However, the characters linking these two groups were weak, and the question as to whether or not " Rauisuchia " forms a natural group remains unresolved.
32.
Based on this, Cuatrecasas made a phylogenetic ordination into natural groups or series where the derived species are more diverse and are found at high altitudes.
33.
This anatomical structure was apparently lost ( or was gained ) in several groups in convergence and is therefore not suitable for the delimitation of natural groups.
34.
Some studies based on a different type of analysis have found that Ctenochasmatoidea, as usually thought of, is not a natural group ( making it paraphyletic ).
35.
While Carl Linnaeus typically is credited for the plant kingdom classification system, it was Magnol who first used " family " to describe natural groups of plants.
36.
Even with natural groups, it is portrayed in trait-attributes, which is not different from those used to characterize individuals ( Boski et al ., 2004 ).
37.
They defined it as the natural group formed by all descendants of the common ancestor of the type species, " Bohaiornis guoi ", and " Shenqiornis mengi ".
38.
In such a case, the scale group is the natural group structure, and the corresponding prior on " X " is proportional to 1 / " x ".
39.
Phylogenetic research in 1998 and 1999 supported the idea that the hagfish and the lampreys form a natural group, the Cyclostomata, that is a sister group of the Gnathostomata.
40.
Recent molecular phylogenetic studies show that the genus " Candida " as currently used is extremely polyphyletic ( encompassing distantly related species that don't form a natural group ).
