is a quite unusual apomorphy
in the Diaphorinae (a male secondary sexual character?
Potentially, a partially fused T6 and protandrium may be an apomorphy
of Pachycerina, or at least a subclade of the genus.
Therefore, I consider a concave ocp an apomorphy within the Chyromyidae.
I consider its loss in some Chyromyidae an apomorphy.
The types of definitions permitted in phylogenetic nomenclature basically fall into three categories: node-based definitions, stem-based definitions, and apomorphy definitions.
In the Cyperaceae example, the intensional connotations could be preserved by simply using an apomorphy definition citing the apomorphic characters that are commonly associated with the name.
The first one is a name defined by specifying a phylogenetic definition (node based, stem based, or apomorphy
based) and by designating two (or more) specifiers to refer to a particular taxon (or clade) under a particular phylogenetic hypothesis (or cladogram).
Accordingly, definitions might be of three types: node based, stem based, or apomorphy
These definitions (node based, stem based and apomorphy
based) are based solely on common descent, the idea being to "point at" a common ancestor and all of its descendants.
13) may be an additional apomorphy
of Cassiope, but such leaves commonly occur within Clade 1 (Fig.
It is significantly different from the plasmodial type as found in Haemodoraceae and Commelinaceae, and may be an apomorphy
for some Zingiberales.
The tenuinucellate condition is an apomorphy
for the remaining genera of Alliaceae, although Ashurmetov and Yengalycheva (in press) reported a "mediocrinucellate" type for Allium, somehow intermediate between the crassinucellate and tenuinucellate types.