Piscivorenantiornis

Piscivorenantiornis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Avialae
Clade:	†Enantiornithes
Genus:	†Piscivorenantiornis Wang, Zhou & Sullivan, 2016
Type species
Piscivorenantiornis inusitatus Wang, Zhou & Sullivan, 2016

Piscivorenantiornis is a genus of enantiornithine bird from the Jiufotang Formation of Liaoning, China. It is known from a single species, P. insusitatus.^[1]

History of discovery

The holotype of Piscivorenantiornis (IVPP V22582), was discovered near Dapingfang in Chaoyang County, Liaoning, China, in sediments identified as belonging to the Jiufotang Formation.^[1]^[2] Piscivoreantiornis' genus name is derived from the Latin pisci ("fish") and vor ("to eat"), denoting it as the first known piscivorous enantiornithine; the species name derives from the Latin inusitatus ("extraordinary").^[1] A second specimen of P. inusitatus (IVPP V23362) was described in 2020.^[3]

Description

Piscivorenantiornis was a small enantiornithine.^[1] The sternum resembles bohaiornithids in some regards, though its lateral trabecula lacks the strong lateral deflection that characterises them. It preserves a pair of craniolateral processes absent in most other enantiornithines. The articular sulci of the coracoid are widely spaced. The pubic boot is large and its tip is strongly recurved.^[1]^[4]

Taxonomy

In the paper describing Piscivorenantiornis, it nested either alongside Pterygornis, or outside of a clade comprising Pterygornis and Dunhuangia.^[1] In a paper published four years later, it was recovered in outside of a clade comprising Mirusavis and Shangyang.^[3]

Paleobiology

The holotype of Piscivorenantiornis was found alongside a spindle-shaped arrangement of fish bones, likely belonging to the genus Lycoptera. Due to its shape and proximity, and a lack of fish bones elsewhere on the slab, it is believed that this structure represents a gastric pellet that was regurgitated shortly prior to its death.^[2]

References

^ ^a ^b ^c ^d ^e ^f Wang, Min; Zhou, Zhonghe (2017-03-04). "A morphological study of the first known piscivorous enantiornithine bird from the Early Cretaceous of China". Journal of Vertebrate Paleontology. 37 (2): e1278702. Bibcode:2017JVPal..37E8702W. doi:10.1080/02724634.2017.1278702. ISSN 0272-4634.
^ ^a ^b Wang, Min; Zhou, Zhonghe; Sullivan, Corwin (2016). "A fish-eating enantiornithine bird from the Early Cretaceous of China provides evidence of modern avian digestive features". Current Biology. 26 (9): 1170–1176. Bibcode:2016CBio...26.1170W. doi:10.1016/j.cub.2016.02.055. PMID 27133872.
^ ^a ^b Wang, Min; Zhou, Zhonghe (2020-05-03). "Anatomy of a New Specimen of Piscivorenantiornis Inusitatus (Aves: Enantiornithes) from the Lower Cretaceous Jehol Biota". Journal of Vertebrate Paleontology. 40 (3). doi:10.1080/02724634.2020.1783278. ISSN 0272-4634.
^ Wang, Min; Zhou, Zhonghe (2020-05-03). "Anatomy of a New Specimen of Piscivorenantiornis Inusitatus (Aves: Enantiornithes) from the Lower Cretaceous Jehol Biota". Journal of Vertebrate Paleontology. 40 (3). doi:10.1080/02724634.2020.1783278. ISSN 0272-4634.

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