Body slender, narrow, linear, small, length 1.0–1.7 mm; pubescence on pronotum and elytra directed laterad; head subquadrate with angular posterior tempora, as long and at least as wide as pronotum; eyes shorter than length of temples; antennomeres V-X strongly transverse and slightly incrassate apically, pronotum small, subquadrate or 1.2 times as wide as long, broadest subapically, pubescence directed anteriad and laterad from midline of disc; elytra short, at suture about as long as pronotum or slightly longer; abdomen subparallel. Male tergite VIII truncate apically; tubus of median lobe of aedeagus simple in form, its venter arcuate; internal sac structures inconspicuous; spermatheca small, capsule subspherical with small or without apical invagination, stem very short.

Body length 1.2–1.6 mm; body narrowly subparallel, linear, color variable: reddish brown with head and abdomen dark brown to piceous, or body piceous with reddish brown elytra, and yellowish-red legs, basal antennomeres and tip of abdomen; integument finely punctate; head subquadrate, larger than pronotum, with postocular area longer than diameter of eye, hind angles angular and rounded; antennomeres IV-X transverse and VI-X strongly transverse and about 3 times wider than long; pronotum broadest in apical third, narrow at base, pubescence directed laterad from midline of disc; elytra subparallel, at suture about as long as pronotum; abdomen subparallel, slightly broadening posterad. MALE: tergite VIII nearly two times as wide as long (Fig. 4); sternite VIII about one fourth wider than long (Fig. 5); median lobe of aedeagus with narrowly oval bulbus and subparallel tubus in dorsal view (Fig. 3); in lateral view tubus broadly arcuate ventrally, with apex narrow and rounded (Fig. 2). FEMALE: tergite VIII nearly two times as wide as long (Fig. 6); sternite VIII rounded apically (Fig. 7); spermatheca with large pitcher-shaped capsule and narrow apical invagination, stem very short (Fig. 8).

Origin: Nearctic. Canada: ON. USA: IA, IN, TX, VA.

Habitat: oak savanna from leaf, log, and grass litter. Collecting period: X. Collecting method: Berlese extraction of leaf, log, and grass litter. Live adults of this species were extremely slow-moving and the use of a Berlese funnel likely facilitated the capture of this minute beetle.

Thecturota capito Casey was recorded from Canada (ON) for the first time under a synonymic name T. pusio (Casey) by Brunke et al. (2012). Fenyes (1920) and Moore and Legner (1975) listed T. pusio, originally named as Oligurota pusioCasey 1893: 362, as a synonym of T. capitoCasey 1893: 358. We overlooked this fact in Brunke et al. 2012, and now it is corrected. In the original description, Casey also mentioned specimens from AZ (Tucson).

Body length 1.5–1.7 mm; body narrowly subparallel, linear, yellowish brown with head, most of antennae, and apical part of abdomen dark brown to piceous, or body light brown with darker head and posterior abdomen or pronotum and elytra brown and remainder of the body dark brown to almost black; integument finely punctate; head subquadrate, larger than pronotum, with postocular area longer than diameter of eye, hind angles angular and rounded; antennomeres IV-X transverse and VI-X strongly transverse and about 2 times wider than long; pronotum broadest in apical third, narrow at base, pubescence directed laterad from midline of disc; elytra subparallel, at suture slightly longer than pronotum; abdomen subparallel, slightly broadening posterad. MALE: tergite VIII nearly as wide as long (Fig. 11); sternite VIII about as wide as long (Fig. 12); median lobe of aedeagus with tubus arcuate ventrally and narrow at apex in lateral view (Fig. 10). FEMALE: tergite VIII subquadrate (Fig. 13); sternite VIII rounded apically and in some specimens slightly emarginate medially (Fig. 14); spermatheca with subspherical capsule and without apical invagination, stem very short and sinuate (Fig. 15).

Origin: Nearctic. Canada: ON, QC. USA: RI.

Habitat: unspecified forests. Collecting period: VII. Collecting method: car netting.

CANADA, Quebec: Oka, ~ 45.49°N, 74.01°W, 12.VII.2016, car netting, Tim Struyve (LFC, TSC) 1 male, 15 females; Saint-Joseph-du-Lac, ~ 45.53°N, 74.02°W, 11.VII.2016, car netting, Tim Struyve (LFC, TSC) 4 males, 1 female; Port Rowan, ~ 42.62°N, 80.53°W, car netting, Tim Struyve (LFC, TSC) 2 females. Ontario: Algonquin Provincial Park near Petawawa, ~ 45.87°N, 77.33°W, car netting, Tim Struyve (LFC, TSC) 1 male, 1 female.