Neoperla monacha, Stark & Sivec, 2008

Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, Illiesia 4 (3), pp. 19-54 : 24-25

publication ID	https://doi.org/ 10.5281/zenodo.4758856
DOI	https://doi.org/10.5281/zenodo.4758959
persistent identifier	https://treatment.plazi.org/id/03CA87B2-FF83-FFE5-FC69-2AE47526F8D0
treatment provided by	Felipe
scientific name	Neoperla monacha
status	sp. nov.

Treatment

Neoperla monacha View in CoL sp. n.

( Figs. 12‐14 View Figs )

Material examined. Holotype ♂ from Vietnam, Cao Bang, Ba Be National Park near dorm annex, UV light, 17 May 1995, D. Currie, J. Swann, J. Whiting, ROM 956058 View Materials ( ROM).

Adult habitus. Biocellate. Head dark brown over occiput and most of frons; antennal bases pale. Pronotum brown with darker rugosities ( Fig. 12 View Figs ). Wings brown, veins dark brown with basal half of R vein very dark and costal area pale. Legs uniformly dark brown.

Male. Forewing length 10 mm. Tergum 7 process triangular, armed on apex with 2‐3 spines. Tergum 8 mesal sclerite a low triangular mound with a few sensilla basiconica. Tergum 9 without sensilla patches. Hemitergal processes straight and relatively long ( Fig. 13 View Figs ). Aedeagal tube sclerotized and bearing a small lateral spiny knob in apical third and a pair of low spiny knobs near these on venter; additional spines occur on tube at dorsoapical and ventroapical margins ( Fig. 14 View Figs ). Aedeagal sac about 2.5 times as long as tube and sparsely armed along most of sac length with an irregular row of large dorsal spines; short lateral row of additional spines occur at base of sac ( Fig. 14 View Figs ).

Female. Unknown.

Larva. Unknown.

Etymology. The species name refers to the presumed rarity of this species.

Diagnosis. This small, dark brown species has relatively straight, inwardly slanted hemitergal processes, few sensilla basiconica on tergum 8 and none on tergum 9; however a few long setae are present in a mesal patch on tergum 9 between the tips of the hemitergal processes. The aedeagal sac is extraordinarily long, at least 2.5 times as long as the tube and the sac armature consists of an irregular, sparse row of large spines along most of the sac length. The tube bears two pairs of small, ventrolateral spiny knobs beyond midlength. The aedeagus of this species does not appear very similar to any of the known Asian species. The size and color pattern of this species are similar to N. teresa and Neoperla VN‐ A (both described below) but N. monacha differs from both in having uniformly dark hind femora.