Youngolepis

Youngolepis Temporal range: Early Devonian
Photograph (a) & virtual rendering (b) of specimen IVPP V28375 in dorsal view
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Dipnoi
Genus:	†Youngolepis
Species:	†Y. praecursor
Binomial name
†Youngolepis praecursor Chang & Yu, 1981

Youngolepis is a genus of prehistoric lungfish which lived during the Early Devonian period (Lochkovian to Pragian stages, about 407-416 million years ago). Fossils of Y. praecursor have been found in the Xitun Formation of China & the Bac Bun Formation of Trang Xa, Vietnam.^[1] Some additional fossil specimens from the Xishancun Formation of China have been referred to Youngolepis sp. & represent the oldest known occurrence of the genus.^[2] In addition, Y. praecursor is also found in the Xujiachong formation

References

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Dipnomorpha

Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Sarcopterygii Clade: Rhipidistia
Gnathostomata see Gnathostomata Dipnomorpha see below↓ Dipnomorpha

Dipnomorpha	†Arquatichthys †Powichthys †Youngolepis? †Porolepiformes Durialepis Hamodus Heimenia Porolepis Quebecius Holoptychiidae Duffichthys? Glyptolepis Holoptychius Laccognathus Pseudosauripterus Ventalepis? Dipnoi †Ctenodus †Conchopoma †Diabolepis †Dianodipterus †Eoctenodus †Gosfordia †Ichnomylax †Iranorhynchus †Isityumzi †Janvierpaucidentes †Megapleuron †Oervigia †Orlovichthys †Powichthys? †Proceratodus †Rhinodipterus †Sagenodus †Straitonia †Tarachomylax †Tranodis †Westollrhynchus †Uranolophidae Melanognathus Uranolophus †Dipnorhynchidae Dipnorhynchus Ganorhynchus Speonesydrion †Stomiahykidae Archaeonectes Stomiahykus †Chirodipteridae Chirodipterus Gogodipterus Palaedaphus Pillararhynchus Sorbitorhynchus Sunwapta †Holodontidae Asthenorhynchus Griphognathus Holodipterus Iowadipterus Robinsondipterus Xeradipterus †Dipteridae Amadeodipterus Conchodus Dipterus Howidipterus †Fleurantiidae Barwickia Fleurantia †Rhynchodipteridae Rhynchodipterus Soederberghia †Phaneropleuridae Andreyevichthys Nielsenia Phaneropleuron Pentlandia Scaumenacia †Uronemidae Ganopristodus Uronemus Ceratodontoidei †Ferganoceratodus †Paraceratodus †Ptychoceratodus Neoceratodontidae †Archaeoceratodus †Asiatoceratodus †Mioceratodus Neoceratodus †Ceratodontidae Arganodus Ariguna Ceratodus Epiceratodus Lupaceratodus Metaceratodus Microceratodus? Potamoceratodus Retodus Tellerodus †Gnathorhizidae Beltanodus Gnathorhiza Microceratodus? Monongahela Namatozodia Palaeophichthys? Persephonichthys Lepidosirenidae Lepidosiren Protopterus

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