# Vladlenosaurus

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Extinct genus of temnospondyls

Vladlenosaurus Temporal range: Early Triassic Scientific classification Kingdom: Animalia Phylum: Chordata Clade: Tetrapoda Order: †Temnospondyli Suborder: †Stereospondyli Clade: †Capitosauria Genus: †Vladlenosaurus Morkovin and Novikov, 2000 Type species †V. alexeyevi Morkovin and Novikov, 2000

***Vladlenosaurus*** is an extinct [genus](/source/Genus) of [capitosaurian](/source/Capitosauria) [temnospondyl](/source/Temnospondyl) from Russia. It lived during the late [Vetlugian](https://en.wikipedia.org/w/index.php?title=Vetlugian&action=edit&redlink=1) ([Early Triassic](/source/Early_Triassic)). Based on the type of deposits it was found in, *Vladlenosaurus* probably inhabited [lacustrine](/source/Lake), or lake, habitats. The [type species](/source/Type_species) is *V. alexeyevi*, named in 2000.

## Description

Unlike the flatter, more rounded snouts of other capitosaurs, *Vladlenosaurus* had a wedge-shaped snout. This characteristic is also seen in [trematosaurians](/source/Trematosauria), although it was independently acquired in both cases as a result of [convergent evolution](/source/Convergent_evolution).[1]

## Classification

*Vladlenosaurus* is similar in appearance to the [benthosuchids](/source/Benthosuchus), a group of [trematosauroid](/source/Trematosauroidea) temnospondyls, but is more closely related to [mastodonsauroids](/source/Mastodonsauroidea). Among capitosaurs, it shares many features with the [basal](/source/Basal_(phylogenetics)) form *[Wetlugasaurus](/source/Wetlugasaurus)*, also from the Early Triassic of Russia. *Vladlenosaurus alexeyevi* was even considered to be a species of *Wetlugasaurus* in a 2006 study.[2] In a 2011 [phylogenetic](/source/Phylogenetic) analysis, the first to incorporate *Vladlenosaurus*, the genus was found to be most closely related to *[Odenwaldia](/source/Odenwaldia)*.[1] It and *Odenwaldia* formed a basal clade of capitosaurs more derived than *Wetlugasaurus*, the most basal capitosaur. Below is a modified [cladogram](/source/Cladogram) from Fortuny *et al* (in press) showing the relationship of *Vladlenosaurus* to other [stereospondyls](/source/Stereospondyl):[1]

Stereospondyli Lydekkerina Rhinesuchidae Capitosauria Wetlugasaurus Odenwaldia Vladlenosaurus Edingerella Watsonisuchus Xenotosuchus Cherninia Paracyclotosaurus Stenotosauridae Heylerosauridae Mastodonsauridae Trematosauria

## References

1. ^ [***a***](#cite_ref-FGS11_1-0) [***b***](#cite_ref-FGS11_1-1) [***c***](#cite_ref-FGS11_1-2) Fortuny, Josep; Galobart, À; De Santisteban, C. (2011). ["A new capitosaur from the Middle Triassic of Spain and the relationships within the Capitosauria"](https://web.archive.org/web/20110522161402/http://www.app.pan.pl/archive/published/app56/app20100025_acc.pdf) (PDF). *Acta Palaeontologica Polonica*. **56** (3): 553–566. [doi](/source/Doi_(identifier)):[10.4202/app.2010.0025](https://doi.org/10.4202%2Fapp.2010.0025). Archived from [the original](http://www.app.pan.pl/archive/published/app56/app20100025_acc.pdf) (PDF) on 2011-05-22. Retrieved 2011-01-02.

1. **[^](#cite_ref-Setal06_2-0)** Shishkin, M.A.; Sennikov, A.G; Novikov, I.V.; Ilyina, N.V. (2006). "Differentiation of tetrapod communities and some aspects of biotic events in the early triassic of Eastern Europe". *Paleontological Journal*. **40** (1): 1–10. [doi](/source/Doi_(identifier)):[10.1134/S0031030106010011](https://doi.org/10.1134%2FS0031030106010011). [S2CID](/source/S2CID_(identifier)) [129895753](https://api.semanticscholar.org/CorpusID:129895753).

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

v t e Stereospondyli Kingdom: Animalia Phylum: Chordata Clade: Tetrapodomorpha Order: Temnospondyli Tetrapodomorpha see Tetrapodomorpha Temnospondyli see Temnospondyli Stereospondyli see below↓ Stereospondyli Stereospondyli Arachana Capulomala Peltobatrachus Lapillopsidae Lapillopsis Manubrantlia Rhigerpeton Rotaurisaurus Rhinesuchidae Australerpeton? Broomistega Laccosaurus Parapytanga? Rastosuchus Rhineceps Rhinesuchoides Rhinesuchus Uranocentrodon Lydekkerinidae Chomatobatrachus Cryobatrachus Deltacephalus Eolydekkerina Indobenthosuchus Luzocephalus? Lydekkerina Capitosauria Antarctosuchus Bukobaja Calmasuchus Capitosaurus Cherninia Cyclotosaurus Edingerella Eocyclotosaurus Eryosuchus Heptasaurus Huangfuchuansuchus Jammerbergia Kestrosaurus Kupferzellia Mastodonsaurus Meyerosuchus Odenwaldia Paracyclotosaurus Parotosuchus Quasicyclotosaurus Procyclotosaurus Promastodonsaurus Rhadalognathus Samarabatrachus Sassenisaurus Sclerothorax Selenocara Stanocephalosaurus Stenotosaurus Subcyclotosaurus Tatrasuchus Vladlenosaurus Volgasaurus Volgasuchus Warrenisuchus Watsonisuchus Wellesaurus Wetlugasaurus Xenotosuchus Yuanansuchus Trematosauria see below↓ Trematosauria Trematosauria Almasaurus Bothriceps Callistomordax Chinlestegophis Keratobrachyops Laidleria Latiscopus Qantas Rileymillerus Syrtosuchus Uruyiella Benthosuchidae Benthosuchus Kwatisuchus Trematosauridae Angusaurus Aphaneramma Cosgriffius Erythrobatrachus Gonioglyptus Hyperokynodon Icanosaurus Indolyrocephalus Inflectosaurus Lyrocephaliscus Microposaurus Panchetosaurus Platystega Prothoosuchus Stoschiosaurus Tertrema Tertremoides Thoosuchus Tirraturhinus Trematolestes Trematosuchoides Trematosaurus Trematosuchus Trematotegmen Wantzosaurus Metoposauridae Anaschisma Apachesaurus Arganasaurus Buettnererpeton Dutuitosaurus Metoposaurus Panthasaurus Rhytidosteidae Boreopelta Mahavisaurus Nanolania Peltostega Pneumatostega Rhytidosteus Sangaia Trucheosaurus Derwentiinae Arcadia Acerastia Deltasaurus Derwentia Indobrachyops Rewana Chigutisauridae Arenaerpeton Chigutisaurus Compsocerops Koolasuchus Pelorocephalus Siderops Brachyopidae Banksiops Bathignathus Batrachosaurus Batrachosuchoides Batrachosuchus Blinasaurus Brachyops Gobiops Hadrokkosaurus Notobrachyops Platycepsion Sinobrachyops Vanastega Vigilius Xenobrachyops Plagiosauridae Gerrothorax Megalophthalma Plagiobatrachus Plagiorophus Plagiosaurus Plagioscutum Plagiosternum Plagiosuchus See also: Trematosauroidea Metoposauroidea Rhytidosteoidea Brachyopomorpha Brachyopoidea Plagiosauroidea Category

Taxon identifiers Vladlenosaurus Wikidata: Q7938948 GBIF: 9740996 Open Tree of Life: 7668398 Paleobiology Database: 367542

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