4.1 Article

Four species in one: taxonomic revision of the Eirmocides helenita (Semper, 1879) complex (Lepidoptera: Lycaenidae) from Australia and New Guinea

Journal

AUSTRAL ENTOMOLOGY
Volume 62, Issue 2, Pages 167-190

Publisher

WILEY
DOI: 10.1111/aen.12646

Keywords

area of endemism; butterfly; Candalides; Candalidini; molecular phylogeny; Papilionoidea

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This study investigates the taxonomy of the Eirmocides helenita complex, which includes five species within the monophyletic lineage referred to as the E. helenita species-group. Four of these species, previously classified under Eirmocides helenita and characterized by iridescent turquoise coloration in males, are mainly distributed in different geographical areas. The fifth member of the group is sympatric with one of the species on mainland New Guinea. The taxonomic revision increases the recognized number of species in Eirmocides and the tribe Candalidini.
Taxonomic investigations of the Eirmocides helenita (Semper, 1879) complex from north-eastern Australia and mainland New Guinea based on adult morphology (male genitalia and wing colour pattern elements), together with a phylogenetic hypothesis of the genus (18 or 69% of the recognised species) based on molecular data (1 mitochondrial and 12 nuclear genes), and examination of type material, indicate that there are five species within this monophyletic lineage, here referred to as the E. helenita species-group. Four of the species, previously classified under the name Eirmocides helenita (Semper, 1879) sensu lato and characterised by iridescent turquoise dorsal colouration in the male, are predominantly allopatric, as follows: Eirmocides callainus Braby & Muller, sp. nov., is endemic to the Wet Tropics biome of north-eastern Queensland; Eirmocides helenita (Semper, 1879) sensu stricto is restricted to Cape York Peninsula of northern Queensland; Eirmocides rouku Braby & Muller, sp. nov., is endemic to the Western Province of southern Papua New Guinea; and Eirmocides dimorphus (Rober, 1886), stat. rev., occurs more widely throughout mainland New Guinea and its adjacent islands. The fifth member of the group, Eirmocides cupreus (Rober, 1886), is sympatric with E. dimorphus on mainland New Guinea. The taxonomic revision brings to 26 the total number of species recognised in Eirmocides and within the tribe Candalidini to 40 species. Lectotypes are designated for Plebeius dimorphus Rober, 1886, Plebeius dimorphus var. cupreus Rober, 1886, and Holochila subargentea Grose-Smith & Kirby, 1896.

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