RT info:eu-repo/semantics/article T1 A new Aphid genus and species (Hemiptera: Aphididae: Macrosiphini) living on ferns in Costa Rica and Mexico A1 Pérez Hidalgo, Nicolás A1 Nieto Nafría, Juan Manuel A1 Martínez Torres, David A1 Villalobos Muller, William A2 Zoologia K1 Biología K1 Ecología. Medio ambiente K1 Zoología K1 Aphididae K1 Aphid K1 Costa Rica K1 Hemiptera K1 México AB Aphid species colonising ferns belong to the subfamily Aphidinae (Hemiptera:Aphididae) and the majority of these to the tribe Macrosiphini. A new genus in this tribe and its typespecies: Gibbomyzus pteridophytorum new genus, new species, are established. Apterous and alateviviparous females are described from specimens collected on Blechnum buchtienii Rosenstock(Blechnaceae) in Costa Rica and on Pteridium aquilinum (Linnaeus) Kuhn (Dennstaedtiaceae) and anunidentified fern in Mexico. The taxonomic validity of the two new taxa is discussed based onmorphological and molecular data. Morphologically, the new genus is compared with genera withswollen siphunculi recorded in the New World, and also with genera living on ferns anywhere in theworld. The identification key by Blackman and Eastop to aphids living on ferns is modified. Molecularanalyses were carried out on the sequences of a fragment of the mitochondrial gene encoding forcytochrome c oxidase subunit 1 and of a fragment of the nuclear gene encoding elongation factor-1alpha. In both analyses, G. pteridophytorum new species sequences showed considerable divergence(,4% or more) from those of 23 other species from diverse genera of Macrosiphini, supporting theconclusions of the morphological study and justifying the establishment of the new genus PB Entomological society of Canada YR 2016 FD 2016-02-22 LK http://hdl.handle.net/10612/5112 UL http://hdl.handle.net/10612/5112 NO Canada Entomologist, 2013,vol. 145,n. 5 NO P. 509-520 DS BULERIA. Repositorio Institucional de la Universidad de León RD 28-mar-2024