Pachygonosaurus

Extinct genus of reptiles

Pachygonosaurus Temporal range: Ladinian, 242–237 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓

Vertebrae of Pachygonosaurus sp.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	†Ichthyosauria
Genus:	†Pachygonosaurus von Huene, 1916
Type species
†Pachygonosaurus robustus Maisch and Matzke, 1997

Pachygonosaurus (meaning "wide angled [vertebrae] lizard")^[1] is a genus of ichthyosaur from Upper Silesia, Poland (then part of the German Empire). It was described in 1916 by Friedrich von Huene and it has one single species, Pachygonosaurus robustus, based solely on the holotype, composed of two vertebral centra discovered in 1910, with a further three vertebrae also possibly belonging to the genus.^[2] Nowadays, Pachygonosaurus is considered a nomen dubium.^[3]

References

^ Maisch & Matzke 1997.
^ von Huene 1916, pp. 39–40.
^ Surmik & Brachaniec 2013, p. 93.

Cited bibliography

von Huene, Friedrich (1916). "Beiträge zur Kenntnis der Ichthyosaurier im deutschen Muschelkalk". Palaeontographica (in German). 62. Tübingen: 1–68.
Maisch, Michael W.; Matzke, Andreas T. (1997). "Observations on Triassic ichthyosaurs. Part I: Structure of the palate and mode of tooth implantation in Mixosaurus cornalianus (Bassini, 1886)". Neues Jahrbuch für Geologie und Paläontologie. 1997 (12). Stuttgart: 717–732. doi:10.1127/njgpm/1997/1997/717.
Surmik, Dawid; Brachaniec, Tomasz (2013). "The large superpredators' teeth from Middle Triassic of Poland". Contemporary Trends in Geoscience. 2 (1): 91–94. Bibcode:2013CTGeo...2...91S. doi:10.2478/ctg-2014-0013. S2CID 59462364.

Ichthyosauromorpha

Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Subclass: Diapsida
Clade: Neodiapsida

Sauropsida

see Sauropsida
Ichthyosauromorpha	see below↓

Ichthyosauromorpha

Baisesaurus

Hupehsuchia

Eohupehsuchus
Nanchangosaurus

Hupehsuchidae

Hupehsuchus
Parahupehsuchinae	Eretmorhipis Parahupehsuchus

Parvinatator Utatsusaurus
Grippiidae	Gulosaurus Grippia

Ichthyosauria

- see below↓

Ichthyosauria

Cymbospondylidae	Cymbospondylus Phantomosaurus? Thalattoarchon? Xinminosaurus?

Hueneosauria

Cymbospondylidae?

Auroroborealia? Californosaurus Callawayia Guizhouichthyosaurus? Mikadocephalus? Shonisaurus?
Toretocnemidae?	Qianichthyosaurus? Toretocnemus
Parvipelvia	see below↓

Nomina dubia	Barracudasaurus Pachygonosaurus Pessosaurus Sphaerodontes Svalbardosaurus Tibetosaurus

Parvipelvia

Hudsonelpidia
Macgowania

Neoichthyosauria

Temnodontosauroidea?

Temnodontosaurus
Leptonectidae?	Eurhinosaurus? Excalibosaurus? Leptonectes Wahlisaurus?

Thunnosauria

Ichthyosauridae	Ichthyosaurus Malawania? Protoichthyosaurus?

Baracromia

Chacaicosaurus?

Stenopterygiidae

Magnipterygius
Stenopterygius

Ophthalmosauria

Ophthalmosauridae

Arthropterygius? Gengasaurus? Jabalisaurus Janusaurus? Myobradypterygius Nannopterygius? Palvennia? Thalassodraco?
Ophthalmosaurinae	Acamptonectes Baptanodon Mollesaurus Ophthalmosaurus

Platypterygiidae

Acuetzpalin Aegirosaurus Arthropterygius? Athabascasaurus? Brachypterygius Catutosaurus Cryopterygius? Grendelius Janusaurus? Kazakhstanosaurus Keilhauia? Muiscasaurus Palvennia? Parrassaurus Pervushovisaurus Sumpalla Sveltonectes Undorosaurus
Platypterygiinae	Caypullisaurus Kyhytysuka Leninia Maiaspondylus Platypterygius Plutoniosaurus Simbirskiasaurus Sisteronia