Protarcys lutescens Klapalek 1912
Creators: name: Mo, Raorao
name: Li, Weihai
name: Murányi, Dávid
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlodidae
Protarcys
Protarcys lutescens

description: Protarcys lutescens Klapálek, 1912
(Figs. 1E–F, 3B, 4E–F)
Protarcys lutescens Klapálek, 1912: 8 (original description of the male and female); Wu 1935: 300 (catalog); Wu 1938: 31 (monograph, with the reproduction of the original figures); Claasen 1940: 117 (catalog); Illies 1966: 375 (revised combination); Li & Murányi 2015: 52 (type locality data); Yang & Li 2018: 52 (catalog); DeWalt et al. 2024 (catalog).
Arcynopteryx (Protarcys) lutescens Klapálek, 1912: Ricker 1943: 8 (new combination); Ricker 1952: 81 (catalog).
Diagnosis. Forewing with irregular reticulation between the apical part M veins. Female: subgenital plate prolonged in a wide triangular apex with an incised tip, incision shallow and subtriangular. Egg: shape drop-like to oval, collar not separated from chorion, bearing one short row of FCIs, rim not flanged.
Material examined. 1 female, CHINA: Sichuan Province, Garzê Tibetan Autonomous Prefecture, Kangding County, Lucheng, 30° N, 102° E, 3 Jun. 1893, leg. G.N. Potanin (Labels: Cычуан, / ТаЦЗинлу. / Потанин 3.VI93; lutescens / Klapálek; Collentio / Klapálek; black label; TYPUS (red label)).
Redescription
Female (Figs. 1E–F). Medium sized, macropterous forewing length 15.0 mm. General color dark brown, with bright yellow pattern on head and pronotum. Head brown, triocellate and with relatively big eyes; posterior ocelli set closer to eyes than to each other. Occipital region mostly pale, with distinct rugosities; area between the three ocelli dark, tentorial callosities and M-line distinct; no distinct wrinkles between M-line and the lateral margins. Moderately long submental gills present. Palpi brown, scape and pedicel dark brown, rest of antennae brown. Pronotum square, slightly wider than long, narrower than head with eyes. Its ground colour dark brown, with distinct bright yellow longitudinal stripe; rugosities are dark and distinct. Legs with femora banded with dark and pale stripes apically, tibiae banded both basally and apically. Wings with dense crossveins, irregular reticulation present between the apical part of R and M veins on the forewing, and between the R veins on the hindwing.
Abdomen dark brown (Fig. 3B). Sterna 7–8 covered with uniform long hairs. Subgenital plate on sternum 8 prolonged in a wide triangular apex with an incised tip, covering basal half of sternum 9. Sternum 9 is paler than subgenital plate, with two conspicuous dark spots laterally. Paraprocts triangular, cerci shorter than the body, cercomeres cylindrical.
Egg (Figs. 4E–F). 0.55–0.60 mm long, 0.35–0.40 mm wide (n = 11). Shape drop-like to oval, cross section round but lateral side often depressed, no longitudinal ridges visible. Hatching line inconspicuous. Micropyles placed in a subequatorial line, not raised, each located at the meeting of ditches between follicular cell impressions (FCIs). Chorion with ornamentation of penta- and hexagonal FCIs. Collar round, not separated from chorion, bearing one short row of FCIs, rim not flanged. Anchor cannot be studied in detail.
Distribution. China (Sichuan Province).
Affinities. The single available female is distinctive with its triangular subgenital plate having a shallow and narrow apical incision. It is the closest to P. caudata, distinction is detailed above.
description: Published as part of Mo, Raorao, Li, Weihai & Murányi, Dávid, 2025, Protarcys Klapálek, 1912, the senior synonym of Neofilchneria Zwick, 1973 (Plecoptera: Perlodidae), pp. 68-78 in Zootaxa 5618 (1) on pages 74-76, DOI: 10.11646/zootaxa.5618.1.4, http://zenodo.org/record/15217279