DIAGNOSIS: Recognized among species of Ectrichodiella by the large subapical spine on the scape (fig. 4D), ocelli large and on shared elevation (fig. 4C), without apical dilation of foretibia, proximal portion of M+Cu separated (fig. 10C, D), pterostigma strongly inflated (fig. 10C, D), posterior margin of tergum 7 slightly rounded (fig. 11C), sternum 8 posterior margin straight (fig. 13P), and pygophore posterior margin round (fig. 13O, P).
DESCRIPTION: MALE: Macropterous, small body size. Measurements of holotype (in mm): habitus length from clypeus to abdominal margin: 3.31; head length excluding neck: 0.41; head greatest width: 0.62; synthlipsis width: 0.34; eye: 0.12; labial segment 2 (1st visible): unknown; labial segment 3 (2nd visible): unknown; thorax length: 1.04; anterior pronotal lobe greatest length: 0.16; anterior pronotal lobe greatest width: 0.59; posterior pronotal lobe greatest length: 0.35; posterior pronotal lobe greatest width: 1.0; abdomen length: 1.77; abdomen greatest width: 1.26. COLORATION: Body brown; ocellus pale; antennal setation dark; thorax dark brown, with posterior pronotal lobe brown; legs dark; hemelytron with corium uniformly brown, with veins uniformly brown; connexivum uniformly dark brown.
VESTITURE: Head fairly densely covered with short, curved setae; antennal setae less than 2× diameter of antennal segment; pronotum with short dark setae; scutellum with short setae densely lining lateral margins; small tubercles on hind trochanter not observable; connexivum with dark setae ventrally. STRUCTURE: HEAD: As in generic description, with interocular sulcus distinct throughout; with paired hemispherical elevations anterior of interocular sulcus; synthlipsis 2× eye width (fig. 2C); eye large, reaching ventral head margin; oval in lateral view, hemispherical in ventral view; ocelli large, on shared elevation (fig. 2C). Antenna: as in generic description, with scape with large subapical spine (fig. 4D). Labium: as in generic description, relative length of second and third segments not observable. THORAX: As in generic description, with surface slightly granulose; anterior pronotal lobe more than half length of and more than half width of posterior pronotal lobe, with anterior margin rounded, with median longitudinal depression, with paired, rounded processes on disc, but without glabrous areas posterior to processes; posterior pronotal lobe with lateral ridges (fig. 7C); midlateral scutellar projections large, mostly horizontal. Legs: as in generic description, without dilation apically on foretibia apically; ventroapical projections of forefemur and foretibial comb not observable (fig. 9D). Hemelytron: as in generic description, with distal margin of CuA1 cell fairly straight (fig. 10D), proximal portion of M+Cu separated, and pterostigma strongly inflated (fig. 10C). ABDOMEN: Lateral margin of laterotergite 1+2 slightly expanded; posterior margin of tergum 7 slightly rounded (fig. 11D); posterior margin of sternum 8 straight. Genitalia: pygophore with rounded lateral margins (fig. 13O, P), ventral surface without distinct setation and ridges along midline (fig. 13P), posterior margin of pygophore distinctly rounded (fig. 13H). Aedeagus not observed.
FEMALE: Unknown.
ETYMOLOGY: The species name is the feminine form of the Neo-Latin adjective electricus meaning “of amber” and referring to the type of fossilization.
DISTRIBUTION: Dominican Republic, Dominican amber.
DISCUSSION: Ectrichodiella electrina is unambiguously classified as part of Ectrichodiella shown by the morphology-based phylogenetic analysis in this study. Ectrichodiella electrina was recovered as sister taxon to either E. minima and E. rafaeli or the clade formed by E. caballina, E. nouraguensis, and E. obscura. Ectrichodiella electrina is unique among species of Ectrichodiella in the absence of the apical dilation of the foretibia and the pygophore posterior margin being round. While this specimen is excellently preserved, certain features are difficult to observe (e.g., the head in lateral view) or document (e.g., details of the labium; wing slightly twisted). Overall, the documentation of morphological features is sufficient to place this species in the genus Ectrichodiella and to distinguish it from all other known congeners.
HOLOTYPE: Male: Dominican Republic; Dominican Amber specimen, Oligo-Miocene (AMNH _DR-14-405) (AMNH).