Debeeriidae

Debeeriidae is a family of holocephalan fishes from the Mississippian subperiod of the Carboniferous. It is the only family of the order Debeeriiformes.^[1] It is named after the type genus, Debeerius, which itself is named in honor of Gavin de Beer. Members of this family and order possess a spine on the first dorsal fin, an opercular cover over the gills,^[2] and an autodiastylic (two-jointed) jaw suspension.^[3] Both genera in the family are known from exceptionally well-preserved specimens found in the Bear Gulch Limestone member of the Heath Formation.^[2][3]

Debeeriidae Temporal range: Mississippian
Life reconstruction of Debeerius, the type genus
Life reconstruction of Heteropetalus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Holocephali
Order:	†Debeeriiformes Grogan & Lund, 2000
Family:	†Debeeriidae Grogan & Lund, 2000
Type genus
Debeerius Grogan & Lund, 2000
Genera
Debeerius Heteropetalus
Synonyms
Debeeridae Nelson (2006)