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Issue: Vol. 5601 No. 2: 7 Mar. 2025
Type: Article
Published: 2025-03-07
DOI: 10.11646/zootaxa.5601.2.3
Page range: 265-287
Abstract views: 156
PDF downloaded: 11

Two new species of Ormyrus Westwood (Hymenoptera: Ormyridae) from Cynipidae (Hymenoptera) galls on Silphium L. (Asteraceae: Heliantheae)

Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802
Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802
Department of Biology; Chowan University; 1 University Place; Murfreesboro; NC; USA; 27855
Department of Plant Pathology; The Ohio State University; 1680 Madison Ave; Wooster; OH; USA; 44691
Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802; Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802
Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802
Department of Entomology; The Pennsylvania State University; 501 Agricultural Science & Industries Building; University Park; PA; USA; 16802
Hymenoptera Aulacideini herb gall wasp Ormyrinae parasitoid taxonomy

Abstract

Two new species of Ormyrus Westwood, 1832 (Hymenoptera: Chalcidoidea: Ormyridae) are described: Ormyrus myrae Nastasi, Alcorn, & Davis sp. nov. and Ormyrus bellbowl Nastasi, Alcorn, & Davis sp. nov. Species of Ormyrus are parasitoids in insect galls, especially those induced by Cynipidae (Hymenoptera: Cynipoidea), and the new species are parasitoids in galls induced by Antistrophus Walsh, 1869 (Cynipidae: Aulacideini) on rosinweeds of the genus Silphium L. (Asteraceae: Heliantheae). Ormyrus bellbowl is a parasitoid of Antistrophus meganae Tooker & Hanks, 2004 in stems of S. terebinthinaceum Jacq., as well as other species of Antistrophus inducing inconspicuous galls in stems of S. laciniatum L. Ormyrus myrae is a parasitoid of Antistrophus laciniatus Gillette, 1891 on S. laciniatum and S. terebinthinaceum; the latter represents a new association of A. laciniatus with S. terebinthinaceum. Previous records of O. labotus Walker, 1843 in association with Antistrophus species are suggested as the results of misidentifications.

 

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