Trichoteras rotundula Weld

Quercus chrysolepis
Leaf galls, separable from leaf intact
Fig 91. On under side on midrib. Larval cell supported by fibers. Short pubescence on surface wears off. Mono.

91. Q chrysolepis. A midrib cluster on under side of leaf in fall, dropping when mature, the larval cell supported by branching fibers. Green with short pubescence when young, later bare, smooth, ten. Adults were cut out November 1 (Idyllwild).

Trichoteras rotundula Weld

Quercus wilcoxii [chrysolepis]
Leaf galls
Detachable
Fig 78.

Trichoteras rotundula, new species

Host. — Quercus chrysolepis.

Gall (pl. 16, fig. 2). — A midrib cluster of a few globular galls, usually on the under side of a leaf in the fall. Covered with short straight hairs when young and green, later bare, smooth, tan, up to 2.7 mm. in diameter with a central cell 1.5 by 1.2 mm. supported by stout radiating fibers.

Habitat. — The type emerged in November from a gall collected at Camp Baldy, Calif., on November 7, 1939. One paratype was cut out September 5, 1918, from a gall collected at Los Gatos. Another was cut out November 10, 1949, from a gall collected at Idyllwild on November 6, 1948. One (not in the type series and all amber) was cut out dead in 1946 from a gall collected on Mount St. Helena in August 1922.

Trichoteras rotundula
(Andricus rotundula)*
Little-urn-gall wasp

Hosts: Quercus chrysolepis, palmeri

This cynipid wasp induces small, urn-shaped, monothalamous galls along the ventral midrib of leaves of canyon live and Palmer's oaks.

unisexual