Topic
Igdabatis
About: Igdabatis is a research topic. Over the lifetime, 2 publications have been published within this topic receiving 37 citations.
Papers
TL;DR: In this article, a bulk sampling of upper Campanian to lower-middle Maastrichtian coastal and lagoonal deposits in five sections of the Tremp Formation in the south-central Pyrenees has yielded numerous neoselachian teeth.
Abstract: Bulk sampling of upper Campanian to lower–
middle Maastrichtian coastal and lagoonal deposits in five
sections of the Tremp Formation in the south-central Pyrenees
yielded numerous neoselachian teeth. The fauna comprises
nine taxa of which three species and one genus are new:
Hemiscyllium sp., Lamniformes indet., Paratrygonorrhina
amblysoda gen. et sp. nov., Coupatezia trempina sp. nov.,
Coupatezia sp., Coupatezia? sp., Rhombodus ibericus sp. nov.
and Igdabatis indicus. The neoselachian fauna is dominated
by small nectobenthic rays. This composition resembles
assemblages known from the marine Upper Cretaceous, but
differs from nearby localities of the Basque-Cantabrian region
and continental selachian associations of the French Pyrenees.
The results indicate that Rhombodus might not be a reliable
biostratigraphic marker for the Maastrichtian. The faunal
composition suggests a shallow trans-Tethyan connection
between Eurasia and India at the end of the Cretaceous Period.
38 citations
TL;DR: Results and fossil evidence allow the proposal of a dispersal route between European and Gondwanan landmasses for these stingrays and suggest a highly nested position within Myliobatidae for the genus Igdabatis.
Abstract: Microvertebrate fossil assemblages (chondrichthyans, osteichthyans, lissamphibians and squamates) from the Campanian and Maastrichtian of south-western Europe include taxa with very different palaeobiogeographical affinities. However, most of these biogeographical histories remain unclear. As inhabitants of shallow marine waters, batoids are considered good palaeobiogeographical indicators that could reveal connections between continental platforms. Igdabatis is a stingray (Myliobatiformes) with an abundant Gondwanan fossil record, whereas its occurrence in the Ibero-Armorican landmass is intriguing. In this paper, a new species of Igdabatis – Igdabatis marmii sp. nov. – is reported from the lower Maastrichtian of Spain. Based on this new record, the phylogenetic relationships of Myliobatiformes are assessed, including Igdabatis taxa for first time. In addition, three new morphological characters are proposed based on the diagnoses of the different species and added to the dataset. The palaeobiogeographic...
13 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2007 | 1 |