Striatoandricus barriosi (agamic)

Andricus barriosi, n. sp.

Gall (Figs. 4 A–D). Galls present as dense, spherical masses covered with light brown hairs on the midrib of leaves (Fig 4A and B) [the figures show the galls on the lower side of the leaf]. The gall is first orange, becoming dark brown when mature (Fig. 4C). Diameter measures 2.09 to 2.16 cm. The majority of galls are solitary and develop indistinctly on the upper or lower surface of the leaf blade. The internal structure of the gall shows a highly lignified core enclosing several larval cells (Fig. 4D and E)

Distribution. Andricus  barriosi  was  found  between  1,000–2,070  m  asl  at  Volcán  Barú  and  Alto  Quiel,  Chiriquí Province, Panama.

Biology. Only  the  asexual  generation  of  A.  barriosi  is  known,  which  induces  galls  on  leaves  of  Quercus bumelioides Liebm. and Q. insignis M. Martens & Galeotti (Fagaceae, sect. Quercus). The galls are found between December and May, during the dry season, when new leaves of Q. bumelioides and Q. insignis begin to emerge. The adult insects emerge from mature galls from June to July.

Andricus barriosi: a new species of oak gall wasp (Hymenoptera: Cynipidae: Cynipini) from Panama