TY - JOUR A1 - Kurczewski, Frank E. A1 - Abela, Alice J. A1 - Shimizu, Akira T1 - Chalcochares hirsutifemur (Banks) (Hymenoptera: Pompilidae: Pompilinae), a probable obligate parasitoid of Aptostichus Simon (Araneae: Mygalomorphae: Euctenizidae) in California T2 - Insecta Mundi N2 - Size equivalence, seasonal synchronicity, geospatial sympatry, habitat specificity, and host-searching behavior implicate the spider wasp Chalcochares hirsutifemur (Banks) (Hymenoptera: Pompilidae: Pompilinae) as an obligate parasitoid on species of the wafer-lid spider genus Aptostichus Simon (Araneae: Mygalomorphae: Euctenizidae) on coastal sandy back dunes in San Luis Obispo and Santa Barbara counties, CA. This is substantiated by 2010–2022 macrophotographs, videos, and field observations. Such host evidence supports recent unpublished phylogenomic studies that place Chalcochares as a sister genus of the spider wasp tribe Aporini, in which all species are known obligate parasitoids on trapdoor spiders and related Mygalomorphae. Chalcochares hirsutifemur and C. engleharti (Banks) are separated based on morphological, geographic, and probable host spider differences. Resource partitioning on the coastal sand dunes between C. hirsutifemur and three species of smaller Aporus Spinola is proposed. ZooBank registration. urn:lsid:zoobank.org:pub:8F9A67EF-E272-4B7B-BD42-2AC9FD9CBE7B T3 - Insecta Mundi - 1004 KW - Chalcochares engleharti KW - Aporus hirsutus KW - Aporus luxus KW - Aptostichus atomarius KW - Aptostichus simus KW - resource partitioning Y1 - 2023 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71101 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-711018 UR - https://centerforsystematicentomology.org/insectamundi/1004_Kurczewski_etal_2023.pdf SN - 1942-1354 SN - 0749-6737 VL - 2023 IS - article 1004 SP - 1 EP - 13 PB - Flora & Fauna Publ. CY - Gainesville, Fla. ER -