Striatoandricus maesi n. comb.

Andricus maesi

[No image or description of the gall is given]

Hosts: Q. segoviensis Liebm., Q. glaucoides Mart. and Gal. and Q. obtusata Humb. and Bonpl. (section Quercus); also probably in Q. potosina Trel., Q. microphylla Née and Quercus nr rugosa (section Quercus, see remarks).

Distribution: Nicaragua, described from material collected in the cerro de Tisey (Estelí, Reserva Natural Tisey Estanzuela); México (Oaxaca) in this paper and probably also in the following states (see below): Jalisco, Michoacán, Puebla and Zacatecas. First record from México.

Remarks: Similar galls without any emergence were collected in Zacatecas (México): Mesa de San Gabriel (Q. potosina Trel.) and La Cumbre (Q. microphylla Née); also in Puebla (México): Camotepec (Q. obtusata); in Michoacán (México): Urapan (Quercus sp); and in Jalisco (México): Las Guayabas (Quercus nr rugosa).

Andricus maesi n. sp.

Gall (Fig. 4a-d). Attached to the branches of the oak. It appears as a mass of white wool pinkish (sometimes off-white, never yellow or brown), with brittle hair without being fragile. The appearance is oval. The size ranges from 2-2.5 cm in diameter, and can reach 4 cm in length. The pubescence covers the central nucleus, forming a layer 1 cm thick. The polythalamous core forms a rosette of individual galls, dense and hard, inserted directly into the branch. Each gall presents a triangular aspect in longitudinal section; the basal part is narrower and is where it is attached to the branch; the apex is wider, the pubescent tuft protrudes and that's where the adult comes out. The larval chamber (2x1 mm) is surrounded by a thick wall that presents a pubescence that is long in the apical area and much shorter on the sides.

Host. Q. segoviensis Liebm. (subgen. Quercus, section Quercus), called 'acorn oak', is a white oak distributed in Nicaragua, Honduras, Guatemala and Mexico (Chiapas), between 650 and 2000 m altitude.

DISTRIBUTION. Collected only in Tisey hill (Nicaragua).