The phylogenetic investigation published in 2008 recovered seven clades that were well-supported by molecular and morphological characters, but no formal taxonomic reorganization of the family was proposed.
42.
Analyses that include morphological characters but still rely heavily on the sequences of DNA find a close relation between " Tomistoma " and " Gavialis ".
43.
Molecular phylogenetics has shown that morphological characters and chromosome numbers are so labile in the family that they cannot be used reliably to infer evolution, even at low taxonomic levels.
44.
Augmenting the morphological characters, it is also a much older lineage than any known Bombyliidae, dating from as far back as the Middle Jurassic ( " Palaeoplatypygus"
45.
The genus appears to have been neotenic, based on a few morphological characters and on the presence of calcified cartilage in the medulla of its humerus ( see thumbnail ).
46.
"M . nigriceps " is similar in appearance to " M . vindex ", but several morphological characters distinguish these two species from each other.
47.
The studies on dipteran relationships by Willi Hennig helped in the development of cladistics, techniques that he applied to morphological characters but now adapted for use with molecular sequences in phylogenetics.
48.
To create divisions in the family ( or even within the genus " Magnolia " ), solely based upon morphological characters, has proven to be a nearly impossible task.
49.
A recent study of native " Prunus fruticosa " stands in northern Poland finds it is disappearing there by " genetic erosion " or " disappearance of typical morphological characters ".
50.
In 2009, Parra-O and colleagues added more taxa and published a combined analysis of nuclear rDNA ( ETS + ITS ) and morphological characters published to clarify relationships within the genus.
