2026-06-27T22:45:47Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/77132023-08-27T02:06:34Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Martínez Gutiérrez, Gemma author García Joral, Fernando author 2020-08-05 Bouleiceras is a very rare genus among the rich assemblages of ammonoids from the lower Toarcian of the Iberian Range. So far, only two dozen specimens have been recorded in numerous field campaigns carried out since 1965 by different authors. The interest of this taxon lies in its peculiar paleogeographical distribution in comparison with most other ammonoids of the same age. A review of these specimens is carried out, including those obtained in previous works and others recently collected in selected localities. Based mainly on the differences in the shape of the ventral section and the suture line, seven species have been identified; two of which are new: Bouleiceras ibericum nov. sp. and Bouleiceras? betetensis nov. sp. All the reviewed specimens are recorded in the Semicelatum Subzone of the Tenuicostatum Zone and the Elegantulum Subzone of the Serpentinum Zone from the Central Sector and the Levantine Sector of the Iberian Range. The global distribution of the genus is summarized from the known data, and its possible dispersal routes are analyzed, as well as the factors that could have conditioned them. 0016-6995 10.1016/j.geobios.2020.07.001 https://hdl.handle.net/20.500.14352/7713 https://doi.org/10.1016/j.geobios.2020.07.001 Bouleiceras (Hildoceratidae, Ammonitina) from the lower Toarcian (Jurassic) of the Iberian Range (Spain): Taxonomy, stratigraphic distribution and insights on its dispersal