Molecular investigation of the genus has revealed that Ranunculus is not monophyletic with respect to a number of other recognized genera in the family – e. g. Ceratocephala, Halerpestes, Hamadryas, Laccopetalum, Myosurus, Oxygraphis, Paroxygraphis and Trautvetteria.

Some ( older ) classifications list only two species in the genus Papio, this one and the Hamadryas baboon.

Hamadryas has been very popular as a genus name, but most of these names are now invalid:

* Hamadryas ( butterfly ), the genus of brush-footed butterflies commonly known as the Calicoes, Clicks, or Crackers ; established by Hübner in 1806 and still valid

* Hamadryas ( plant ), a plant genus in family Ranunculaceae, established by Commerson based on de Jussieu in 1789 and still valid

* Hamadryas, the genus of owl butterflies invalidly established by Mikan in or about 1821 ; now Caligo

* Hamadryas, a genus of milkweed butterflies invalidly established by Boisduval in 1832 ; now Tellervo

* Hamadryas, the genus of baboons invalidly established by Lesson in 1840 ; now Papio

* Hamadryas, a genus of bulimuline snails invalidly established by Albers in 1850 ; now Otostomus

* Hamadryas, the genus of the Manchester Moth invalidly established by Clemens in 1864 ; now Euclemensia

Like all baboons, Hamadryas baboons are intrigued by their infants and give much attention to them.

Euphorbia regisjubae ( King Juba's Euphorbia ) was named to honor the king's contributions to natural history and his role in bringing the genus to notice.

Euphorbia regisjubae ( King Juba's Euphorbia ) was named to honor the king's contributions to natural history and his role in bringing the genus to notice.

The name of the genus, Lodoicea, is derived from Lodoicus, the Latinised form of Louis, in honour of King Louis XV of France.

The genus Sarcoramphus, which today contains only the King Vulture, had a wider distribution in the past.

The King Fern, Ptisana salicina, from New Zealand and the South Pacific and known in Māori as para now has been placed in this genus.

Basilosaurus (" King Lizard ") is a genus of cetacean that lived in the Late Eocene.

Polygonatum (), King Solomon's-seal or Solomon's Seal, is a genus of about 50 species of flowering plants.

The genus of the venomous King Cobra ( Ophiophagus hannah ) is named for this habit.

The fact that the members of a certain genus Achtum ( Ahtum kindred ) owned landed property in Csanád County until the end of the Middle Ages may suggest that King Stephen I let Ahtum ’ s descendants keep some part of Ahtum ’ s possessions.

The genus is named for Julius Gottfried Conrad Hecht ( 1771-1837 ), German counselor to the King of Prussia.

Darlingtonia californica (), also called the California Pitcher plant, Cobra Lily, or Cobra Plant, is a carnivorous plant, the sole member of the genus Darlingtonia in the family Sarraceniaceae.

* Neaera, bivalve genus invalidly established by Griffith & Pidgeon in 1834 ; now Cuspidaria

* Neaera, slug moth genus invalidly established by Herrich-Schäffer in 1854 ; now synonym of Latoia

* Neaera, ethmiid moth genus invalidly established by Chambers in 1880 ; now synonym of Elachista

* Tegeticula, a prodoxid moth genus invalidly described as Thia by H. Edwards in 1888

The name Chloris was also invalidly used for the bird genus Parula.

: The twirler moth genus invalidly described by Heinemann in or around 1870 has been synonymized with Brachmia.

: For the bird genus, see Passerina ( as originally described by Bartram in 1791 ) or Carduelis ( as invalidly established by Bechstein in 1802 ).

This genus name was also invalidly given to a toad bug genus ( now Gelastocoris ) by Latreille around 1802, to the rockfowl ( now Picathartes ) by Wagler in 1827, and to the Brown-eared Bulbul ( Microscelis amaurotis ) by Kittlitz in 1832.

* Eunice, a genus of brush-footed butterflies invalidly established by Geyer in 1832 ; now Eunica

* Lena, a moth genus invalidly established by Herz in 1903 ; nowadays included in Xestia

The grass moth genus Crossophora, invalidly described by H. B.

* Talitha, a gelechoid moth genus in subfamily Depressariinae, invalidly named by Clarke in 1978 and later renamed Hozbeka

The genus was established by Carl Linnaeus in 1753.

He established the genus Selaginella as a monotypic genus, and placed the bulk of species in Stachygynandrum.

Species more or less completely parasitic include the leafless quintral, Tristerix aphyllus, which lives deep inside the sugar-transporting tissue of a spiny cactus, appearing only to show its tubular red flowers, and the genus Arceuthobium ( dwarf mistletoe ; Santalaceae ) which has reduced photosynthesis ; as an adult, it manufactures only a small proportion of the sugars it needs from its own photosythesis but as a seedling it actively photosynthesizes until a connection to the host is established.

* Neaera ( fly ), tachinid fly genus established by Robineau-Desvoidy in 1830

* Neaera, plant genus from the amaryllis family established by Salisbury in 1866 ; now synonym of Clinanthus

* Neaira ( bug ), true bug genus established by Linnavuori 1973

* Nirvana ( leafhopper ), a leafhopper genus established by Kirkaldy in 1900

* Nirvana, an invalid butterfly genus established by Tsukada and Nishiyama in 1979 ; now Nirvanopsis

In 1742, on the basis of a specimen received from La Condamine, Linnaeus named the tree Quinquina condaminiae and established a new genus, which he termed Cinchona quinquina condaminiae.

This is the principle that within the family group, genus group and species group a name established for a taxon at any rank in the group is deemed to be simultaneously established with the same author and date for taxa based on the same name-bearing type at other ranks in the corresponding group.

In 1764 he established a genus Noctua Linné, 1764 for birds, ignoring that he had already used this name a few years ago in Lepidoptera.

If that name cannot be used ( for example because an older name established prior to 1858 takes precedence ), this does not mean that the 1868 name can be used for a hemipteran genus.

: The genus Tandonia was established in animals ( Gastropoda: Tandonia ), in plants ( Euphorbiaceae ) and in Fungi ( Ascomycetes ).

::: Montfort 1810 established the genus Theodoxus ( Gastropoda ) and designated Theodoxus lutetianus Montfort 1810 as type species ( currently Theodoxus fluviatilis ).

::: Riedel 1987 established the genus Turcozonites ( Gastropoda ) and designated Zonites wandae Riedel, 1982 as type species ( currently Turcozonites wandae ).

::: Draparnaud 1801 established the gastropd genus Succinea and included two species, Succinea amphibia Draparnaud 1801 and Succinea oblonga Draparnaud 1801.

The genus Musa was formally established in the first edition of Linnaeus ' Species Plantarum in 1753 — the publication that marks the start of the present formal botanical nomenclature.

The phylogenetic relationshsips of the genus Oriolus have been well established.

Close similarities were then noticed with an already established dinosaur genus, Paronychodon ( Cope 1876 ), also based on teeth from the Laramie Formation.

It was finally assigned to Baiotomeus by Hartman in 1986 — which is before Krause formally established the genus in 1987.