Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Megastigmus floridanus (Hymenoptera: Torymidae), newly discovered in Ilex seed (Aquifoliaceae).

Abstract

Megastigmus floridanus was discovered to be phytophagous in seeds of Ilex opaca and one of its hybrids with Ilex cassine. This is the first reports of a species of Megastigmus associated with Aquifoliaceae. A brief review of phytophagous wasps associated with Ilex seed is given, and adults and larvae of the two New World seed feeders (M. floridanus and Torymus rugglesi) are illustrated. Originally described from a single, unreared specimen from Florida, M. floridanus was rediscovered there, where it was reared from Ilex Ă— attenuata. It is newly reported from Maryland from an unknown cultivar of I. opaca. Here it was univoltine, overwintering as mature larvae in mature fruit. Adults emerged in May and June.