TL;DR: DNA barcoded 2,597 parasitoid wasps belonging to 6 microgastrine braconid genera reared from parapatric tropical dry forest, cloud forest, and rain forest in northwestern Costa Rica and combined these data with records of caterpillar hosts and morphological analyses to result in a much more fine-scaled understanding of Parasitoid diversity and host specificity.
Abstract: We DNA barcoded 2,597 parasitoid wasps belonging to 6 microgastrine braconid genera reared from parapatric tropical dry forest, cloud forest, and rain forest in Area de Conservacion Guanacaste (ACG) in northwestern Costa Rica and combined these data with records of caterpillar hosts and morphological analyses. We asked whether barcoding and morphology discover the same provisional species and whether the biological entities revealed by our analysis are congruent with wasp host specificity. Morphological analysis revealed 171 provisional species, but barcoding exposed an additional 142 provisional species; 95% of the total is likely to be undescribed. These 313 provisional species are extraordinarily host specific; more than 90% attack only 1 or 2 species of caterpillars out of more than 3,500 species sampled. The most extreme case of overlooked diversity is the morphospecies Apanteles leucostigmus. This minute black wasp with a distinctive white wing stigma was thought to parasitize 32 species of ACG hesperiid caterpillars, but barcoding revealed 36 provisional species, each attacking one or a very few closely related species of caterpillars. When host records and/or within-ACG distributions suggested that DNA barcoding had missed a species-pair, or when provisional species were separated only by slight differences in their barcodes, we examined nuclear sequences to test hypotheses of presumptive species boundaries and to further probe host specificity. Our iterative process of combining morphological analysis, ecology, and DNA barcoding and reiteratively using specimens maintained in permanent collections has resulted in a much more fine-scaled understanding of parasitoid diversity and host specificity than any one of these elements could have produced on its own.
TL;DR: The subfamily Microgastrinae is redefined; Cardiochilinae and Miracinae are placed as separate subfamilies and Twenty new species are described and about 350 new combinations are given.
Abstract: The subfamily Microgastrinae is redefined; Cardiochilinae and Miracinae are placed as separate subfamilies. The Microgastrinae are divided into five tribes and 51 genera, 23 of which are new. The first two tribes, Apantelini and Microgastrini, have characteristically long ovipositor and are almost all solitary parasites of Microlepidoptera. The other three tribes, Forniciini, Cotesiini and Microplitini, have short ovipositor and are almost all parasites of Macrolepidoptera, usually gregarious. The genera Pseudapanteles, Parapanteles, Glyptapanteles and Protapanteles of Ashmead, Cotesia Cameron, Dolichogenidea and Diolcogaster Viereck are revived from synonymy, and the following new genera are described: Alphomelon, Choeras, Clarkinella, Deuterixys, Distatrix, Exix, Exoryza, Exulonyx, Iconella, Illidops, Nyereria, Papanteles, Paroplitis, Pelicope, Pholetesor, Rasivalva, Rhygoplitis, Sathon, Teremys, Venanides, Venanus, Wilkinsonellus, Xenogaster. Twenty new species are described and about 350 new combinations are given.
TL;DR: The numerous species described here, and an equal number already reared but not formally described, signal a far greater Glyptapanteles species richness in the Neotropics than suggested by the few described previously.
Abstract: The descriptive taxonomic study reported here is focused on Glyptapanteles, a species-rich genus of hymenopteran parasitoid wasps. The species were found within the framework of two independent long-term Neotropical caterpillar rearing projects: northwestern Costa Rica (Area de Conservacion Guanacaste, ACG) and eastern Andes, Ecuador (centered on Yanayacu Biological Station, YBS). One hundred thirty-six new species of Glyptapanteles Ashmead are described and all of them are authored by Arias-Penna. None of them was recorded in both countries; thus, 78 are from Costa Rica and the remaining 58 from Ecuador. Before this revision, the number of Neotropical described Glyptapanteles did not reach double digits. Reasonable boundaries among species were generated by integrating three datasets: Cytochrome Oxidase I (COI) gene sequencing data, natural history (host records), and external morphological characters. Each species description is accompanied by images and known geographical distribution. Characteristics such as shape, ornamentation, and location of spun Glyptapanteles cocoons were imaged as well. Host-parasitoid associations and food plants are also here published for the first time. A total of 88 species within 84 genera in 15 Lepidoptera families was encountered as hosts in the field. With respect to food plants, these wild-caught parasitized caterpillars were reared on leaves of 147 species within 118 genera in 60 families. The majority of Glyptapanteles species appeared to be relatively specialized on one family of Lepidoptera or even on some much lower level of taxonomic refinement. Those herbivores in turn are highly food-plant specialized, and once caterpillars were collected, early instars (1-3) yielded more parasitoids than later instars. Glyptapanteles jimmilleri Arias-Penna, sp. nov. is the first egg-larval parasitoid recorded within the genus, though there may be many more since such natural history requires a more focused collection of eggs. The rate of hyperparasitoidism within the genus was approximately 4% and was represented by Mesochorus spp. (Ichneumonidae). A single case of multiparasitoidism was reported, Copidosoma floridanum Ashmead (Encyrtidae) and Glyptapanteles ilarisaaksjarvi Arias-Penna, sp. nov. both parasitoid species emerged from the caterpillar of Noctuidae: Condica cupienta (Cramer). Bodyguard behavior was observed in two Glyptapanteles species: G. howelldalyi Arias-Penna, sp. nov. and G. paulhansoni Arias-Penna, sp. nov. A dichotomous key for all the new species is provided. The numerous species described here, and an equal number already reared but not formally described, signal a far greater Glyptapanteles species richness in the Neotropics than suggested by the few described previously.
TL;DR: Four species of Choeras Mason, 1981 (Braconidae: Microgastrinae) from Iran are revised; three are illustrated, of which one is described as new species from SE and W Iran: C. taftanensis Ghafouri Moghaddam van Achterberg sp.
Abstract: Sampling surveys were conducted in various regions of SE to West of Iran to collect the Microgastrinae specimens during 2013–2016. Reliable diagnostic morphological characters were used for comparing and identification of variable specimens. Four species of Choeras Mason, 1981 (Braconidae: Microgastrinae) from Iran are revised; three are illustrated, of which one is described as new species from SE and W Iran: C. taftanensis Ghafouri Moghaddam & van Achterberg sp. n. Occurrence of C. dorsalis in Egypt, Jordan and Malta, C . tedellae in Bulgaria and C . tiro in Israel and Spain are also first recorded.
TL;DR: A checklist of world species of Microgastrinae parasitoid wasps (Hymenoptera: Braconidae) is provided, with a total of 81 genera and 2,999 extant species recognized as valid, including 36 nominal species that are currently considered as species inquirendae.
Abstract: This is an open access article distributed under the terms of the CC0 Public Domain Dedication.
The attached file is the published pdf.