Pessopteryx

Pessopteryx is an extinct genus of ichthyosaur from the Early Triassic (Olenekian) of Svalbard, Norway.^[1] The genus originally contained four species, P. nisseri, P. arctica, P. pinguis, and P. minor, which were named in 1910 by Carl Wiman.^[2][3] Only P. nisseri is still considered valid; P. arctica and P. pinguis are considered nomina dubia while P. minor was reassigned to the tenuous genus Isfjordosaurus.^[3] Omphalosaurus nisseri, Merriamosaurus hulkei, and Rotundopteryx hulkei are all junior synonyms of P. nisseri.^[1]

Pessopteryx Temporal range: Early Triassic, Olenekian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	†Ichthyosauria
Family:	†Merriamosauridae
Genus:	†Pessopteryx Wiman, 1910
Species
†P. nisseri Wiman, 1910 (type)
Synonyms
Merriamosaurus hulkei Maisch & Matzke, 2002 Omphalosaurus niesseri (Wiman, 1910) Rotundopteryx hulkei Maisch & Matzke, 2000 non Duckhouse, 1999

References

1. Maisch, M. W. (2010). "Phylogeny, systematics, and origin of the Ichthyosauria – the state of the art" (PDF). Palaeodiversity. 3: 151–214.
2. Wiman, C. (1910). "Ichthyosaurier aus der Trias Spitzbergens" [Ichthyosaurs from the Triassic of Spitzbergen] (PDF). Bulletin of the Geological Institution of the University of Upsala (in German). 10: 125–148.
3. Maxwell, E. E.; Kear, B. P. (2013). "Triassic ichthyopterygian assemblages of the Svalbard archipelago: A reassessment of taxonomy and distribution". GFF. 135 (1): 85–94. doi:10.1080/11035897.2012.759145.