Protopteraspis
| Protopteraspis Temporal range:
| |
|---|---|
| |
| Reconstruction of P. gosseleti | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | |
| Subclass: | |
| Order: | |
| Family: | |
| Genus: | Protopteraspis
|
Protopteraspis is an extinct genus of pteraspidid heterostracan agnathan with fossils known from Lower Devonian marine strata in Western Europe. The animal's somewhat flat build has led some to believe that it was a bottom dweller, living in freshwater areas. It has been described as "somewhat unspecialized".[1] Its snout was round and narrow, shorter than that of its immediate relatives. Protopteraspis also did not possess the cornua (horns) found on the headshields of other pterapsids; rather, it had "small points" behind the gill opening.[1] It did possess a "medium-sized" dorsal spine.[1] Plates covering the headshield had ridges of dentine. It is theorized that the headshield formed in youth and that it grew via growth of the plates, which fused in adulthood. The scales of the animal were "small and diamond shaped".[1]
References
- ^ a b c d e Palmer, Douglas; et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (first American ed.). New York City: DK Publishing. p. 130. ISBN 9780756655730.
 | This article about Pteraspidomorphi is a stub. You can help Wikipedia by expanding it. |
 | This article related to a Devonian jawless fish is a stub. You can help Wikipedia by expanding it. |