Amaltheidae e Hildoceratidae (Ammonitina) del Pliensbachiense Superior (Cronozona Spinatum) en las cuencas septentrionales de la Península Ibérica

  1. M.J. Comas-Rengifo
  2. L.V. Duarte
  3. F. Felix
  4. A. Goy
  5. R. Paredes
  6. R. Silva
Book:
Actas de las XXXII Jornadas de la Sociedad Española de Paleontología
  1. Meléndez Hevia, Guillermo (dir.)
  2. Núñez, Alizia (dir.)
  3. Tomás, Marta (dir.)

Publisher: Instituto Geológico y Minero de España

ISBN: 978-84-9138-016-0

Year of publication: 2016

Pages: 47-52

Congress: Sociedad Española de Paleontología. Jornadas (32. 2016. null)

Type: Conference paper

Abstract

In the northern Iberian Peninsula, the Spinatum Chronozone begins with the first record of the genus Pleuroceras, just above the last levels of the Margaritatus Chronozone (Gibbosus Subchronozone), the index fossils being: P cf. salebrosum and P. transiens in the sections of Rodiles and Camino, in the Iberian Range (Almonacid de la Cuba), the species P. transiens marks the boundary and in the section of Peniche (Portugal) the key species is P. solare. The Apyrenum Subchronozone is marked by the common occurrence of Am. margaritatus, P. solare, P. spinatum associated to P. apyrenum, the representatives of Hildoceratidae being markedly scarce, with the exception of the Lusitanian Basin. The Hawskerense Subchronozone begins with the first record of P. hawskerense, in association with the last records of P. solare and P. yeovilense; and to P. spinatum. Above these levels, the representatives of family Amaltheidae are replaced by the subfamilies Arieticeratinae and Harpoceratinae. Before the first record of D. (Eodactylites) simplex which should mark the base of the Toarcian stage, no specimens of Pleuroceras are found, the genera Canavaria and Tauromeniceras, being in turn dominant.