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Table 1 Summary of estimates of parasitoid to host (P:H) ratios for four host insect genera

From: Quantifying the unquantifiable: why Hymenoptera, not Coleoptera, is the most speciose animal order

Focal host genus # NAm species (# with parasitoid records) P:H (overall) P:H (genus-specialists only) P:H (specialist) [including possible genus-specialists] Genus-specialist families
Rhagoletis (Diptera: Tephritidae) 24 (16) 2.44 1.31 1.50 Braconidae; Diapriidae; Pteromalidae
Malacosoma (Lepidoptera: Lasiocampidae) 6 (6) 13.00 1.00 1.83 Braconidae; Eulophidae; Ichneumonidae; Platygastridae
Dendroctonus (Coleoptera: Curculionidae) 14 (8) 6.50 1.13 1.38 Braconidae; Ichneumonidae; Gasteruptiidae; Proctotrupidae; Pteromalidae; Platygastridae
Neodiprion (Hymenoptera: Diprionidae) 33 (21) 3.48 0.95 1.29 Ichneumonidae; Chrysididae
  1. Shown for each host genus are: the total number of North American (NAm) species, as well as the number with parasitoid records; the overall P:H, which includes generalist species; the genus-specialist P:H; and the genus-specialist P:H when “possible genus-specialists” were included. Parasitoid families that were among each group of genus-specialists are also listed