Heddleichthys Temporal range: Devonian (Famennian)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Clade:	Tetrapodomorpha
Clade:	Eotetrapodiformes
Family:	†Tristichopteridae
Genus:	†Heddleichthys Snitting, 2009
Species:	†H. dalgleisiensis
Binomial name
†Heddleichthys dalgleisiensis (Anderson, 1859)^[1]
Synonyms
Diplopterus Dalgleisiensis Anderson, 1859 Eusthenopteron? dalgleisiensis Jarvik, 1950

Heddleichthys is a genus of prehistoric sarcopterygian (lobe-finned "fish"), from the end of the Devonian period (Famennian). It was discovered in Dura Den Formation, Scotland. Heddleichthys is a derived tristichopterid, the first from Britain.

References

^ Snitting, D. (2009). "Heddleichthys- a new tristichopterid genus from the Dura Den Formation, Midland Valley, Scotland (Famennian, Late Devonian)". Acta Zoologica. 90: 273–284. doi:10.1111/j.1463-6395.2008.00376.x.

see Gnathostomata
Tetrapodomorpha	see below↓

†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?

†Elpistostege †Howittichthys †Livoniana †Qikiqtania †Rubrognathus †Tiktaalik
†Panderichthyidae	Panderichthys Parapanderichthys
Stegocephali (sensu Laurin, 2020)	see below↓ includes Tetrapoda