Xiphocentron (Antillotrichia) kamakan, Vilarino, Albane & Calor, Adolfo R., 2015

Vilarino, Albane & Calor, Adolfo R., 2015, New species of Xiphocentron Brauer 1870 (Trichoptera: Xiphocentronidae) from Northeastern Brazil, Zootaxa 3914 (1) : -

Xiphocentron (Antillotrichia) kamakan new species

Figs. 1 A–G, 2

Diagnosis. The new species resembles Xiphocentron (Antillotrichia) rhamnes Schmid 1982 , X. (Antillotrichia) serestus Schmid 1982 , and X. (Antillotrichia) mnesteus Schmid 1982 , for each of which Schmid described a shape discontinuity (twist) on the connection between the first and second articles of the inferior appendage (Schmid’s hypothesis of homology) instead of a linear continuity between the two segments. This character is also present in the new species, but the new species differs from these congeners by each inferior appendage having a sclerotized process bearing short spines on its basomesal margin and two spinulous regions on the ventral edge: One basal and one on the “elbow” formed by the shape discontinuity between the articles of each inferior appendage.

Description. Male adult. Length of each forewing 3.3–4.1 mm (n= 5). Overall color (in alcohol) nearly uniformly medium brown. Forewings covered with fine, short, and brown setae; middle of each forewing with small circular patch of white setae ( Fig. 2); forewings with forks 2 and 4; hind wings each with only fork 2 ( Fig. 1 B). Apical spur of each hind tibia not modified ( Fig. 1 A). Segment V bearing pair of anteroventral glands without external glandular processes.

Male genitalia. Tergum IX, in lateral view ( Fig. 1 E), subtriangular, wider basally, narrower and rounded apically; anterior margin sinuous, dorsal margin nearly straight; in dorsal view ( Fig. 1 C), subtrapezoidal, wider basally, narrower apically; anterior margin with deep, U-shaped, mesal emargination; posterior margin sinuous with slight mesal emargination. Sternum IX, lateral view ( Fig. 1 E), long, subtriangular, about 2 times as long as tall, taller basally, narrower and slightly pointed apically; anterior margin on each side with short, slender, rounded, mesal projection with small slender anterior flange; ventral margin rounded; posterodorsal margin on each side sinuous, slightly concave at midlength; in ventral view ( Fig. 1 D), obovate, anterior margin straight with short lateral projections; posterior margin rounded with shallow mesal emargination. Segment X semimembranous; in lateral view ( Fig. 1 E), oblong, apically bilobated, lobes rounded, single ventral lobe smaller than pair of dorsal lobes; in dorsal view ( Fig. 1 C), subtriangular, wider basally, narrower and divided apicodorsally into two rounded, dorsolateral lobes; in ventral view ( Fig. 1 D), ventral lobe acute posteromesally. Preanal appendages long, subcylindrical, setose; in lateral view ( Fig. 1 E), each slightly sinuous, widest basally and in posterior half, slender before middle giving general sinuous aspect with dorsal margin nearly straight and ventral margin concave, apex rounded; in dorsal view ( Fig. 1 C), nearly parallel-sided, slightly narrower preapically, basomesal margin with several straight setae. Inferior appendages about as long as preanal appendages, surfaces covered with fine setae; in lateral view ( Fig. 1 E), each sinuous, widest basally, with a strong shape discontinuity between the two articles of inferior appendage, its ventral margin with deep and rounded excision before middle, with undulated and spinulous elbow-like shape near middle, and with slender, clavate apical half; basomesal and midmesal ventral margins before and beyond excision darkly sclerotized and bearing short spines, mesal margin with sclerotized process bearing short spines; in dorsal and ventral views ( Figs. 1 C, 1D), angled mesad at one-third length, then straight. Aedeagus long, slender, tubular, with the apex slightly enlarged ( Fig. 1 G).

Holotype male (alcohol): BRAZIL: Bahia: Camacan, RPPN Serra Bonita, Córrego 3, Chuchuzeiro, 15º23’03”S, 039º34’00”W, iv.2011, Malaise trap, Calor A.R., Lecci L.S., Pinho L.C. & Moretto R. ( MZUSP).

Paratypes: BRAZIL: Bahia: same data as holotype, 1 male (alcohol) ( MZUSP); same data except, 15º23’28”S, 039º33’56”W, 820 m, 31.vii.2008, light UV/ white, Calor A.R., Lecci L.S., Pinho L.C. & Moretto R., 1 male (alcohol) ( MZUSP); same except, Córrego 1, atrás da caixa d’água, 15º23’26.6”S, 039º33’57.2”W, 26–27.xi.2011, UV Light Pan trap, 3 males (alcohol) ( UMSP); same except, Córrego 1, próximo ao Centro de Pesquisa, 15º23’28”S, 39º33’56”W, vii.2008, Malaise trap, 1 male (alcohol) ( UMSP); same except, Córrego 1, próximo ao Centro de Pesquisa, 15º23’28”S, 39º33’56”W, ix.2008, Malaise trap, 1 male (alcohol) ( UFBA); Elísio Medrado, Serra da Jibóia, Fazenda Jequitibá, GAMBA Reserve, Córrego Caranguejo, 12º52’21.5”S, 39º28’56.5”W, 07.xi.2010, Silva-Neto, A.M.G. & Araujo, M., 1 male (alcohol) ( UFBA); Varzedo, Serra da Jibóia, Fazenda Baixa Grande, Propriedade do Sr. Getulio, Riacho 2, 12 º57’45.3’’S, 39º27’13.1”W, 280 m, 09.ii.2014, UV Light Pan trap, Calor A.R. & Vilarino A., 1 male (alcohol) ( UFBA).

Etymology. Noun in apposition, with unchanging termination, in reference to the Kamakan people who were indigenous to the Camacan region where the holotype was collected.

Distribution. Brazil (BA).

Figures

FIGURE 1. Xiphocentron (Antillotrichia) kamakan Vilarino & Calor, new species, male. A—apex of left hind tibia and spurs and basitarsus; B—right wings, dorsal; C—genitalia, dorsal; D—genitalia, ventral; E—genitalia, left lateral; F—aedeagus apex, left lateral; G—aedeagus apex, dorsal.