Ochrotrichia quasi, Bueno-Soria, Joaquin & Holzenthal, Ralph W., 2008

Bueno-Soria, Joaquin & Holzenthal, Ralph W., 2008, The genus Ochrotrichia Mosely (Trichoptera: Hydroptilidae) in Costa Rica, with the description of four new species, Zootaxa 1763, pp. 41-54 : 46-47

Ochrotrichia quasi , new species

Figs. 5 a, b, c

Based on the finger-like dorsal lobe of the inferior appendages, this is another species of the arranca group closely related to Ochrotrichia arranca (Mosely) and O. conformalis new species. However, the distribution of spines on the inferior appendage and small size of its ventral lobe, clearly separate O. quasi new species from O. arranca (Mosely) and O. conformalis new species.

Male: Length of forewing 2.0 mm. Color in alcohol stramineous. Segment IX depressed, slightly produced anteriad, with posterodorsal margin slightly produced. Segment X in dorsal view, with long, slightly curved, dorsal process, bearing 2 large black setae; in lateral view, left side with apically bifurcated process with acute apex. Inferior appendage with elongate, finger-like, dorsal lobe; on right side with strong spine-like process on base of dorsal lobe; left inferior appendage with elongate ventral lobe; between lobes dark apical spines-like of 2 different sizes; in ventral view, ventral lobe with pair of short, stout, preapical spine-like processes. Phallus long, thread-like.

Female: Unknown

Type material: Holotype, male. COSTA RICA: San José: Río Savegra, San Gerardo de Dota 9.33º N, 83.48º W, el. 2200 m, 9.viii.1995, C. Young ( CMC). Paratypes: Same data as the holotype but 9.viii.1995, 1 male ( NMNH), 4.iii.1995, 1male ( UMSP).

Etymology: Quasi is the Latin word meaning “appearing as if;” referring to the similarity of this species with O. conformalis new species and O. arranca (Mosely) .

Figures

FIGURE 5. Ochrotrichia quasi new species. Male genitalia. 5 a, ventral view. 5 b, left lateral view. 5 c, right lateral view.