Jurassic ammonoid with exceptional preservation of the aptychi in the body chamber
An exceptional specimen of Rehmannia (Loczyceras) is described in this work. Its body chamber includes two paired aptychi that according to its morphological characteristics correspond to Praetriaptychus (typical of Perisphinctidae). The ammonoid comes from the municipality of Quintanas de Hormiguer...
| Authors: | , , |
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| Format: | article |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/126259 |
| Online Access: | https://hdl.handle.net/20.500.14352/126259 |
| Access Level: | Open access |
| Keyword: | 564.53(460) 56:594.53(460) Ammonoids Anatomical function Anatomical support structure Aptychi Scientific dissemination Paleontología 2416.02 Paleontología de Los Invertebrados |
| Summary: | An exceptional specimen of Rehmannia (Loczyceras) is described in this work. Its body chamber includes two paired aptychi that according to its morphological characteristics correspond to Praetriaptychus (typical of Perisphinctidae). The ammonoid comes from the municipality of Quintanas de Hormiguera (Palencia, Spain), and although its precise stratigraphic position is unknown, considering the taxonomic identification it is most likely that it corresponds to Callovian materials. The presence of aptychi inside the body chamber in approximately original anatomical position with this type of taphonomic conservation is rare in the fossil record. On the other hand, the type of function that these anatomical pieces had is a highly discussed topic in the literature that arouses significant interest. From educational or dissemination approaches, it can also be considered a highly interesting example since it allows to communicate the anatomical characteristics of these extinct organisms to society. These types of palaeontological elements and their great value in actions related to Geodiversity can be utilized as formal or non-formal ex situ educational tools. |
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