Hadrosteidae

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Hadrosteidae
Temporal range: Late Devonian
Hadrosteus rapax.jpg
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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