Sentence examples for most primitive genera from inspiring English sources

Except in the most primitive genera, the flowers grow directly on the stem at the areoles.

The most primitive living genera, such as Chionelasmus and Catophragmus, appeared in the late Mesozoic Era (251 million to 65.5 million years ago) and early Paleogene Period (65.5 million to 23 million years ago).

Previous thoughts regarding evolution of the these genera that Aureolaria is the most primitive genus and closely resembles the common ancestor of the group [ 14] are clearly incorrect.

This seems to be the case here, where no hybrids are known among the older taxa in the "primitive genera" (Figs. 1, 3), and hybridization is restricted to the three most recently diversified groups: genus Eueides, the erato-sara-sapho group and the melpomene-cydno-silvaniform group within the genus Heliconius.

Prosobranch gastropods are the most primitive.

It is the most primitive kind of cow fat.

The affinities of certain primitive genera such as Hyrachus and Colonoceras remain controversial; Simpson places them in the family Hyrachyidae, superfamily Rhinocerotoidea.

Except for the more primitive genera, few of the cacti have functional leaves, the photosynthetic functions of the plant having been taken over by the stem.

It is the most primitive kind of cow fat..

Sonically, it was the most primitive song we ever released".

Most authorities now recognize Scutellosaurus as the most primitive known member of the Thyreophora.