|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|G. Bechly 2002||Wing venational autapomorphies: The present hypothesis of closest relationships between the Callimokaltaniidae, Hemizygopteridae and Ditaxineuridae is supported by the analysis of Bechly (1998) who created the clade Ditaxineu- rida for [Callimokaltaniidae + Ditaxineuroidea (= Hemizy- gopteridae + Ditaxineuridae, sensu Bechly (1996))]. The clade Ditaxineurida is supported by the following synapomorphy: ‘free part of CuP between MP&Cu and AA nearly perpendicular to MP&Cu and AA’. The ‘presence of only few cross-veins in the antesubnodal area between RA and RP’ is also a synapomorphy shared by these taxa. The ‘presence of only a short distal posterior branch of RA’ could also be a synapomorphy of this clade but the polarization of this character remains difficult because it is unknown in the possible outgroups, as the ‘presence of a distal posterior branch of RA’ is a synapomorphy of the Protanisoptera.|