A new host of a parasitoid wasp, and an illustrated key for the species of Heteroschema (Hymenoptera: Chalcidoidea: Pteromalidae)

Abstract

We register the species Heteroschema rugosopunctata for the first time as a parasitoid of pupae of the fly of the pigeon pea Melanagromyza obtusa (March, 1914) (Diptera: Agromyzidae). In this study, we first offer the nomenclatural history of the genus Heteroschema Gahan and then provide our finds. In September 2014 and March 2016, we conducted two field trips to the Colombian Amazon region, South America, where we collected pods of Flemingia macrophylla (Willd.) Merrill. (Fabaceae) containing pupae of the fly, which, in turn, were parasitized. We took the samples to the lab and reared the individuals to the emergence of the wasps. Identification of the specimens was carried out using several morphological tools. Through employing macro-photographs of the type specimens from museums and those collected in this study, we also developed an illustrated key to distinguishing the species currently known in the genus.