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Bruntonichthys
''Bruntonichthys'' is an extinct monospecific genus of arthrodire placoderm from the Early Frasnian stage of the Late Devonian period. Fossils are found in the Gogo Formation of the Kimberley region of Australia. The skull is about 139 millimetres long, and had proportionally large eye sockets. Researchers suggest it may have preyed on small mollusks.DENNIS, K. and MILES, R. S. (1980), New durophagous arthrodires from Gogo, Western Australia. Zoological Journal of the Linnean Society, 69: 43–85. Phylogeny ''Bruntonichthys'' is a basal member of the clade Aspinothoracidi, which belongs to the clade Pachyosteomorphi, one of the two major clades within Eubrachythoraci. The cladogram below shows the phylogeny A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spe ... of ''Bruntonich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspinothoracidi
Aspinothoracidi is a clade of placoderms, extinct armored fish most diverse during the Devonian. The gigantic apex predator ''Dinichthys'', is the best-known member of this group. Many other genera, such as the infamous ''Dunkleosteus'', were previously thought to be close relatives of ''Dinichthys'' and were grouped together in the family Dinichthyidae, though more recent studies have restricted that family to only its type species. Phylogeny Eubrachythoraci is divided into the clades Coccosteomorphi and Pachyosteomorphi, the latter of which can be further sub-divided into Aspinothoracidi and Dunkleosteoidea, as shown in the cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to ... below: References Arthrodires {{Placoderm-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |