Guapinannus orbiculatus, sp. n.

(Figs 3, 7, 9)

Holotype. Male. PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 32m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090718) (FMNH).

Paratypes: PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 12m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00097813), 4♀ (UCR _ ENT 00097814 -UCR_ENT 00097817), 2 nymphs (UCR _ ENT 00097818, UCR_ENT 00097819) (FMNH) . Chiriqui: Near Nueva California W. of Finca Palo Santo, 8.5°N 82.41667°W, 1524 m, 10 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090796) (FMNH) .

Diagnosis: Recognized by the small mid-sized body length (1.26 mm), elongate body shape (Fig. 3), one-loop, relatively thick vesica with pointed tip, and short, slender, pointed anophoric process (black arrow) (Fig. 7).

Description: Male: Total body length 1.26 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.53 mm; greatest width across forewings 0.68 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly fairly broad; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 horse head-shaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, slender, with single lobe curved, tip pointed; right paramere curved, tapering, basal process broad; left paramere straight, tapering, basal process narrow.

Female: As in male and generic description.

Collecting method and microhabitat: Collected using Berlese and Winkler extraction from the cortex of a hollowed palm stump and from floor litter at base of a log and cut stump.

Etymology: Named for the rounded vesica after “orbiculatus” Latin for round.