arthrodire

English

Noun

arthrodire (plural arthrodires)

1. (zoology) Any member of the extinct order Arthrodira, armored jawed fishes that flourished in the Devonian period.
   • 2009 January 15, Martin D. Brazeau, “The braincase and jaws of a Devonian 'acanthodian' and modern gnathostome origins”, Nature Volume 457 No. 7227, doi:10.1038/nature07436:

     The basicranial circulation of Ptomacanthus resembles that in arthrodire placoderms.

Hypernyms

• placoderm