Ectrichodiella caballina, n. sp.

Figures 1A–C, 2A, B, 4A, B, 6A, B, 7A, B, 9A, C, 10A, 11A, B, 13A–G

DIAGNOSIS. Recognized among species of Ectrichodiella by the large subapical spine on the scape (fig. 4B); eye in lateral view not reaching ventral head margin, about 0.5× height of head (fig. 2B); ocelli large and on paired elevations (fig. 2A); third labial segment 0.75× length of second (fig. 6A); large and strongly vertical midlateral scutellar projections (fig. 7B); proximal portion of M+Cu separated (fig. 10A), slightly inflated pterostigma (fig. 7A), yellow coloration on hemelytron largely restricted to proximal part of veins and narrow areas surrounding veins (fig. 10A); lateral margin of laterotergite 1+2 only slightly expanded (fig. 1A); posterior margin of tergum 7 indented (fig. 11A); posterior margin of sternum 8 slightly sinuous (fig. 13A), and pygophore ventrally without transverse ridges along midline.

DESCRIPTION. MALE: Macropterous, small body size. Measurements of holotype (in mm): habitus length from clypeus to abdominal margin: 3.74; head length excluding neck: 0.77; head greatest width: 0.98; synthlipsis width: 0.57; eye: 0.16; labial segment 2: 0.48; labial segment 3: 0.32; thorax length: 1.25; anterior pronotal lobe greatest length: 0.16; anterior pronotal lobe greatest width: 0.45; posterior pronotal lobe greatest length: 0.54; posterior pronotal lobe greatest width: 0.8; abdomen length: 1.97; abdomen greatest width: 1.84. COLORATION: Body brown; eye dark brown; ocellus pale; antennal setation light; thorax dark brown, with posterior pronotal lobe brown; legs yellow with brown band on femur; hemelytron with corium brown with yellow band proximally, with veins brown and yellow, yellow coloration on hemelytron largely restricted to proximal part of veins (fig. 10A) and distal margin of pterostigma; connexivum brown with contrasting yellow markings at sutures. VESTITURE: Head with sparse, thin, medium length yellow dorsally and with thin, short, white setae on ventral surface; labial setae thin, small, yellow; antennal setae less than 2× the diameter of antennal segment; thorax with sparse yellow, thin, medium length setae dorsally on anterior pronotal lobe and laterally on posterior lobe; scutellum with short yellowish setae densely lining lateral margins; small tubercles on hind trochanter; hemelytron with sparse, yellow, short, setae; connexivum with yellow short setae ventrally. STRUCTURE: HEAD: As in generic description, with interocular sulcus most pronounced at middle of head; synthlipsis 3× eye width (fig. 2A); with paired hemispherical elevations anterior of interocular sulcus; eye relatively large, height about 0.5× height of head (fig. 2B), reniform in lateral view, hemispherical in ventral view; ocelli large, on individual paired elevations. Antenna: as in generic description, with scape with large subapical spine (fig. 5B). Labium: as in generic description, with third segment 0.75× length of second (fig. 6A). THORAX: As in generic description, with surface smooth; anterior pronotal lobe less than half length and more than half width of posterior pronotal lobe, with anterior margin straight, with median longitudinal depression, with paired, rounded processes on disc (fig. 7B: alp) and paired glabrous areas on anterior pronotal lobe posterior to anterior lobe processes; posterior pronotal lobe with lateral ridges; midlateral scutellar projections large, strongly vertical (fig. 7B). Legs: as in generic description, with foretibia apically dilated (fig. 9A). Hemelytron: as in generic description, with distal margin of CuA1 cell fairly straight (fig. 10A), proximal portion of M+Cu separated (fig. 10A), and pterostigma slightly inflated. ABDOMEN: Lateral margin of laterotergite 1+2 slightly expanded; posterior margin of tergum 7 indented (fig. 11A); posterior margin of sternum 8 slightly sinuous (fig. 13A). Genitalia: pygophore with sinuous lateral margins (fig. 13A, B), ventral surface with distinct setation and ridges along midline (fig. 13A), posterior margin of pygophore slightly rounded (fig. 13H). Aedeagus as in figure 13E–G.

FEMALE: As in male, see table 1.

ETYMOLOGY: The species is named after the Montagnes des Chevaux (“ Horse Mountains ”) in French Guiana where the holotype was collected, after the feminine form of the Latin adjective caballinus, referring to a horse.

DISTRIBUTION: Only known from French Guiana.

DISCUSSION: Ectrichodiella caballina, E. nouraguensis, and E. obscura, closely resemble each other with respect to overall habitus, color pattern, lateral ridges on the posterior pronotal lobe and size and vertical orientation of the midlateral scutellar projections. E. caballina, E. nouraguensis, and E. obscura, can be distinguished from each other by the wing color pattern, and details of the male genitalia among other features.

HOLOTYPE: Male: French Guiana: Guyane: Montagnes des Chevaux; 31 Jan 2010, SEAG, (UCR _ ENT00127901) (MNMH).

PARATYPES: French Guiana: Guyane: Montagnes des Chevaux: 28 Feb 2010, SEAG, 1 Ƌ (UCR _ ENT00129410) (MNMH); 03 Jan 2010, SEAG, 1 Ƌ (UCR _ ENT00129411) (JMB); 21 Feb 2010, SEAG, 1 Ƌ (UCR _ ENT00129412) (UCR); 16 Jan 2009, SEAG, 1 Ƌ (UCR _ ENT00129413) (MNMH); 09 Feb 2010, SEAG, 1 Ƌ (UCR _ ENT00129414) (UCR), 1 Ƌ (UCR _ ENT00129417) (UCR); 28 Feb 2010, SEAG, 1 Ƌ (UCR _ ENT00129415) (UCR); 31 JAN 2010, SEAG, 1 Ƌ (UCR _ ENT00129416) (UCR); 24 Apr 2009; SEAG, 1 ♀ (UCR _ ENT00129418) (UCR). Nouragues: 06 Mar 2011, SEAG, 1 ♀ (UCR _ ENT00129404) (MNMH).