Recently, studies on 18S rRNA sequences of coccal green algae belonging to Selenastraceae have demonstrated the inconsistency of several "small" genera separated on the basis of a single-character difference such as presence or absence of a pyrenoid [ 16].
The ITS data do not support the segregation of numerous small genera or Seriphidium from within the boundaries of Artemisia.
There is a basal group of small genera (Philaethria, Agraulis, Dione, Podotricha, Dryadula, Dryas).
Seriphidium as a distinct genus along with several small genera from within the boundaries of Artemisia s.l.l
He divided his list into two "sides" and found, as he predicted, "that a larger proportion of the species on the side of the larger genera present varieties, than on the side of the smaller genera".
A recent analysis of DNA sequences supported the splitting of Sterna into several smaller genera.
This classification broke up the non-monophyletic Cordylus[ 109] into several smaller genera, and we corroborate the non-monophyly of the former Cordylus and support the monophyly of the newly recognized genera.
Occurrence of Group II sequences was limited to organisms in a small group of genera of methanogenic Archaea, and six genera of eubacteria.
This situation resembles that in the Late Jurassic Morrison Formation of North America, which boasts up to five theropod genera over one tonne in weight, as well as several smaller genera (Henderson, 1998; Holtz et al., 2004).
Eriocaulales, the pipewort order of monocotyledonous flowering plants (i.e., those characterized by one seed leaf), consisting of one family, Eriocaulaceae, with 13 genera of small, tufted herbs with grasslike leaves that grow in aquatic and marshy habitats, mostly in tropical and subtropical regions, especially in South America.
