New genus and species of monophenestratan pterosaur named Propterodacillus frankellae It documents the transition from the older rhamphorhynchoid pterosaurs to pterodactyloids.

Propterodacillus frankellae It lived about 150 million years ago, during the Kimmeridgian stage of the Late Jurassic Period.

This flying reptile had a moderately long skull, about 9 centimetres (3.5 inches) long, and an estimated wingspan of about 55 centimetres (21.7 inches).

This species also had a very short tail and a small but functional fifth finger with two phalanges.

Propterodacillus frankellae a kind of Monophenestratan (Monofenestrata) is a large group of pterosaurs that includes the family Turconopteridae and the suborder Pterodactyloidea.

“As the earliest actively flying vertebrate lineage, pterosaurs were highly successful in evolution throughout the Mesozoic Era.” Dr. Frederick Spindler “The dinosaur museum's Altmühlthal writes in the new paper:

“For most of the long history of research, every specimen could be classified as belonging to one of two major types: the more ancestral long-tailed Rhamphorhynchioidea and the derived short-tailed Pterodactyloidea.”

“The rare anurognathids, the only short-faced pterosaurs, have similarly short tails but otherwise look like rhamphorhynchids and are therefore generally thought to have been deep-nesting rhamphorhynchids.”

“True intermediate, and therefore plausible transitional, forms between the major types were unknown until the discovery of the Curculionoptera.”

The fossil, named the Painten protterosaur, was discovered beneath the Rigol limestone quarry near Painten in Bavaria, Germany.

The specimen consists of a complete and fully articulated skeleton with soft tissue remaining in the radial fibrils of the torso and wings.

“Propterodacillus frankellae It is contemporary with the oldest Archaeopteryx “It came from a nearby basin,” the paleontologists wrote in their paper.

According to Dr Spindler, the discovery fills one of the largest knowledge gaps in the evolution of pterosaur morphology.

“Propterodacillus frankellae “It's a near-perfect mix of rhamphorhynchoid, curcunopteroid and derived pterodactyloid pterosaur features,” he said.

“Similarities with the derived Pterodactyloidea include the shape of the skull and the short tail.”

“For example, the ancestral traits shared with the Turconogopteridae family are Propterodactyl The most distinctive features of this pterosauroidea animal are its functional fifth toe and long caudal snout.”

“Intermediate conditions apply for neck extension, metacarpal extension, and shortening of the fifth toe.”

of paper Published online in the journal Palenitrogy Electronica.

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Frederick Spindler. 2024. Pterosaur articulation from the Late Jurassic of Germany. Palenitrogy Electronica 27(2):a35; doi:10.26879/1366