(N) :
(from , 'terrible' and 'fish') an extinct monospecific genus of large marine arthrodire placoderm from the Late Devonian (Famennian stage) measuring around long.
(N) :
(from , 'terrible' and 'fish') an extinct monospecific genus of large marine arthrodire placoderm from the Late Devonian (Famennian stage) measuring around long.