Unlike many similar taxonomic character
guides, Terry has included 12 images that are photographs of real body parts (e.g.
The factor of the lack of taxonomic character
material being examined and the extent of the distribution of biota, also result in not all variations of taxonomic characters
can be recorded from existing samples, so that many species produced will be reduced again in the future [18,19].
The hectocotylus is a valuable taxonomic character
that can be used to separate species (Brakoniecki, 1986).
Therefore, it is not possible to use exact counts and sizes of spurs to identify species, but the general characteristics of the 1st gonapophysis, especially if more than 1 specimen of a species is available, can usually be used as a sound taxonomic character
. Below are the general characteristics of the 1st gonapophysis of each species of Neoplea, except where the 1st gonapophysis is unknown.
Although apparently useful as a taxonomic character
in some genera (Hoge and Santos, 1953; Dowling et al.
Nevertheless, except for a few comments, usually concerning the appropriateness of using coloration as a taxonomic character
It was only later that Michaelsen (1918), when transferring meroic Brachydrilus to synonymy with Tritogenia, accepted the excretory system as a generic taxonomic character
for some of the South African indigenous earthworms; but he ignored the other typical characteristics.
It is important to note that if the DNA analysis cannot a priori replace a traditional taxonomic study, it may put forward inconsistencies in the interpretation of morphological characters and thus represents a supplementary taxonomic character
to be considered for species delineation.
The number of setigers in the anterior region has been utilized as a taxonomic character
; even though some authors dispute the usefulness of this trait, owing to the lack of a clear division between this region and the mid-region (Granados-Barba and Solis-Weiss, 1997; Read, 2000).
In addition to the relative position of these two trichobothria, it is noteworthy that several different arrangements of the dorsal and external trichobothria on pedipalp fixed finger have been identified in the entire genus (i.e., eb:esb:est/db:et:dt, eb:esb:db:est:et:dt, eb:esb:est:db:et:dt, eb:esb:db:est:dt/et, eb:db:esb:est:db:et, eb:db:esb:est:et:dt, beginning from the basal most and the "/" symbol indicating trichobothria at the same level), thus appearing to be a very useful taxonomic character
The biologic diversity included within this species designation has justified the use of a trinomial system for naming, including the subspecies, a taxonomic character
given formal recognition in the International Rules of Zoological Nomenclature.
The present work investigated the constancy of seed coat ornamentation among several local populations of Jovibarba heuffeli in order to evaluate the reliability of this character at the infraspecific level, as it was suggested that at the infragenerric/supraspecific level it could be a reliable taxonomic character
. Seeds (at least 20/specimen) from 19 individual plants of Jovibarba heuffeli Schott collected from seven locations in the Romanian Southern Carpatians (Herculane - 3ex, Domogled Mt.-8 ex, Buila Mt.