In 1866, Ferdinand Rudow circumscribed the Philopteridae genus Trabeculus with Trabeculus schillingi as its type species. In 1870, he created a new genus, Oncophorus with the same type species, making it an objectivejunior synonym of Trabeculus. In 1880, Édouard Piaget added more species to Oncophorus. He listed the author citation as "Rud." for Rudow in 1880, but as "m." for and Launcelot Harrison created a new genus name, Rallicola, in 1911. A new name was needed as Oncophorus and Oncophorus had a senior homonym and senior synonym, respectively. They only included Oncophorus species that parasitized rails and jacanas, leaving those that parasitized owls and hornbills to other genera. In 1915, Harrison split the genus into three subgenera: Rallicola for species found on Rallidae, Rallicola for those species found on Parridae, and Rallicola for species found on Apterygidae. Harrison's 1916 list ofMallophaga species recognized sixteen valid species in Rallicola, one in Parricola and three in Aptericola. In 1990, Eberhard Mey described a new species, Huiacola extinctus and circumscribed a new genus, Huiacola for it. Huiacola was subsequently classified as a subgenus of Rallicola''.
Type species
Johnston and Harrison designated "O. attenuatus " as its type species. This referred to a species Christian Ludwig Nitzsch named Philopterus attenuatus, which Édouard Piaget included in his 1880 taxonomy of Oncophorus. However, Nitzch's use of this name was nomen nudum as it was only accompanied with a queried indication to a previously-described taxon, namely Franz von Paula Schrank's 1781 description of Pediculus ortygometrae. The name only became available in 1838 as Nirmus attenatus, when Hermann Burmeister provided the same indication to Schrank but without marking it as questionable.
Synonyms
, six synonyms for this genus are recognized. Hopkins and Clay designated Oncophorus bisetosus as the type species of Piaget's Oncophorus. Harrison listed the type species of his subgenus Parricola as "Rallicola sulcata ", i.e., Oncophorus sulcatus. Three of its junior synonyms were named and circumscribed by M. A. Carriker, Jr. Carriker named the genus Furnaricola in 1944; his circumscription included its type species F. acutifrons as well as F. cephalosa, F. chunchotambo, F. heterocephala, F. laticephala, F. parvigenitalis, and F. titicacae, which were all described in the same work. In a 1949 paper, he created the genus Epipicus for his new species E. scapanoides. In another paper published in 1949, he named the genus Corvicola, which consisted of his newly-described species C. insulana. By 1952, Hopkins and Clay had classified Furnaricola, Epipicus, and Corvicola as junior synonyms of Rallicola. In a 1966 paper, Carriker defended the validity of Furnaricola as a distinct genus. and treated Furnaricola as its own genus in 1987, but in 1993 Price and Dale Clayton concurred with Hopkins and Clay's synonymization. In 1982, circumscribed the genus Psophiicola. Its type species is Liperus foedus, which he transferred from Rallicola. This was the only species included in his circumscription.
Hosts
In 1953, Theresa Clay reported that Rallicola have been found on 47 species across 25 genera of Rallidae. Rallicola can also be found on birds in the Aramidae, and Psophiidae families. The sole Huiacola species R.extinctus was found on the extinct huia bird, in the family Callaeidae. Species in Aptericola are found on Apterygidae.
