A New Genus and Two New Species of the Subfamily Nesomesochorinae Ashmead (Insecta: Hymenoptera: Ichneumonidae)

• Published in: Neotropical entomology Vol. 49; no. 5; pp. 704 - 712
• Main Authors: Shimizu, S., Alvarado, M.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2020
• Subjects: Agriculture; Animals; Biomedical and Life Sciences; Ecosystem; Entomology; Female; Life Sciences; Male; Morphology and Physiology; Peru; Systematics; Wasps - anatomy & histology; Wasps - classification; Peru; Ophioniformes; Darwin wasps; parasitoid wasps; taxonomy; Neotropical; identification key
• ISSN: 1519-566X; 1678-8052
• DOI: 10.1007/s13744-020-00778-7

Nesomesochorinae is a rather small subfamily of Darwin wasps (Insecta: Hymenoptera: Ichneumonidae), only with three described genera. We recognize a fourth nesomesochorine genus from Perú and describe it as a new genus, Bina Shimizu & Alvarado gen. nov. The new genus is distinguished from previously described genera of Nesomesochorinae by the following combination of character states: mandible parallel-sided proximally and abruptly strongly narrowed ventroapically so that its lower apical tooth is much smaller and sharper than upper tooth; propodeum with lateromedian longitudinal carinae between anterior and posterior transverse carinae developed on more than posterior 0.9 so that the area superomedia is more or less enclosed; thyridium of 2nd metasomal tergite sometimes very large; 1st metasomal tergite stout and arched; body highly shiny. Bina gen. nov. comprises two species also described as new to science: B. huayrurae Shimizu & Alvarado sp. nov. (type species of Bina gen. nov. ) and B. nigra Shimizu & Alvarado sp. nov. Identification keys to genera of Nesomesochorinae and to species of Bina gen. nov. are provided.