Zorotypus (Octozoros) hirsutus Mashimo, sp. n.

(Figs. 1, 2)

Holotype: Alate female; Myanmar, Kachin State, Hukawng Valley (Kania et al. 2015: fig. 1; Jałoszyński et al. 2017: fig. 1); Albian-Cenomanian boundary, mid Cretaceous. The holotype is deposited in Patrick Müller’s private collection (depository number BUB2785).

Etymology. The specific name is taken from a Latin adjective hirsutus meaning “hairy, shaggy”, and refers to the bristly or hirsute appearance, with a dense vestiture of long and slender setae.

Diagnosis. Zorotypus hirsutus sp. n. is tentatively assigned to the subgenus Octozoros based on the eightsegmented antenna. This species is readily distinguished from the other species of Octozoros by the combination of the following characters: strongly developed vestiture of bristles on the entire body; very slender, elongate antennomeres; elongated head with concave genal region; absence of thorn-like protuberances on mesonotal anterolateral corners; absence of jugate setae along posterior margin of forewings; relatively slender tibiae; empodium of meta-pretarsus reduced to a slender hair-like structure.

Description. Alate female. Integument blackish brown except antennomeres VII and VIII (Fig. 1A, B). Head subtriangular, moderately elongated, with concave genal region (Figs. 1C, 2A). Surface covered with vestiture of long setae (Figs. 1C, 2A). Compound eyes prominent; three ocelli present. Antennae 8-segmented, with vestiture of setae of moderate length (Fig. 1A, B); antennomere I elongate, approximately 4.5 times longer than wide; antennomere II relatively short, about one-third as long as antennomere I; antennomere III elongate, approximately twice as long as antennomere II; antennomeres IV–VI distinctly elongated, slender, approximately six times as long as wide; antennomeres VII-VIII very slender, approximately four times as long as wide. Maxilla only partly visible; galea with comb of mesally directed setae on apical region (Figs. 1C, 2A); slender lacinia with two small mesally directed teeth on distal part (Fig. 2A); maxillary palpus with palpomere I not visible; palpomeres II, III and V distinctly elongated; palpomere IV slightly longer than wide. Labial palpus with palpomere I partly visible; palpomere II slightly elongated and palpomere III distinctly elongated (Figs. 1C, 2A).

Pronotum subrectangular, longer than wide, slightly narrowing anteriorly; with vestiture of setae of moderate length on surface and also densely covered with long setae along margins (Fig. 1D). Mesonotum only partly visible; distinctly broader than long, about half as long as pronotum; thorn-like protuberances on the anterolateral corners absent; with vestiture of setae of moderate length on surface and along margins. Metanotum (and part of wings) covered by bubble; distinctly broader than long, slightly shorter than mesonotum, with setae of moderate length along lateral and posterior margin.

Legs densely covered with setae of moderate length; tarsi 2-segmented. Protibia with bristles arranged as comb along distal ventral half and pair of spurs inserted apically (Fig. 1C, E). Mesotibia with apical pair of spurs (Fig. 1F). Metafemur proximally expanded, gently tapering towards apex; eight stout spines (sp1–8) placed on tubercles along posterior border of ventral surface (1–7 in Fig. 1F); sp5 and sp7 distinctly elongated; sp1 slightly longer than remaining spines (Fig. 1E); right metafemur with one additional small spine between sp6 and sp7 (6+ in the inset in Fig. 1F); three stiff bristles inserted at preapical region of anterior border of ventral surface (Fig. 1F). Metatibia slender, with two stout spines at apical one-third and at apex (a, b in Fig. 1A), additionally with tiny spine near most apical spine (white arrow in Fig. 1A, G). Meta-pretarsus with pair of small pulvilli (black arrowhead in the inset in Fig. 1G); empodium reduced to slender hair-like structure (white arrowhead in the inset in Fig. 1G). Stiff spine present between metacoxae (black arrow in Fig. 1F).

Abdominal setae dense (Fig. 2C). Abdominal tergum I (T1) with transverse row of setae of moderate length along posterior margin (Fig. 2B); T2–10 with vestiture of setae of moderate length; T2–7 with pair of long, erect setae on both sides of posterior region; T8–9 with two pairs of long, erect setae on both sides of posterior region. Median up-curved projections missing (Fig. 2C). Cercus unsegmented, conical, with four or five long subapical setae almost as long as cercus, proximally with moderate to long, fine setae (Figs. 1A, B, 2B, C). Abdominal sterna I–III (S1–3) not visible; S4–8 with setae of moderate length (Fig. 2C).

Wing venation (Fig. 1A, B) visible as faint, fuscous lines; membrane hyaline except for brownish pterostigma of forewing, covered with minute setae; both fore and hind wings with dense fringes of short setae, slightly longer than those of membrane; posterior margin of forewings lacking stiff, jugate setae. Forewing (Fig. 1A) R reaching pterostigma base, evanescent distally; Rs separating from radial stem near midpoint of wing, connected with M by short rs-m cross vein; M reaching posterior wing margin, slightly proximal to termination of Rs; CuA 1 extending over third-fifths of wing, terminating on posterior margin; CuA 2 present as a very short stub in basal third of wing. Hind wing with R+M furcated near apex, both R and M reaching wing margins; Cu absent.

Remarks. A lobe-like structure is partly visible lateral to the left galea (asterisk in Figs. 1C, 2A), but could not be unambiguously identified; corresponding part on right side concealed by bubble.