2026-08-16T14:13:48Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/723632023-08-27T05:24:45Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Martínez Gutiérrez, Gemma author Ureta Gil, María Soledad author García Frank, Alejandra 2023-06-22T11:22:38Z 2023-06-22T11:22:38Z 2023-04-25 0891-2963, ESSN: 1029-2381 10.1080/08912963.2023.2199755 https://hdl.handle.net/20.500.14352/72363 https://doi.org/10.1080/08912963.2023.2199755 The genus Bouleiceras (Ammonitina, Bouleiceratinae) appears in the Iberian Range from the Tenuicostatum Zone to the Serpentinum Zone (Lower Toarcian, Jurassic). It displays a lower frequency in number of specimens (approximately 1%) in relation to other groups of ammonoids at the same levels within the studied sections. The studied species of this genus are B. nitescens Thévenin, B. elegans Arkell, B. arabicum Arkell, B. tumidum Arkell, B. marraticum Arkell, B. ibericum Martínez and B.? betetensis Martinez. They correspond to incomplete internal moulds and the record includes a scarce number of specimens per species. By identifying different types of taphonomic alterations within the specimens (biostratinomic and fossildiagenetic) it was possible to recognise the removal processes (resedimentation or reelaboration). Most of the specimens present different mechanisms of taphonomic alteration that denote prolonged processes of necroplanktonic drift and resedimentation or reelaboration such as colonisation, facet abrasion, distortion, disarticulation in internal moulds, etc. Despite the scarcity of material they can be classified as taphonic populations of type 3. Taphorecords point to a shallow marine environment with low sedimentation rates and episodic high-energy events. None of the data seems to correspond to areas linked to favourable environments for the ontogenic development of these species. eng Taphonomic alteration processes in Bouleiceras (Jurassic Ammonitina) of the Iberian Range. Paleoenvironmental and paleobiogeographical implications journal article URL https://docta.ucm.es/bitstreams/f3f816cd-1c15-4a92-942e-b888e4d6d636/download File MD5 6a4568ebef1c192abf1bf465ee6f93dc 10019517 application/pdf Taphonomic alteration processes in Bouleiceras Jurassic Ammonitina of the Iberian Range Paleoenvironmental and paleobiogeographical implications.pdf URL https://docta.ucm.es/bitstreams/a85e22fa-a592-43a4-ac40-f8994194fdc7/download File MD5 a61c2e1ceb0c6f661084187cec5d33c9 36763 text/plain Taphonomic alteration processes in Bouleiceras Jurassic Ammonitina of the Iberian Range Paleoenvironmental and paleobiogeographical implications.pdf.txt