Further consideration of the phylogeny and classification of the order Arthrodira (Pisces: Placodermi)

Autor:	Robert H. Denison
Rok vydání:	1984
Předmět:	Monophyly biology Phylogenetics Placodermi Holonematidae Paleontology Brachythoraci Zoology SUPERFAMILY biology.organism_classification Arthrodira
Zdroj:	Journal of Vertebrate Paleontology. 4:396-412
ISSN:	1937-2809 0272-4634
DOI:	10.1080/02724634.1984.10012018
Popis:	Evaluation of the characters used to determine the phylogeny and classification of arthrodires leads to the following conclusions: Actinolepidae are defined only by characters primitive for the order. Holonematidae are not brachythoracans but are related to Phlyctaeniidae. Brachythoraci are difficult to define, but are probably monophyletic and are useful taxonomically. Buchanosteoids, heterosteoids, homosteoids and brachydeiroids all retain primitive characters that indicate an early origin among Brachythoraci, in spite of the specializations attained by each superfamily. Coccosteidae are the central stock of the major brachythoracan radiation, the Coccosteoidea, but can be defined only by the absence of the specializations of the families to which they gave rise; these include the Rhachiosteidae, Pholidosteidae, Camuropiscidae and Incisoscutidae fam. nov., as well as the Dinichthyidae which are grouped with the Leiosteidae and Trematosteidae in a separate superfamily, Dinichthyoidea.
Databáze:	OpenAIRE
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