Data · collection · 2026
An enigmatic ammonite population from the late Callovian of Montreuil-Bellay (Maine-et-Loire, France)
Listed in GBIF
This dataset contains the digitized treatments in Plazi based on the original journal article Jattiot, Romain, Boursicot, Pierre-Yves (2026): An enigmatic ammonite population from the late Callovian of Montreuil-Bellay (Maine-et-Loire, France).
Description
Geodiversitas 48 (13): 273-285, DOI: 10.5252/geodiversitas2026v48a13 ABSTRACT An enigmatic ammonite (Ammonoida, Ammonitida) population represented by ten immature specimens from the late Callovian (Pseudopeltoceras leckenbyi Horizon) of Montreuil-Bellay is documented in this work.
No evident similarities can be found between the studied material and any previously described species overall, suggesting at first glance that this population represents a new taxon. However, a thorough literature review on ammonoid pathologies and a detailed investigation on the morphology and ornamentation of the specimens lead us to instead support the hypothesis that the studied population reflects abnormal specimens.
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More specifically, we suggest that the specimens described herein are genetically-induced abnormal (forma aegra circumdata) Taramelliceras taurimontanum Erni, 1934 specimens (or alternatively – although more unlikely – Granulochetoceras hungaricum Lóczy, 1915 specimens). In our opinion, additional material providing information on the adult morphology of this remarkable and extremely rare ammonite assemblage is required before completely ruling out the hypothesis that this population represents a new taxon.
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Where it is published
- GBIF dataset page gbif.org/dataset/6008900b-4eb9-42cb-80be-5355ba8d5820 ↗
landing page · from gbif
- DOI doi.org/10.15468/qv2fqm ↗
DOI / persistent id · from gbif
Documentation and papers
- Publisher page tb.plazi.org/GgServer/summary/FFAEFFF20C39FFCAFFBDFFA35F372928 ↗
documentation · from gbif
Catalogue records · 1
- GBIF API api.gbif.org/v1/dataset/6008900b-4eb9-42cb-80be-5355ba8d5820 ↗
metadata API · from gbif
Topics
- From keywords
- Life Sciences · Pathology
Provenance · 1 source records, 8 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| GBIF | 6008900b-4eb9-42cb-80be-5355ba8d5820 | 7 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · gbif | connector:gbif@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · gbif | connector:gbif@1.0.0 | |
| created_date | source · gbif | connector:gbif@1.0.0 | |
| description | source · gbif | connector:gbif@1.0.0 | /description |
| license | source · gbif | connector:gbif@1.0.0 | |
| publication_date | source · gbif | connector:gbif@1.0.0 | |
| title | source · gbif | connector:gbif@1.0.0 | /title |
| updated_date | source · gbif | connector:gbif@1.0.0 |