Scheenstia

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Scheenstia
Temporal range: Late JurassicEarly Cretaceous, 150–125 Ma
2013-03 Naturkundemuseum Berlin Dickschupperfisch Lepidotes maximus anagoria.JPG
Fossil specimen of S. maximus
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Semionotiformes
Family: Semionotidae
Genus: Scheenstia
López-Arbarello & Sferco, 2011
Type species
Scheenstia zappi
López-Arbarello & Sferco, 2011
Species[1]

S. mantelli (Agassiz, 1833)
S. laevis (Agassiz, 1837)
S. maximus (Wagner, 1863)
S. decoratus (Wagner, 1863)
S. degenhardti (Branco, 1885)
S. hauchecornei (Wagner, 1863)
S. zappi López-Arbarello & Sferco, 2011

Scheenstia is an extinct genus of neopterygian ray-finned fish from the Cretaceous period. Fossils have been found in Bavaria, France, and England.

Life restoration of S. maximus

Scheenstia is frequently pictured as the prey of the large dinosaur Baryonyx walkeri because the scales and teeth of these fish were found in the stomach region of a fossil B. walkeri specimen. The fish remains were previously referred to the related genus Lepidotes, but all Cretaceous species of that genus have since been re-classified as Scheenstia following detailed phylogenetic analysis.[1]

Classification[edit]

Scheenstia is a genus of lepisosteiform that is related to the genus Lepidotes. The latter has been one of the greatest actinopterygian wastebasket taxa, with one 2012 study finding species referrable to a minimum of three different and distantly related genera. Scheenstia is also related to Isanichthys. A cladogram showing the relations of Neopterygii was published in the review, and a simplified version labelling the previous species of Lepidotes is shown here.[1]

Ginglymodi
Semionotiformes

Sangiorgioichthys

Macrosemiidae

Luoxioingchthys

Notagogus

Macrosemius

Protopterus

Semionotidae

Semionotus

Callipurbeckiidae

Semiolepsis

Paralepidotus

Macrosemimimus

Tlayuamichin

Callipurbeckia (incl. L. minor, L. notopterus, L. tendagurensis)

Lepisoteiformes

Neosemionotus

Scheenstia (incl. L. mantelli, L. laevis, L. maximus, L. decoratus, L. degenhardti, L. hauchecorni)

Lepidotes

Isanichthys

Lepisosteoidei

References[edit]

  1. ^ a b c López-Arbarello, A. (2012). "Phylogenetic Interrelationships of Ginglymodian Fishes (Actinopterygii: Neopterygii)". PLoS ONE. 7 (7): e39370. doi:10.1371/journal.pone.0039370. PMC 3394768. PMID 22808031.