RT Journal Article T1 Terminal-instar larval systematics and biology of west European species of Ormyridae associated with insect galls (Hymenoptera, Chalcidoidea) A1 Gómez Sánchez, José Francisco A1 Hernández Nieves, María A1 Gayubo, Severiano F. A1 Nieves-Aldrey, José Luis AB A systematic study of the genus Ormyrus (Chalcidoidea, Ormyridae) was conducted based on the morphology and biology of the terminal-instar larvae of ten west European species that are parasitoids of gall wasps and gallflies of the families Cynipidae, Eurytomidae and Tephritidae. The first detailed descriptions are provided of the terminal-instar larvae of these ten species using SEMimages to illustrate diagnostic characters with systematic values. A key is provided for the identification of ormyrid larvae associated with galls in Europe, which is based particularly on characters of the head, mouthparts and mandibles. Although only limited informative variation in body shape was found, the setation of the head provided several characters of potential taxonomic value. The larval biology of the ten ormyrid species inhabiting different galls is also summarised. Although Ormyrus larvae are usually solitary idiobiont ectoparasitoids of the host larva of various gall-inhabiting insects, evidence of secondary phytophagy was observed in some species. PB Pensoft Publishers SN 1313-2989, ESSN: 1313-2970 YR 2017 FD 2017-01 LK https://hdl.handle.net/20.500.14352/18312 UL https://hdl.handle.net/20.500.14352/18312 LA eng NO Ministerio de Educación y Ciencia (MEC) NO Ministerio de Economía y Competitividad (MINECO)/FEDER DS Docta Complutense RD 17 abr 2025