Archaeognoriste primitiva†
Male. Head: Posterior surface flat, with scattered setulae. Frons membranous. Eyes large, hairy. Ocelli not seen. Scape and pedicel slightly wider than flagellomeres, subconical. Flagellum 14-segmented, flagellomeres cylindrical, width about equal to length. Palpi 3-segmented, segments cylindrical. Penultimate segment about 0.75x the length of apical one and 2x the length of antepenultimate.
Thorax: Scutum irregularly covered with short setae and bearing long lateral and acrostichal setae. Scutellum with two pairs of long setae and several short ones. Antepronotum and preepisternum with 6–8 long setae. Anepisternal suture declines posteriorly. Anepisternum with small cleft. Mediotergite setose, laterotergites bare. Dorsal edge of mesepimeron protruding toward laterotergite. Metepisternum with deep cleft, height more than width.
Wing membrane without macrotrichia. C not reaching wing tip, ends one-fourth distance between tips of R5 and M1. All veins bear setae. Sc very short, free. R1 about 0.6x the length of wing. RS base distinct, at the level of Sc tip. Crossvein r-m fused with tb, oblique. Stem of M and base of M1 and M2 fork absent. M3+4 base very weak. M and CuA vein sweak.
Legs: Fore coxae densely setose, mid and hind coxae with setae on apical half, all coxae about equal in size. Tibial and tarsal trichia not in rows.
Abdomen setose, with exception of 1st and 2nd sternites. Seventh sternite short, 8th small and retractable. Ninth tergite small, rectangular, with well-developed, short, one-segmented cerci apically. Gonocoxites straight. Gonostyli saberlike, thinner toapex, with one apical and one very long curved basal processes.
Body length = 1.58 mm (holotype)/1.47–1.61 mm (paratypes); wing length 5 0.98/0.95–1.10 mm.