Parapaguridae split from one clade of Diogenidae (Areopaguristes and Paguristes) in the Bathonian, Middle Jurassic (~167 MYA, Square I), while the family Coenobitidae is found nested within a slightly older clade of Diogenidae (~173 MYA, Square J), which includes most present day genera.
Present-day lycophytes are grouped in 6 genera (some botanists divide them into 15 or more): Huperzia, Lycopodiella, and Lycopodium, the club mosses or "ground pines"; Selaginella, the spike mosses; the unique tuberous plant Phylloglossum; and Isoetes, the quillworts.
Aristotle's classification of animals grouped together animals with similar characters into genera (used in a much broader sense than present-day biologists use the term) and then distinguished the species within the genera.
Like present-day great apes, the extant gibbons comprise four genera, which feature strikingly different numbers of chromosomes and extensive rearrangement of chromosomes [ 1- 6].
Extinct genera, such as Ginkgoites and Baiera, are known from fossilized leaves that are similar to those of the present-day tree.
Examination of global distributions of blenny genera included in our analysis and estimation of divergence times imply an origin of the Blenniiformes in the present-day IndoPacific region, consequently in the Tethys Sea around 60 million years ago.
Evolution is occurring among present-day insects.
Present-day Skyros is a resort.
