Abstract
The process of interpreting and evaluating a fossil is a difficult task. Isopoda is a species-rich group of peracarid eumalacostracans which represent quite a challenge when found as fossils, independent of whether we are working with fragmentary or more complete specimens. Here we describe a new fossil species of crustacean, Platuropodus odysseus n. gen. n. sp., from the Irati Formation, Permian of Parana Basin, Brazil. After misinterpretations, the fossil taxon is recognised here as a representative of Isopoda. The new species presents characters found in Phreatoicidea, Asellota and Oniscidea in a unique combination for the fossil and extant record, such as two pairs of sub-chelate anterior trunk appendages, a short region after the anus and flat uropods. This chimera-like morphology and a morphometric analysis of the sub-chelae indicate convergent evolution in the early diversification of Isopoda. The morphological diversification present in the Palaeozoic and Mesozoic fossil record of Eumalacostraca indicate a push of the past effect in different ingroups of Peracarida.
| Item Type: | Journal article |
|---|---|
| Faculties: | Biology |
| Subjects: | 500 Science > 570 Life sciences; biology |
| ISSN: | 0035-6883 |
| Language: | English |
| Item ID: | 101058 |
| Date Deposited: | 05. Jun 2023, 15:36 |
| Last Modified: | 17. Oct 2023, 15:06 |
Actions (login required)
- View Item
