(This version NOT as presented in 2005. Revised (in red) by the author in December 2017 to reflect other findings and updated nomenclature)
Diversity of gall wasps (Hymenoptera: Cynipidae) on bur oak (Quercus macrocarpa Michx.) in Riding Mountain National Park, MB Map published by AAA
Scott C. Digweed Edmonton, Alberta, Canada;
[email protected] During 3 visits (29 April - 1 May, 24 - 26 June, and 29 - 30 August 2004) to several bur oak stands on the eastern edge of Riding Mountain National Park, galls of 18 cynipid species were found on above-ground parts of bur oak. The park is near the northern limit of the natural range of bur oak, but this survey showed that most of the 25 gall wasp species recorded from bur oak occur in the park. Galls of most cynipid species hosted guests or parasitoids from the following genera: • Synergus spp. (Cynipidae: Synergini) • Ceroptres spp. (Cynipidae: Synergini) • Baryscapus sp. (Chalcidoidea: Eulophidae: Tetrastichinae) • Aprostocetus (Aprostocetus) sp. (Chalcidoidea: Eulophidae: Tetrastichinae) • Torymus sp. (Chalcidoidea: Torymidae) • Sycophila sp. (Chalcidoidea: Eurytomidae)
LANDSAT map of the distribution of bur oak in Riding Mountain National Park, MB (from Wolfe and Kenkel 2000).
Andricus quercusfrondosus (Bassett) Agamic generation, autumn gall in bud
Sexual generation unknown
Andricus quercuspetiolicola (Bassett) Agamic generation unknown
Sexual generation, summer gall on leaf
• Eurytoma sp. (Chalcidoidea: Eurytomidae) • Ormyrus sp. (Chalcidoidea: Ormyridae) • Brasema sp. (Chalcidoidea: Eupelmidae) • Ptermomalidae sp. (Chalcidoidea) • Lasioptera sp. (Diptera: Cecidomyiidae)
Andricus quercusstrobilanus (Osten Sacken) Agamic generation, autumn gall on bud
Sexual generation unknown
Distribution of bur oak in North America (from Harms 2002).
Callirhytis flavipes (Gillette) Agamic generation, autumn gall in bark
1 cm
Thanks to D. Langor for temporal flexibility and poster printing assistance, and to W. Vanderschuit for help with permits, housing, and stand selection. This work was funded by M. Braun and the author.
Sexual generation, summer gall on leaf
Literature Cited:
1 mm
?
Wolfe, K., and N. Kenkel. 2000. Bur oak in Riding Mountain National Park. Final report, prepared for Heritage Canada, Parks. viii + 105 pp.
?
?
Harms, V. L. 2002. Bur oak – an uncommon native tree in Saskatchewan. Blue Jay 60: 87-92.
Neuroterus vescicula (Bassett) Agamic generation unknown
Callirhytis glandulus (Beutenmueller) Agamic generation, autumn gall in acorn cup
Sexual generation, spring gall on bud
Sexual generation unknown
1 cm
?
?
Callirhytis quercusfutilis (Osten Sacken)
Andricus ignotus (Bassett)
Agamic generation, autumn gall in bark at stem base or on root
Sexual generation, spring gall in shoot
Agamic generation, autumn gall on leaf
Sexual generation, summer gall on leaf Scale: 1 mm
Not detected
Andricus foliaformis Gillette Agamic generation unknown
Disholcaspis quercusmamma (Walsh and Riley)
Sexual generation, summer gall on leaf
Agamic generation, autumn gall on twig
Sexual generation, spring gall in bud
? Andricus dimorphus (Beutenmueller) Agamic generation, autumn gall on leaf
Neuroterus saltarius Weld
Sexual generation unknown
Agamic generation, autumn gall on leaf
Sexual generation unknown
1 cm
?
? Scale: 0.5 mm
Andricus chinquapin (Fitch) Agamic generation unknown
Phylloteras poculum (Osten Sacken) Agamic generation, autumn gall on leaf
Sexual generation, summer gall on leaf
Sexual generation, spring gall In bud / leaf / catkin
[]
? Scale: 0.5 mm
Acraspis villosa Gillette Agamic generation, autumn gall on leaf
Sexual generation, spring gall in bud scale
Acraspis macrocarpae Bassett Agamic generation, autumn gall on leaf
Sexual generation, spring gall in bud scale
Xanthoteras quercusforticorne (Walsh) Agamic generation, autumn gall on twig or leaf
Sexual generation unproven (possibly summer gall on root)
1 cm
?
Philonix fulvicollis Fitch Agamic generation, autumn gall on leaf 1 cm
Sexual generation, spring gall in bud
[]
Not detected but collected elsewhere in Manitoba by the author: Neuroterus vernus (sexual generation spring gall in bud / catkin) / Neuroterus niger (autumn gall in leaf), and Neuroterus floccosus (Bassett) (sexual generation spring integral leaf gall, agamic generation autumn fuzzy leaf gall)
