Belonocnema treatae is a species of gall wasp that forms galls on Quercus virginiana and very rarely Quercus geminata. There are both asexual and sexual generations. The asexual generation forms galls on the underside of leaves while the sexual generation form galls on the roots. This species can be found in the United States, where it is known from Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina.[1] It, along with the other described Belonocnema species, has been used to study speciation.[2]
| Belonocnema treatae | |
|---|---|
| |
| Asexual galls of Belonocnema treatae | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Cynipidae |
| Genus: | Belonocnema |
| Species: | B. treatae
|
| Binomial name | |
| Belonocnema treatae Ashmead, 1881
| |
| Synonyms | |
| |
Taxonomy and phylogenetics
editBelonocnema treatae was first described in 1881 by Gustav Leopold Mayr on the basis of sexual generation adults collected by noted naturalist Mary Treat. She collected the galls in Green Clove Spring, Florida, from root galls growing on Quercus virginiana.[1] Due to a printing error, the genus first appeared as Belenocnema until it was subsequently corrected.[3]
Later that same year, William Harris Ashmead described individuals from the same galls as Dryorhizoxenus floridanus, but later synonymized this name under Mayr's B. treatae in 1886.[1]
Genetic data places B. treatae as sister to B. fossoria.[1]
Description
editThe asexual generation galls are smooth, unilocular balls that appear on the ventral side of leaves. Young galls are orange or light brown and darken as they age. The sexual generation galls are irregular shaped, multilocular clusters of galls appearing on small rootlets.[1]
Belonocnema treatae can be distinguished from B. fossoria by the spur on the anterior side of fore tibia being shorter than the basitarsus and tibial spurs in both generations. It can be separated from B. kinseyi in the sexual generation by weakly delimited scutellar foveae separated broadly by a ridge and a distinctive areolet in the asexual generation.[1]
Distribution and biology
editThe distribution of Belonocnema treatae generally follows that of its main host plant, Quercus virginiana. However, a species turnover occurs in southeast Mississippi, where B. kinseyi replaces B. treatae for the remaining western range of Q. virginiana.[1]
Sexual-generation adults emerge from mid-March to end of April, corresponding with the timing of the leaf flush of Q. virginiana.[1]
References
edit- ^ a b c d e f g h Zhang, Y Miles; Egan, Scott P; Driscoe, Amanda L; Ott, James R (2021-02-27). "One hundred and sixty years of taxonomic confusion resolved:Belonocnema(Hymenoptera: Cynipidae: Cynipini) gall wasps associated with live oaks in the USA". Zoological Journal of the Linnean Society. 193 (4): 1234–1255. doi:10.1093/zoolinnean/zlab001. ISSN 0024-4082.
- ^ Zhang, Linyi; Hood, Glen Ray; Ott, James R; Egan, Scott P (2024-01-06). "The role of divergent host use and geography in the evolution of habitat isolation and sexual isolation among sister species of Belonocnema gall wasps". Journal of Evolutionary Biology. 37 (2): 248–255. doi:10.1093/jeb/voae005. ISSN 1420-9101.
- ^ Melika, G.; Bechtold, M. (2001). "Taxonomic notes and type designations of gall inducing cynipid wasps described by G. Mayr (Insecta: Hymenoptera: Cynipidae)". Annalen des Naturhistorischen Museums in Wien. Serie B für Botanik und Zoologie. 103: 327–339. ISSN 0255-0105.