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Pseudophlegethontia Temporal range: Late Carboniferous, 300 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Fossil of P. turnbullorum in the Field Museum of Natural History
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Clade:	Tetrapodomorpha
Order:	†Aistopoda
Clade:	†Phlegethontioidea
Family:	†Pseudophlegethontiidae Anderson, 2003
Genus:	†Pseudophlegethontia Anderson, 2003
Species:	†P. turnbullorum
Binomial name
†Pseudophlegethontia turnbullorum Anderson, 2003

Pseudophlegethontia is an extinct genus of aïstopod tetrapodomorphs. It is the only member of the family Pseudophlegethontiidae. The only species is the type species P. turnbullorum, named in 2003. Fossils of Pseudophlegethontia have been found from the Mazon Creek fossil beds in Grundy County, Illinois, a conservation lagerstätte well known for the exceptional preservation of middle Pennsylvanian taxa.

Pseudophlegethontia has been considered to be morphologically intermediate between derived phlegethontiids and more basal "ophiderpetontids" such as Ophiderpeton. It possesses basal characters such as a relatively short body, "k shaped" ribs, and distinctive skull roof bones while also possessing several more derived features such as a pointed snout, thin gastralia, and a lack of dorsal osteoderms. It is usually, but not unanimously, placed as the sister taxon to phlegethontiids, represented by Phlegethontia.

References

1. ^ Anderson, J. S. (2003). "A new aïstopod (Tetrapoda:Lepospondyli) from Mazon Creek, Illinois". Journal of Vertebrate Paleontology. 23 (1): 79–88. doi:10.1671/0272-4634(2003)23[79:anatlf]2.0.co;2. S2CID 85104000.
2. Ruta, Marcello; Jeffery, Jonathan E.; Coates, Michael I. (2003-12-07). "A supertree of early tetrapods". Proceedings of the Royal Society of London. Series B: Biological Sciences. 270 (1532): 2507–2516. doi:10.1098/rspb.2003.2524. PMC 1691537. PMID 14667343.
3. Anderson, Jason S.; Carroll, Robert L.; Rowe, Timothy B. (2003). "New information on Lethiscus stocki (Tetrapoda: Lepospondyli: Aistopoda) from high-resolution computed tomography and a phylogenetic analysis of Aistopoda" (PDF). Canadian Journal of Earth Sciences. 40 (8): 1071–1083. Bibcode:2003CaJES..40.1071A. doi:10.1139/e03-023.
4. Marjanović, David; Laurin, Michel (2019-01-04). "Phylogeny of Paleozoic limbed vertebrates reassessed through revision and expansion of the largest published relevant data matrix". PeerJ. 6: e5565. doi:10.7717/peerj.5565. ISSN 2167-8359. PMC 6322490. PMID 30631641.

v t e Tetrapodomorpha (Pan-Tetrapoda)
Kingdom: Animalia Phylum: Chordata Clade: Osteichthyes Clade: Sarcopterygii Clade: Rhipidistia Gnathostomata see Gnathostomata Tetrapodomorpha see below↓
Tetrapodomorpha Tetrapodomorpha †Bogdanovia †Chrysolepis †Geptolepis †Glyptopomus †Gogonasus †Greiserolepis †Gyroptychius †Harajicadectes †Kenichthys †Litoptychus †Lamprotolepis †Latvius †Medoevia †Megadonichthys †Muranjilepis †Osteolepis †Peregrina †Platyethmoidia †Shirolepis †Thaumatolepis †Thursius †Tungsenia †Viluichthys †Rhizodontida Archichthys Aztecia Barameda Gooloogongia Hongyu Letognathus Propycnoctenion Pycnoctenion Rhizodus Rossichthys Sauripterus Screbinodus Strepsodus Thysanolepis? Vorobjevaia? †Canowindridae Beelarongia Canowindra Koharalepis Marsdenichthys? Owensia? †Megalichthyidae Askerichthys Cladarosymblema Cryptolepis? Ectosteorhachis Lohsania? Mahalalepis Megalichthys Megapomus? Megistolepis? Palatinichthys Rhizodopsis Sengoerichthys Sterropterygion? Eotetrapodiformes †Palaeospondylus? †Tristichopteridae Bruehnopteron Cabonnichthys Callistipterus Canningius Devonosteus Edenopteron Eusthenodon Eusthenopteron Heddleichthys Hyneria Jarvikina Langlieria Litoptychus? Mandageria Marsdenichthys? Notorhizodon Platycephalichthys Spodichthys Tinirau Tristichopterus Elpistostegalia †Howittichthys? †Livoniana †Panderichthys †Parapanderichthys †Qikiqtania †Rubrognathus †Tiktaalik Stegocephali (Tetrapoda sensu lato) see below↓
Stegocephali (Tetrapoda sensu lato) Devonian taxa †Acanthostega †Brittagnathus †Densignathus †Elpistostege? †Hynerpeton †Ichthyostega †Jakubsonia †Metaxygnathus †Parmastega †Sinostega †Tiktaalik? †Tulerpeton †Tutusius †Umzantsia †Ventastega †Ymeria †Elginerpetontidae Elginerpeton Obruchevichthys Webererpeton Post-Devonian taxa †Antlerpeton †Aytonerpeton †Crassigyrinus †Diploradus †Doragnathus †Gaiasia †Ichthyerpeton †Koilops †Mesanerpeton †Occidens †Ossirarus †Perittodus †Sigournea †Tantallognathus †Aistopoda Andersonerpeton Lethiscus Ophiderpeton Oestocephalidae Coloraderpeton Oestocephalus Phlegethontioidea Pseudophlegethontia Phlegethontiidae Phlegethontia Sillerpeton †Whatcheeriidae Ossinodus? Pederpes Whatcheeria †Colosteidae Colosteus Deltaherpeton Greererpeton Pholidogaster †Adelospondyli Acherontiscus Adelogyrinidae Adelogyrinus Adelospondylus Dolichopareias Palaeomolgophis †"Nectridea" see Nectridea †Baphetoidea Eucritta? Spathicephalus Baphetidae Baphetes Kyrinion Loxomma Megalocephalus †Embolomeri Anthracosaurus Archeria Aversor Calligenethlon Carbonoherpeton "Cricotus" Diplovertebron Eobaphetes Eoherpeton? Leptophractus Neopteroplax Palaeoherpeton Papposaurus Pholiderpeton Proterogyrinus Pteroplax Seroherpeton Spondylerpeton †Gephyrostegidae Bruktererpeton Eusauropleura Gephyrostegus †Other "anthracosaurs" Caerorhachis Casineria? Eldeceeon Eoherpeton Silvanerpeton Termonerpeton Crown group Tetrapoda Temnospondyli (Batrachomorpha see Temnospondyli includes Lissamphibia Reptiliomorpha (Pan-Amniota) see Reptiliomorpha includes Amniota
Related topics Paraphyletic / Polyphyletic groups Stem tetrapoda Osteolepiformes Osteolepididae Megalichthyiformes? Tristichopteridae? Labyrinthodontia Rachitomi Ichthyostegalia Lepospondyli Holospondyli Phyllospondyli Anthracosauria Other topics Evolution of tetrapods Polydactyly in stem-tetrapods Romer's gap Timeline Zachelmie trackways
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