# Eumetabolodon

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Extinct genus of reptiles

Eumetabolodon Temporal range: Early-?Middle Triassic, 251–244 Ma PreꞒ Ꞓ O S D C P T J K Pg N Cast of holotype, Paleozoological Museum of China Scientific classification Kingdom: Animalia Phylum: Chordata Class: Reptilia Family: †Procolophonidae Subfamily: †Procolophoninae Genus: †Eumetabolodon Li, 1983 Species †E. bathycephalus Li, 1983 (type)

***Eumetabolodon*** is an [extinct](/source/Extinct) [genus](/source/Genus) of [procolophonine](/source/Procolophonine) [procolophonid](/source/Procolophonid) [parareptile](/source/Parareptile) from early and middle [Triassic](/source/Triassic) ([Induan](/source/Induan) to earliest [Anisian](/source/Anisian) stages) deposits of [Nei Mongol](/source/Nei_Mongol), northern [China](/source/China). Two species of *Eumetabolodon* were named by J. L. Li in [1983](/source/1983_in_paleontology) and the [type species](/source/Type_species) is *Eumetabolodon bathycephalus*.[1]

## Discovery

The type species is known from the [holotype](/source/Holotype) [IVPP](/source/IVPP) V6064, a nearly complete [skull](/source/Skull) which was collected in the Zhuengeerqi locality, from the upper [Heshanggou Formation](https://en.wikipedia.org/w/index.php?title=Heshanggou_Formation&action=edit&redlink=1) ([Olenekian](/source/Olenekian) and earliest [Anisian](/source/Anisian) stages), [Ordos Basin](/source/Ordos_Basin). A second specimen, IVPP V6070 was collected in the Zhuengeerqi locality, from the [Ermaying Formation](/source/Ermaying_Formation) (upper Olenekian stage), Ordos Basin. Additional 17 specimens, IVPP V6065-69, V6166 (1&2), V6167, V6168 (1&2), V6169-75, were collected in the Gucheng locality, from the upper Heshanggou Formation, Ordos Basin. *"E." dongshengensis* is known only from the holotype IVPP V6073, a partial skull including right [frontal](/source/Frontal_bone), [prefrontal](/source/Prefrontal_bone), [lacrimal](/source/Lacrimal_bone), [maxilla](/source/Maxilla) with seven teeth and the right ramus of [lower jaw](/source/Lower_jaw). It was collected in the Wusilangou locality near [Dongsheng](/source/Dongsheng) (also in Nei Mongol), from the [Early Triassic](/source/Early_Triassic) [Shihtienfeng Formation](https://en.wikipedia.org/w/index.php?title=Shihtienfeng_Formation&action=edit&redlink=1).[1]

## Phylogeny

Recent [cladistic](/source/Cladistic) analyses suggested that *Eumetabolodon* is a [paraphyletic](/source/Paraphyletic) genus; the type species represents a relatively derived procolophonine, whereas *"E." dongshengensis* is a more basal procolophonid of the subfamily [Theledectinae](/source/Theledectinae). In 2020 a separate genus *[Youngetta](/source/Youngetta)* was named.

The [cladogram](/source/Cladogram) below follows the topology from a 2012 analysis by Cisneros.[2]

Procolophonidae Coletta Pintosaurus Sauropareion Phaanthosaurus Theledectinae "Eumetabolodon" dongshengensis (= Youngetta) Theledectes Tichvinskia Leptopleuroninae Procolophoninae Timanophon Kapes Thelephon Eumetabolodon bathycephalus Procolophon Teratophon Thelerpeton

## References

1. ^ [***a***](#cite_ref-Eumetabolodon_1-0) [***b***](#cite_ref-Eumetabolodon_1-1) J. L. Li (1983). "Tooth replacement in a new genus of procolophonid from the Early Triassic of China". *Palaeontology*. **26** (3): 567–583.

1. **[^](#cite_ref-Phylo08_2-0)** Juan Carlos Cisneros (2008). ["Phylogenetic relationships of procolophonid para reptiles with remarks on their geological record"](http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2052096). *Journal of Systematic Palaeontology*. **6** (3): 345–366. [Bibcode](/source/Bibcode_(identifier)):[2008JSPal...6..345C](https://ui.adsabs.harvard.edu/abs/2008JSPal...6..345C). [doi](/source/Doi_(identifier)):[10.1017/S1477201907002350](https://doi.org/10.1017%2FS1477201907002350). [S2CID](/source/S2CID_(identifier)) [84468714](https://api.semanticscholar.org/CorpusID:84468714).

- [Paleontology portal](https://en.wikipedia.org/wiki/Portal:Paleontology)

v t e Procolophonia Kingdom: Animalia Phylum: Chordata Superclass: Tetrapoda Clade: Amniota Class: Sauropsida Sauropsida see Sauropsida Procolophonia see below↓ Procolophonia Nyctiphruretidae? Abyssomedon Nyctiphruretus Pareiasauromorpha Lanthanosuchidae? Chalcosaurus Lanthaniscus? Lanthanosuchus Nycteroleteridae Bashkyroleter Emeroleter Macroleter Nycteroleter Rhipaeosaurus Pareiasauria Bradysaurus Bunostegos Deltavjatia Embrithosaurus Nochelesaurus Parasaurus Senectosaurus Yinshanosaurus Pumiliopareiasauria Anthodon Nanoparia Provelosaurus Pumiliopareia Therischia Arganaceras Elginia Obirkovia Pareiasaurus Sanchuansaurus Scutosaurus Shihtienfenia Procolophonoidea Owenettidae Barasaurus Candelaria Owenetta Ruhuhuaria Saurodektes Procolophonidae Coartaredens? Coletta Eomurruna Gomphiosauridion? Kinelia? Kitchingnathus Lasasaurus Oryporan Phaanthosaurus Pintosaurus Sauropareion Sauropia? Smilodonterpeton Sphenosaurus Spondylolestes? Suchonosaurus Theledectes Tichvinskia Tricuspisaurus? Xenodiphyodon? Youngetta Leptopleuroninae Basileosaurus? Cornualbus Hwiccewyrm Hypsognathus Koiloskiosaurus Leptopleuron Libognathus Mandaphon Neoprocolophon Pentaedrusaurus Phonodus Sclerosaurus Scoloparia Soturnia Threordatoth Procolophoninae Anomoiodon Burtensia Eumetabolodon Insulophon? Kapes Lestanshoria? Orenburgia Procolina Procolophon Samaria? Teratophon Thelephon Thelerpeton Timanophon

Taxon identifiers Eumetabolodon Wikidata: Q5409570 GBIF: 4823672 IRMNG: 1243213 Open Tree of Life: 4946217 Paleobiology Database: 37528

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Adapted from the Wikipedia article [Eumetabolodon](https://en.wikipedia.org/wiki/Eumetabolodon) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Eumetabolodon?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.