A large clade composed of taxa from the infraorders Anomura, Thalassinidea, and Brachyura is defined at node 54.
The more familiar spiders are grouped into the suborder Opisthothelae, which is itself divided into two infraorders.
Our phylogenetic analysis demonstrates that glyphcoids are legitimate members of the infraorder Astacidea and defines their relationship to other taxa within the clade.
Glaessner employed the classification scheme of Moore and McConnick that included 66 families of fossil and extant decapods arrayed in 18 superfamilies, 8 infraorders, and 2 suborders.
Our analysis places them as a basal clade in the infraorder based on a cervical groove that does not cross the midline of the carapace and the loss of the fractosternate condition.
Definition of infraorder in US English:
infraorder
nounˈinfrəˌôrdər
Biology
A taxonomic category that ranks below a suborder.
〔生〕下目（低于亚目的分类等级）
Example sentencesExamples
Our analysis places them as a basal clade in the infraorder based on a cervical groove that does not cross the midline of the carapace and the loss of the fractosternate condition.
A large clade composed of taxa from the infraorders Anomura, Thalassinidea, and Brachyura is defined at node 54.
Glaessner employed the classification scheme of Moore and McConnick that included 66 families of fossil and extant decapods arrayed in 18 superfamilies, 8 infraorders, and 2 suborders.
Our phylogenetic analysis demonstrates that glyphcoids are legitimate members of the infraorder Astacidea and defines their relationship to other taxa within the clade.
The more familiar spiders are grouped into the suborder Opisthothelae, which is itself divided into two infraorders.