Aphelonyx persica Melika, Stone, Sadeghi & Pujade-Villar, 2004

Shachar, Einat, Melika, George, Inbar, Moshe & Dorchin, Netta, 2018, The oak gall wasps of Israel (Hymenoptera, Cynipidae, Cynipini) - diversity, distribution and life history, Zootaxa 4521 (4), pp. 451-498 : 470

Aphelonyx persica Melika, Stone, Sadeghi & Pujade-Villar, 2004

Host plants. Israel: Q. ithaburensis and Q. libani . Elsewhere: Q. libani , Q. brantii , Q. castaneifolia .

Life history. Known only from the bud galls of the asexual generation, which are spherical, single-chambered, 10–14 mm in diameter, with velvety, sometimes slightly wrinkled surface, broadly attached to the branch or sometimes to the trunk ( Fig. 37 ), often in clusters of 5–8. The gall contains an internal ovoid chamber that is attached to the inside wall in young galls but detaches from it and rolls freely inside the mature gall ( Fig. 38 ). Young galls are light green, turning brown when mature. Old galls remain on the trees for several years.

Phenology. Galls appear in August and adults emerge from them in October-November. In the present study one adult emerged from a gall on Q. libani in January.

Distribution. Israel: Common on Q. ithaburensis throughout its distribution range; on Q. libani found only on Mt. Hermon at 1780 m.a.s.l. Elsewhere: Turkey, Syria, Lebanon, Iran.

Comments. Galls of A. persica are very similar to those of A. cerricola and A. kordestanica but these species have not been found in Israel. The galls are often invaded by the inquiline Synergus variabilis Mayr , especially on Q. ithaburensis . An invaded gall is bigger, irregularly shaped and multichambered ( Figs 39–40 ), whereas an uninvaded gall is spherical and single-chambered ( Figs 37–38 ). Sternlicht (1968b) listed the axesual generation of Andricus kollari Hartig as occurring in Israel (his Figs 18–20 ) but we never found this species in Israel and conclude that Sternlicht mistook its galls for those of Aphelonyx persica . Galls of the two species are somewhat similar in shape and colour but those of A. kollari develop only on oaks from section Quercus .

Figures

FIGURES 35–40. Galls on Quercus boissieri and Q. ithaburensis. 35. Neuroterus quercsbaccarum, asexual generation on Quercus boissieri; 36. Neuroterus quercsbaccarum (A) and Neuroterus numismalis (B), asexual generations on Q. boissieri; 37. Aphelonyx persica, asexual generation on Quercus ithaburensis; 38. Aphelonyx persica, asexual generation on Quercus ithaburensis, gall dissected to show inner chamber; 39. Aphelonyx persica gall ivaded by the inquiline Synergus variabilis on Quercus ithaburensis; 40. Same, old gall with emergence holes of inquilines.

FIGURES 17–22. Galls on Quercus boissieri. 17. Andricus coriariformis, asexual generation; 18. Andricus moreae, asexual generation; 19. Andricus sp. 1, asexual generation; 20. Andricus sternlichti, asexual generation; 21. Andricus megatruncicolus, asexual generation; 22. Biorhiza pallida, sexual generation.