Bassettia floridana (agamic)

Bassettia ligni (agamic)

Bassettia pallida (agamic)

Bassettia tenuana (agamic)

Bassettia weldi (agamic)

Callirhytis aquaticae (sexgen)

Zapatella ceropteroides (agamic)

Zapatella herberti (agamic)

Dryocosmus quercuscatesbaei (sexgen)

Bassettia ligni (sexgen)

Bassettia floridana Ashmead, 1887

Bassettia floridana Ashmead 1887
Dryophanta corrugis Bassett 1890 (synonymy)

Biology -- Only the asexual generation is known which induces galls at the base of the current year's growth on Q chapmanii. Also observed to oviposit into the buds of Q prinoides. Galls mature in October and adults emerge in March-April.

Distribution: CT, FL

Bassettia ligni Kinsey, 1922

Biology--Alternate asexual and sexual generations are known. The asexual generation induces integral leaf galls while the sexual generation stimulates stem galls on Q. douglasii, dumosa, and lobata. The adults of the sexual generation emerge from leaf galls during June to mid-July; the adults of the asexual generation emerge from the bark during mid-April.

Distribution--CA, OR

Bassettia pallida Ashmead, 1896

Biology--Only the asexual generation is known which induces stem galls with cells hidden under the bark of Q geminata and virginiana. Adults emerge in April in GA and in March in FL.

Distribution--GA, FL

Bassettia tenuana Weld, 1921

Biology--Only the asexual generation is known which induces stem galls mainly at the base of young sprouts, with larval cells hidden under the bark on Q fendleri (=Q. x pauciloba [gambelii x turbinella]). Adults emerge in April.

Distribution--NM

Bassettia weldi sp. n.

Biology--Only the asexual generation is known, which induces stem galls hidden under the bark of twigs on Q gambelii.

Distribution--AZ

Callirhytis aquaticae Ashmead, 1887

[transferred back from Bassettia to Callirhytis]

Biology--The only known female was cut from a "hard knotty swelling" gall on Q nigra in March. Such stem swelling-like galls are typical for Callirhytis species but are not typical of Bassettia.

Distribution--FL

Callirhytis ceropteroides Bassett, 1900

[transferred back from Bassettia to Callirhytis]

Biology--Only the asexual generation is known which induces stem galls on Q velutina. Adults emerge in July. 

Distribution--CT, WV

Callirhytis herberti Weld, 1926

[transferred from Bassettia to Callirhytis]

Biology--Only the asexual generation is known which induces stem galls on Q agrifolia, kelloggii, wislizeni. Adults emerge in May-June.

Distribution--CA

Callirhytis quercuscatesbaei Ashmead, 1881

[transferred from Bassettia to Callirhytis]

Biology--Only the sexual generation is known which induces small stem swelling-like galls on Q laevis. Adults emerge in April.

Distribution--FL

Review of the Nearctic gallwasp species of the genus Bassettia Ashmead, 1887, with description of new species (Hymenoptera: Cynipidae: Cynipini)