Trigonaspis nitellina, n. comb.

Biorhiza nitellina

Trigonaspis? nitellina (Kinsey), incertae sedis

Biorhiza nitellina Kinsey
Trigonaspis zinzala (Kinsey) [A mistake? Sphaeroteras zinzala is listed separately as a valid species in this paper, and this synonymy was not made in the referenced paper]

[The galls of the two Mexican species considered "incertae sedies" (T innocens and T nitellina) produce identical galls to those of Sphaeroteras.]

Biorhiza nitellina, n. sp.
Agamic form

Gall. — Similar to that of eburnea (Bassett), Individual galls quite regularly hemispherical, flattened on bottom, usually not distorted except for some flattening where two calls press together; usually scattered, not particularly clustered, chiefly on leaves,

Host. — Quercus repanda [unclear if this refers to modern Q repanda or Q microphylla], the lowest dwarf oak of the area.

Range. — Hidalgo: Jacala, 24 SW, 6800' Probably restricted to dwarf white oaks in more northern Hidalgo and immediately adjacent portions of other Mexican states

Life History. — Adults: December 30. January 2, 8, k 16. February 25. Most of the emergence in the first half of January.