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The oak marble gall is frequently conflated with the oak apple gall, caused by another gall wasp, Biorhiza pallida. Oak marble galls are also known as the bullet gall, oak nut or Devonshire gall. [5] The developing spherical galls are green at first, brown later, and mature in August. Each gall contains a central chamber, with a single female ...
Cynipini is a tribe of gall wasps. These insects induce galls in plants of the beech and oak family, Fagaceae. [1] They are known commonly as the oak gall wasps. [2] It is the largest cynipid tribe, with about 936 [3] to 1000 [2] recognized species, most of which are associated with oaks. [2] The tribe is mainly native to the Holarctic. [3]
Galls (upper left and right) formed on acorns on the branch of a pedunculate (or English) oak tree by the parthenogenetic generation Andricus quercuscalicis.. The large 2 cm gall growth appears as a mass of green to yellowish-green, ridged, and at first sticky plant tissue on the bud of the oak, that breaks out as the gall between the cup and the acorn.
Jumping oak galls are caused by a very tiny, native, stingless wasp (Neuroterus sp.) which lays eggs in leaf buds. As the leaf develops, pinhead-sized galls, also referred to as abnormal plant ...
Amphibolips quercuspomiformis, also known as the apple gall wasp or live oak apple gall wasp, is a species of gall wasp. It induces galls in coast live oak and interior live oak trees. Like many gall wasps, it has two alternating generations which induce differing galls: an all-female parthenogenic generation, and a bisexual generation. The ...
The reproduction of gall wasps is usually partly parthenogenesis, in which a male is completely unnecessary, and partly two-sex propagation. [2] Most species have alternating generations, with one two-sex generation and one parthenogenic generation annually, whereas some species produce very few males and reproduce only by parthenogenesis, [2] possibly because of infection of the females ...
Cola-nut gall cut open to show the unilocular cavity Oak marble galls showing two stunted and two normal-sized examples. The galls are found in small groups, which however do not coalesce, helping to prevent mis-identification with the oak marble gall (Andricus kollari), in addition the shape is ovoid rather than spherical and it is scaly rather than smooth.
Atrusca brevipennata, formerly Andricus pellucidus, also known as the little oak-apple gall wasp, is a locally common species of cynipid wasp that produces galls on oak trees in North America. [1] The wasp oviposits on shrub live oak and Gambel oak leaves. [1] The larval chamber is at the center of the gall, connected to the husk by slender ...