Hadrosteidae
Temporal range: Late Devonian
Reconstruction of Hadrosteus
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Placodermi
Order:
Arthrodira
Suborder:
Brachythoraci
Infraorder:
Coccosteina
Superfamily:
Dinichthyloidea
Family:
Hadrosteidae

Gross, 1932
Type species
Hadrosteus rapax
Gross, 1932
Genera

Hadrosteidae is a family of arthrodire placoderms from the Late Devonian. It was originally erected for the late Frasnian Hadrosteus, from the Kellwasserkalk facies. Later, the family was subjectively subsumed into Dinichthyidae due to Hadrosteus' anatomical similarities with Dunkleosteus and Dinichthys. In 1967, Obruchev placed the enigmatic arthrodire incertae sedis Diplognathus, from the Eastern American Famennian, within Hadrosteidae, on the basis of how the two genera have similar denticle ("teeth") patterns of the inferognathals, though, Denison (1978) contests this placement.[1][2] With the redefining of Dinichthyidae as a monotypic family for Dinichthys, and only a few other genera placed within Dunkleosteidae, Hadrosteidae is now seen as a valid family again.[3]

References

  1. ↑ Denison, Robert (1978). Placodermi Volume 2 of Handbook of Paleoichthyology. Stuttgart New York: Gustav Fischer Verlag. p. 105. ISBN 978-0-89574-027-4.
  2. ↑ CARR, ROBERT K.; GARY L. JACKSON (2005). "DIPLOGNATHUS LAFARGEI SP. NOV. FROM THE ANTRIM SHALE (UPPER DEVONIAN) OF THE MICHIGAN BASIN, MICHIGAN, USA" (PDF). Revista Brasileira de Paleontologia. 8 (2): 019–116 (113). doi:10.4072/rbp.2005.2.03.
  3. ↑ Carr, R.K. & W.J. Hlavin, 2010: Two new species of Dunkleosteus


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