Detailed Pedia

Simurghia

Simurghia
Temporal range: Late Cretaceous, 66 Ma
Journal.pbio.2001663.g010.png
Holotype humerus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Order: Pterosauria
Suborder: Pterodactyloidea
Clade: Pteranodontia
Family: Nyctosauridae
Genus: Simurghia
Longrich, Martill, & Andres, 2018
Type species
Simurghia robusta
Longrich, Martill, & Andres, 2018

Simurghia is a genus nyctosaurid pterosaur from the Ouled Abdoun Basin of Morocco, a basin that dates to the Maastrichtian stage of the Late Cretaceous period, about 66 million years ago. It was published in 2018 by paleontologists Nicholas R. Longrich, David M. Martill, and Brian Andres, along with two other nyctosaurids from the same basin: Alcione and Barbaridactylus.[1] The type and only species is S. robusta.

Discovery and naming

All known specimens of Simurghia were uncovered in a 3-year dig that unearthed about 200 pterosaur specimens. The type specimen, FSAC-OB 7, consists of a nearly complete humerus, lacking only the humeral head and the ulnar crest.[1]

Simurghia is named after a flying beast from Persian mythology known as the Simurgh. The species name, S. robusta, is a Latin word that means "robust."[1]

Classification

Below is a cladogram showing the results of a phylogenetic analysis first presented by Andres and colleagues in 2014, and updated with additional data by Longrich and colleagues in 2018. In this analysis, they found Simurghia to be the sister taxon of the species Alcione elainus, both placed within the family Nyctosauridae.[2][1]

 Pteranodontia 
Pteranodontidae

Pteranodon sternbergi

Pteranodon longiceps

Tethydraco regalis

Nyctosauridae

Alamodactylus byrdi

Volgadraco bogolubovi

Cretornis hlavaci

Alcione elainus

Simurghia robusta

Muzquizopteryx coahuilensis

Barbaridactylus grandis

Nyctosaurus lamegoi

Nyctosaurus nanus

Nyctosaurus gracilis

Paleobiology

Simurghia is similar in form to Alcione, but is unlikely to represent an adult of this species. All specimens of Alcione are either subadults or adults, based on their bone's dense avascular surface texture, well ossified condyles, and fused synsacrum and scapulocoracoid. Additionally, lack of intermediately sized humeri would suggest that these pterosaurs are distinct from each other. Using isometric scaling, Simurghia would weigh 560% more than Alcione, making sexual dimorphism or intraspecific variation unlikely.[1]

Paleoecology

Locality and stratigraphy of the discovery site of Simurghia.

Simurghia was discovered in upper Maastrichtian phosphates located in the Ouled Abdoun Basin of Northern Morocco. This geological formation does not belong to a formation. It is divided into couches, with Simurghia being discovered in Couche III. This layer dates back to the latest Maastrichtian, about 1 million years before the extinction event at the end of the Cretaceous. Couche III represents the most diverse marine ecosystem known from the time.[1]

A large variety of marine life is known from the region, including sharks and bony fish, in addition to turtles, plesiosaurs and mosasaurs. A few rare, fragmentary dinosaur fossils are known, including an abelisaur and a sauropod. Other pterosaurs in the formation were originally only represented by the azhdarchid Phosphatodraco mauritanicus. However, in addition to Simurghia, more recent studies have revealed at least five more pterosaur species from this location, including Barbaridactylus, Alcione and Tethydraco.[1]

References

  1. ^ a b c d e f g Longrich, Nicholas R.; Martill, David M.; Andres, Brian; Penny, David (2018). "Late Maastrichtian pterosaurs from North Africa and mass extinction of Pterosauria at the Cretaceous-Paleogene boundary". PLOS Biology. 16 (3): e2001663. doi:10.1371/journal.pbio.2001663. PMC 5849296. PMID 29534059.
  2. ^ Andres, B.; Clark, J.; Xu, X. (2014). "The Earliest Pterodactyloid and the Origin of the Group". Current Biology. 24 (9): 1011–6. doi:10.1016/j.cub.2014.03.030. PMID 24768054.

This page was last updated at 2021-07-13 08:23 UTC. Update now. View original page.

All our content comes from Wikipedia and under the Creative Commons Attribution-ShareAlike License.

Contact

Top