Aymberedactylus

Aymberedactylus Temporal range: Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Holotype mandible
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Pterosauria
Suborder:	†Pterodactyloidea
Family:	†Tapejaridae
Genus:	†Aymberedactylus Pêgas et al., 2016[1]
Species:	†A. cearensis
Binomial name
†Aymberedactylus cearensis Pêgas et al., 2016[1]

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 aymbere ("small lizard") and Greek daktylos ("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 270 millimetres (11 in) 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

The preserved specimen of Aymberedactylus would have had a wingspan of approximately 2 metres (6 ft 7 in), 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