SEM micrographs of genitalic segments in Petrobiellus akkesiensis female, anterior to the top. A Venter of the abdominal segments VIII and IX, ventral view. B Enlargement of the basal part of the ovipositor, ventral view. C Enlargement of the distal part of the ovipositor, ventral view. D Venter of the abdominal segments VIII and IX, dorsal view. E Enlargement of the basal part of the ovipositor, dorsal view. F Enlargement of the distal part of the ovipositor (gonapophyses of right side only), dorsal view. — Abbreviations: Cx8, 9 – coxites VIII and IX; Gp8, 9 – gonapophyses VIII and IX; Ov – ovipositor; St8, 9 – styli VIII and IX. — Scale bars: A, D – 1 mm; B, C, E – 200 µm; F – 100 µm.

 
 
  Part of: Mtow S, Machida R (2025) Mating behavior of the jumping bristletail Petrobiellus akkesiensis (Archaeognatha: Machilidae: Petrobiellinae): Direct spermatophore transfer via genital coupling. Arthropod Systematics & Phylogeny 83: 737-756. https://doi.org/10.3897/asp.83.e159694