Osteichthyes - Dipnorhynchiformes - Dipnorhynchidae

Alternative spellings: Speonysedrion, Sponysedrion

Full reference: K. Campbell and R. Barwick. 1983. Early evolution of dipnoan dentitions and a new genus of Speonesydrion. Memoirs of the Association of Australasian Palaeontology 1:17-47

Parent taxon: Dipnorhynchidae according to R. van der Laan 2019

See also Campbell and Barwick 1990, Hanke and Wilson 2004, Marshall 1986, Schultze 1993, Schultze 2001 and Sepkoski 2002

Sister taxa: Dipnorhynchus, Dipnotuberculus, Erikia, Ichnomylax

Subtaxa: Speonesydrion iani

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Ecology:

Distribution: found only at Rocky Flat, Goodradigbee Inlet, Receptaculites Limestone (Devonian of Australia)

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Specimen images are retrieved through the ePANDDA API.