Ochrotrichia buenoi Razo-González, 2018

Razo-González, María, 2018, Caddisflies (Insecta: Trichoptera) from Santa Catarina Lachatao, Oaxaca, México: New species, new geographical records, and checklist, Zootaxa 4388 (1) : -

Ochrotrichia buenoi Razo-González , n. sp.

( Figs. 5A–5C )

Diagnosis. Ochrotrichia buenoi appears to be closely related to O. canicula Bueno-Soria 2009 on the basis of the elongate shape of the inferior appendages and a long lateral spine on the left side of segment X. However, it is distinguished from that species by the presence of a tiny spine-like process on the right side of segment X, in dorsal view, and by a combination of characters of the inferior appendages not observed in O. canicula . Ochrotrichia buenoi is distinguished by the different asymmetry of the inferior appendages, both in dorsal and in lateral views: Unlike O. canicula , O. buenoi has a large midventral lobe on each appendage and several groups of peg-like spines with asymmetrical distribution.

Adult. Length of each male forewing 3 mm. Color dark brown (coloration in alcohol).

Male. Dorsal margin of segment IX, incomplete, fused with segment X. Segment X ( Fig. 5A ) complex with short basal process on left side (process “a”); short, stout, darkened spine slightly curved to right apically on right beside long middorsal digitiform process (process “b”); spine-like process on left side with darkened apex curved to left (process “c”); apical process with tip pointed and angled to left and with lightly sclerotized circular apicoventral membrane (process “d”); fifth process extending sinuously below previous ones and best seen in lateral views (process “e”). Inferior appendages, triangular and elongated, asymmetrical in both dorsal and lateral views, each tapering to pointed apex with black peg-like setae distributed irregularly on mesal surface; right appendage with small basoventral lobe terminated and several long setae on ventral margin ( Fig. 5B ); left appendage with two preapicoventral lobes, basoventral lobe smallest with long setae and midlength lobe broader and with small cluster of black peg-like setae ( Fig. 5C ). Phallus, long, thread-like.

Holotype male. MÉXICO: Oaxaca: Santa Catarina Lachatao, Las Vigas, 17°10’43”N, 96°26’51”W, 2689 m asl, 28.vi.2010, light trap, J.A. Casasola-González & M. Razo-González, 1 male (alcohol, CNIN-IBUNAM).

Paratype male. MÉXICO: Oaxaca: Santa Catarina Lachatao, Puente de los Trabajos, 17°15’11”N, 96°29’27”W, 1985 m asl, 12.xi.2015, light trap, V.S. Jiménez-Hernández, M.A. Patiño-Ruíz & M. Razo-González, 1 male (alcohol, CNIN-IBUNAM).

Etymology. This new species is named in honor of Dr. Joaquín Bueno-Soria as a gesture of appreciation for his invaluable friendship and collaboration, and in recognition of his outstanding contributions to the study of Trichoptera from México.

Distribution. MÉXICO: Oaxaca.

Figures

FIGURE 5. Ochrotrichia buenoi new species, male genitalia. 5A, dorsal; 5B, right lateral; 5C, left lateral. “a” = process “a”; “b” = process “b”; “c” = process “c”; “d” = process “d”; “e” = process “e”; IX = segment IX; X = segment X; ia = inferior appendage.