A New Genus and Two New Species of the Subfamily Nesomesochorinae Ashmead (Insecta: Hymenoptera: Ichneumonidae)
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SYSTEMATICS, MORPHOLOGY AND PHYSIOLOGY
A New Genus and Two New Species of the Subfamily Nesomesochorinae Ashmead (Insecta: Hymenoptera: Ichneumonidae) S SHIMIZU1,2,3 , M ALVARADO4,5 1
Lab of Insect Biodiversity and Ecosystem Science, Graduate School of Agricultural Science, Kôbe Univ, Kôbe, Hyôgo, Japan Dept of Life Sciences, The Natural History Museum, London, UK 3 Research Fellow (DC and Overseas Challenge Program for Young Researchers), Japan Society for the Promotion of Science (JSPS), Tôkyô, Japan 4 Depto de Entomología, Museo de Historia Natural, Univ Nacional Mayor de San Marcos, Lima 14, Peru 5 Bosque Llaqta, Huaraz, Peru 2
Keywords Darwin wasps, identification key, Neotropical, Ophioniformes, parasitoid wasps, taxonomy Correspondence S. Shimizu, Lab of Insect Biodiversity and Ecosystem Science, Graduate School of Agricultural Science, Kôbe Univ, Rokkôdaichô 1–1, Nada, Kôbe, Hyôgo,657– 8501 Japan; [email protected] Edited by Douglas Zeppelini – UEPB Received 27 February 2020 and accepted 13 April 2020 * Sociedade Entomológica do Brasil 2020
Abstract 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.
Introduction Nesomesochorinae is a rather small subfamily of Darwin wasps (Insecta: Hymenoptera: Ichneumonidae) (Klopfstein et al 2019) with only three genera (Chriodes Förster 1869, Klutiana Betrem 1932, and Nonnus Cresson 1874) and 60 described species (Yu et al 2016). Nesomesochorinae was placed in Campopleginae as the tribe Nonnini (e.g., Townes 1970). However, Miah and Bhuiya (2001) suggested that it does not belong in the Campopleginae, based on a cladistic analysis, and Quicke et al (2005) formally removed Chriodes, Klutiana, and Nonnus from the Campopleginae by proposing revised status (i.e., Nesomesochorinae for Chriodes and
Klutiana and Nonninae for Nonnus) based on molecular and morphology. Thereafter, Quicke et al (2009) synonymized Nonninae with Nesomesochorinae. The most recent phylogenetic study of Ichneumonidae was
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