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22 March 2024 The Cornell University Entomological Expedition to South America of 1919–1920, Scientific Results: Incagonum jcbradleyi Liebherr and Will, New Species (Coleoptera: Carabidae: Platynini) from Peru
James K. Liebherr, Kipling W. Will
Author Affiliations +
Abstract

Incagonum jcbradleyi Liebherr and Will, new species is described from La Oroya, Junín Department, Peru. The type series was collected during J. C. Bradley's visit to Peru, May–August 1920. The species is taxonomically placed among Peruvian members of the genus and proposed as adelphotaxon to Incagonum hiekei Allegro, Giachino, and Moret. Whereas I. hiekei is characterized by brachypterous flight wings, the metathoracic wings of I. jcbradleyi are vestigial, i.e., not extended beyond the hind margin of the metanotum. Incagonum jcbradleyi exhibits diagnostic features of the genus, including the absence of subapical lateral setae on metatarsomere 4 and the presence of a digitiform basal process on the spermatheca. The latter structure is also part of the spermathecal assemblages of various Glyptolenus Bates species, supporting sister-group status of Incagonum Liebherr and Glyptolenus, both Neotropical genera. Discovery of I. jcbradleyi in Junín narrows the distributional gap between the northern set of Peruvian Incagonum species and Incagonum mateui (Moret) and Incagonum inca (Moret)—restricted to Cuzco and Puno departments—at the same time suggesting that substantial biodiversity of Peruvian Incagonum remains to be discovered in the intervening departments of Huancavelica, Ayacucho, and Apurímac.

James K. Liebherr and Kipling W. Will "The Cornell University Entomological Expedition to South America of 1919–1920, Scientific Results: Incagonum jcbradleyi Liebherr and Will, New Species (Coleoptera: Carabidae: Platynini) from Peru," The Coleopterists Bulletin 78(1), 89-97, (22 March 2024). https://doi.org/10.1649/0010-065X-78.1.89
Received: 18 September 2023; Accepted: 22 January 2024; Published: 22 March 2024
KEYWORDS
aptery
biogeography
brachyptery
Endemism
identification key
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