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Zorotypus pecten Mashimo, sp. n. (Fig. 1) Holotype. Alate male; MYANMAR, Kachin State, Hukawng Valley; Albian-Cenomanian, mid Cretaceous. The holotype is deposited in PM’s private collection (depository number BUB2809). Etymology. The specific name is taken from the Latin pecten, meaning “comb” and refers to the paired ctenidia along the posterior margin of T 9. It is a noun in apposition. Diagnosis. This species resembles Zorotypus cenomanianus Yin, Cai & Huang, 2017 with respect to its ctenidium and the group of thick setae of T 9, but is easily distinguished from it by the presence of a group of thick setae on T 10. The rugose body surface of Z. pecten sp. n. is conspicuous, but the possibility of artifact cannot be eliminated completely. Description. Alate male (Fig. 1). Integument brown except antennomeres VII and VIII, slightly lighter on distal parts of legs (Fig. 1A, B). Body surface rugose (Fig. 1A, B). Antennae 8-segmented; antennomere I distinctly elongate, approximately 4.5 times longer than wide; antennomere II short, about one-third as long as antennomere I; antennomere III subequal to antennomere II; antennomeres IV–VIII elongate, approximately 2.3–2.5 times as long as wide (Fig. 1A, B). Pronotum subrectangular, with vestiture of short setae. Metafemur with six stout spines (sp1–6) placed on tubercles along posterior border of ventral surface, faintly visible (1–6 in Fig. 1 C–E); two stiff bristles inserted on anterior border of ventral surface (1’, 2’ in Fig. 1C, D); sp5 and sp6 distinctly elongated; sp3 and sp4 slightly longer than remaining ones. Metatibia relatively stout, with two stout spines at apical third and at apex (a, c in Fig. 1C), additionally with small spine near stout apical spine (b in Fig. 1C). Meta-pretarsus with pair of small pulvilli (arrowheads in Fig. 1F); empodium reduced to hair-like structure. Abdominal terga (Fig. 1A, G) sparsely set with short setae, also with longer setae along posterior margin; posterior half of T 9 with short setae and two pairs of long, erect setae; posterior margin with dense group of short and thick setae at middle region, also with two rows of thick setae arranged as comb (ctenidium) on both sides (Fig. 1G, H); T 10 medially sclerotized, with group of short, thick setae, also with pair of setae of moderate length on both sides of this cluster (Fig. 1G, H); T 11 uniformly sclerotized, with several setae of moderate length and with two or three long setae on both sides of posterior margin, additionally with median up-curved projection (Fig. 1G, H). Cercus conical, with four or five long subapical setae subequal to length of cercus (Fig. 1A, G, H). Chaetotaxy of abdominal sterna hardly recognizable; posterior margin of S8 medially produced and more sclerotized (arrow in Fig. 1H). Forewing (Fig. 1A, B) with brownish pterostigma at anterior margin; R obliterating in pterostigma base, not reaching wing margin; Rs separating from radial stem near midpoint of wing, separated from M by short rs-m cross vein; M reaching posterior wing margin near wing apex; CuA 1 extending over 3/5 of wing, terminating on posterior wing margin; CuA 2 short, restricted to basal 1/3 of wing. Posterior margin of forewing lacking stiff, jugate setae. Hindwing without Cu. |
