Zorotypus pecten Mashimo, 2019

Mashimo, Yuta, Müller, Patrick & Beutel, Rolf G., 2019, Zorotypus pecten, a new species of Zoraptera (Insecta) from mid-Cretaceous Burmese amber, Zootaxa 4651 (3), pp. 565-577 : 566-567

publication ID	https://doi.org/ 10.11646/zootaxa.4651.3.9
publication LSID	lsid:zoobank.org:pub:057923C4-B4AD-4CA8-8129-DFD1FA58B64C
DOI	https://doi.org/10.5281/zenodo.5610054
persistent identifier	https://treatment.plazi.org/id/F77487FD-FFFF-086A-FF6A-FBB37ED2FE3F
treatment provided by	Plazi
scientific name	Zorotypus pecten Mashimo
status	sp. nov.

Treatment

Zorotypus pecten Mashimo View in CoL , sp. n.

( Fig. 1 View FIGURE 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 View FIGURE 1 ). Integument brown except antennomeres VII and VIII, slightly lighter on distal parts of legs ( Fig. 1A, B View FIGURE 1 ). Body surface rugose ( Fig. 1A, B View FIGURE 1 ). 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 View FIGURE 1 ).

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 View FIGURE 1 C–E); two stiff bristles inserted on anterior border of ventral surface (1’, 2’ in Fig. 1C, D View FIGURE 1 ); 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 View FIGURE 1 ), additionally with small spine near stout apical spine (b in Fig. 1C View FIGURE 1 ). Meta-pretarsus with pair of small pulvilli (arrowheads in Fig. 1F View FIGURE 1 ); empodium reduced to hair-like structure.

Abdominal terga ( Fig. 1A, G View FIGURE 1 ) 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 View FIGURE 1 ); 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 View FIGURE 1 ); 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 View FIGURE 1 ). Cercus conical, with four or five long subapical setae subequal to length of cercus ( Fig. 1A, G, H View FIGURE 1 ). Chaetotaxy of abdominal sterna hardly recognizable; posterior margin of S8 medially produced and more sclerotized (arrow in Fig. 1H View FIGURE 1 ).

Forewing ( Fig. 1A, B View FIGURE 1 ) 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.