Mesacanthidae is a family of fish that existed during the

Devonian The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...

in Northwestern Europe. It is part of the order

Acanthodiformes Acanthodiformes (alternatively spelled Acanthodida) is an Order (biology), order of "Acanthodii, acanthodians" which lived from the Early Devonian to the Early Permian. Members of the order have been found Cosmopolitan distribution, worldwide in ...

, and includes the genera of '' Mesacanthus'', '' Lodeacanthus'', '' Melanacanthus'', '' Teneracanthus'', and '' Promesacanthus''.

References

Taxa described in 1939 Acanthodiformes Prehistoric fish families {{Acanthodii-stub