†family Mesacanthidae (spiny fish)
Chondrichthyes - Acanthodiformes - Mesacanthidae
Parent taxon: Acanthodiformes according to J. S. Nelson et al. 2016
Sister taxa: Acanthodidae, Cheiracanthidae, Howittacanthidae, Mesacanthus
Subtaxa: Melanoacanthus
Ecology: nektonic carnivore
Distribution: found only at Anderson River, 330km east of Inuvik (Devonian of Northern Territories)