Rhodacanthis

Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Olfactores
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Sauropsida
Cladus: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Neodiapsida
Cladus: Sauria
Cladus: Archelosauria
Cladus: Archosauromorpha
Cladus: Crocopoda
Cladus: Archosauriformes
Cladus: Eucrocopoda
Cladus: Archosauria
Cladus: Avemetatarsalia
Cladus: Ornithodira
Cladus: Dinosauromorpha
Cladus: Dinosauriformes
Cladus: Dracohors
Cladus: Dinosauria
Cladus: Saurischia
Cladus: Theropoda
Cladus: Neotheropoda
Cladus: Averostra
Cladus: Tetanurae
Cladus: Avetheropoda
Cladus: Coelurosauria
Cladus: Tyrannoraptora
Cladus: Maniraptoromorpha
Cladus: Maniraptoriformes
Cladus: Maniraptora
Cladus: Pennaraptora
Cladus: Paraves
Cladus: Eumaniraptora
Cladus: Avialae
Subclassis: Aves
Ordo: Passeriformes
Subordo: Passeri
Infraordo: Passerida
Superfamilia: Passeroidea

Familia: Fringillidae
Subfamilia: Carduelinae
Genus: †Rhodacanthis
Species (4): R. flaviceps – R. forfex – R. litotes – R. palmeri
Name

Rhodacanthis Rothschild, 1892

References

James, H.F.; Olson, S.L. 2005: The diversity and biogeography of koa-finches (Drepanidini: Rhodacanthis), with descriptions of two new species. Zoological journal of the Linnean Society, 144(4): 527–541. DOI: 10.1111/j.1096-3642.2005.00173.x

Rhodacanthis is an extinct genus of Hawaiian honeycreepers commonly known as koa finches. All four species were endemic to the Hawaiian Islands. Members of this genus were granivores, with bills adapted to the seeds and pods of legumes. The two species that became extinct in the 1890s, R. flaviceps and R. palmeri, inhabited upper elevation mesic forests dominated by koa (Acacia koa) on the island of Hawaiʻi.[1] Both were large birds; R. flaviceps measured 19 cm (7.5 in), while R. palmeri was 23 cm (9.1 in) in length.[2] The combination of a giant bill with brightly colored plumage (yellow for R. flaviceps, orange for R. palmeri) gave the males a very striking appearance. Koa seeds were the preferred food for the two species, but caterpillars were taken if necessary. The two prehistoric species, R. forfex and R. litotes, were denizens of more lowland tropical dry forests and shrublands on Kauaʻi, Maui, and Oʻahu. It is speculated that koaiʻa (Acacia koaia) was an important food source for both species, as their range did not overlap with that of koa. Kanaloa (Kanaloa spp.) pods and ʻaʻaliʻi (Dodonaea viscosa) berries were probably also eaten in addition to the occasional caterpillar.[1]
Species

Rhodacanthis flaviceps Rothschild, 1892 – lesser koa finch (extinct, 1891)
Rhodacanthis forfex James & Olson, 2005 – scissor-billed koa finch (prehistoric)
Rhodacanthis litotes James & Olson, 2005 – primitive koa finch (prehistoric)
Rhodacanthis palmeri Rothschild, 1892 – greater koa finch (extinct, 1896)