Английская Википедия:Aymberedactylus
Шаблон:Short description Шаблон:Speciesbox
Aymberedactylus (meaning "small lizard finger") is a genus of tapejarid pterosaur from the Early Cretaceous Crato Formation of Brazil.[1] It contains a single species, A. cearensis.
Discovery and naming
The holotype specimen of Aymberedactylus, MN 7596-V, is a nearly complete mandible preserved in three dimensions. It was discovered in the Aptian-Albian Crato Formation, a konservat-lagerstätte well known for its exquisite preservation of fossils,[2] and it was described in 2016.[1]
The name Aymberedactylus is derived from the Tupi word Шаблон:Lang ("small lizard") and Greek Шаблон:Transl ("finger"), and the specific name refers to the Brazilian state of Ceará, which it was discovered in.[1]
Description
Aymberedactylus can be identified as a tapejarine tapejarid from the holotypic jawbone due to its toothlessness, slightly downturned dentary symphysis which accounts for half of the total length of the jaw, and a small crest on the bottom of the dentary (which was incompletely preserved). Small neurovascular foramina on the symphysis indicates the likely presence of a horned sheath over the tip of the jaw, which is also seen in Tupandactylus. The preserved portion is Шаблон:Convert long.[1]
It can be distinguished from other pterosaurs by a long retroarticular process (a process to which the depressor mandibulae muscle attaches, implying that Aymberedactylus had good control over the movement of its jaw bones) and a small fossa, or depression, with a roughened bone texture on the splenial bone. In addition, Aymberedactylus shows a unique combination of traits: the shelf on the dentary symphysis is deep, the dorsal rim of the symphysis is concave, the jaw is relatively wide, the dentary fossa is short and shallow (which indicates a relatively weak bite), and the mandibular rami form a very large angle with the symphysis. These traits are a unique combination of basal and derived characteristics within Tapejaridae.[1]
The preserved specimen of Aymberedactylus would have had a wingspan of approximately Шаблон:Convert, typical of tapejarids. Judging by how the bones in its skull were not yet entirely fused, it was likely a subadult.[1]
Phylogeny
A phylogenetic analysis conducted in 2016 recovered Aymberedactylus as the most basal tapejarine.[1]
References
Шаблон:Reflist Шаблон:Pterosauria Шаблон:Taxonbar Шаблон:Portal bar
- Английская Википедия
- Страницы с неработающими файловыми ссылками
- Tapejaromorphs
- Albian life
- Early Cretaceous pterosaurs of South America
- Cretaceous Brazil
- Fossils of Brazil
- Crato Formation
- Fossil taxa described in 2016
- Taxa named by Alexander Kellner
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
