Braunosteus

Braunosteus schmidti is a medium-sized selenosteid arthrodire placoderm known from the Upper Frasnian Kellwasserkalk facies of Late Devonian Bad Wildungen, Germany. B. schmidti has a broad skull about 9 centimeters long, and a short, but pointed rostrum. Its appearance is very similar to that of the basal selenosteid Pachyosteus.[2]

Braunosteus
Temporal range: Late Frasnian[1]
Artist's reconstruction
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Subphylum:
Vertebrata
Class:
Placodermi
Order:
Arthrodira
Suborder:
Brachythoraci
Infraorder:
Coccosteina
Superfamily:
Dinichthyloidea
Family:
Selenosteidae
Genus:
Braunosteus
Species:
B. schmidti
Binomial name
Braunosteus schmidti

It was originally placed within a monotypic family, "Braunosteidae," by Erik Stensiö in 1959. Obruchev (1964) and Miles (1969) placed it within the Trematosteidae due to the presence of a postpineal fenestra. Denison (1978) has B. schmidti placed within Selenosteidae, noting that other arthrodires in addition to trematosteids have postpineal fenestrae, as well as similar anatomy of the orbital and suborbital plates, and that its scapulo-coracoid bone is largely identical to those of Pachyosteus and Enseosteus.

References
  1. Denison, Robert (1978). Handbook of Paleoichthyology, Volume 2, Placodermi. New York: Gustav Fischer Verlage. p. 94. ISBN 9780895740274.
  2. RÜCKLIN, MARTIN (January 14, 2011). "First selenosteid placoderms from the eastern Anti-Atlas of Morocco; osteology, phylogeny and palaeogeographical implications". Palaeontology. 56 (1): 25–62. doi:10.1111/j.1475-4983.2010.01026.x.


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