of the burrowing activities of protobranch bivalves, includinglocomotion (Protovirgularia) and locomotion-resting (Protovirgularia-Lockeia) trace fossils. Protovirgularia shows threedistinct morphotypes, the morphological variability of which was controlled by external factors such as substrateconditions, toponomy, and undertrack deficiency. Extreme morphological modifications of Protovirgularia and/orLockeia, represented by irregular bilobate structures, probably result from erosion and subsequent partial passivefilling of the original biogenic structures. In addition, very well-preserved trace fossils showing intergradation of a fanshapedcluster of ridges with Protovirgularia-Lockeia structures are interpreted as a compound biogenic structure thatrepresents locomotion, resting, and feeding activities of burrowing protobranch bivalves.
