Nemoura peristeri Aubert, 1963

Murányi, Dávid, 2007, New and little – known stoneflies (Plecoptera) from Albania and the neighbouring countries, Zootaxa 1533, pp. 1-40 : 24-25

Nemoura peristeri Aubert, 1963 ( Figs 65–69 )

Nemoura peristeri Aubert, 1963 — Aubert 1963: 127 –128. ( Macedonia, Perister: ♂ holotype, Ψ allotype, 8♂ 7Ψ paratypes)

Nemoura pelisteri Aubert, 1963 (sic!) — Ikonomov 1986: 91. ( Macedonia)

Material: MACEDONIA: Perister (sic!) Mountains, 12.07.1955, leg. F. Schmid: Paratype male ( ZML); Pelister Mountains, 2300 m, 20.07.1977, leg & det. Ignac Sivec (1 male epiproct prepared on slide): 2♂ 2Ψ; Pelister Mountains, Ni_epole, brook with Alnus bush above the sky course, N 40°58’48.7” E 21°15’09.9”, 1375 m, 17.10.2006, leg. LD, JK, DM: 1♂.

Redescription: Small sized species, brachypterous in both sexes. Body length: ♂ 5.5–6.0 mm, Ψ 7.5–8.0 mm; forewing length: ♂ 3.0– 3.5 mm, Ψ 4.5–5.0 mm. Head light brown behind the posterior ocelli, dark brown anteriorly. Scapes yellowish, rest of the antenna black, palpi yellowish. Pronotum subtrapezoidal with rounded corners, ground colour yellow with dark, granulated ornamentation. Legs yellow, distal half of femora and tarsal segments darkened. Wings hyaline, venation dark brown. Abdomen white except for terminal segments, which are dark brown.

Male terminalia: Hypoproct longer than wide, vesicle more than twice as long as wide, slightly narrower in the middle. Paraproct medial margin of the outer lobe concave, outer margin sinuous. Tip of the outer lobe rounded, and curved inwards; entire paraprocts covered with bristles ( Fig 68 ). Cerci strongly sclerotized, except apex around the vestigial segment, and in the inner base. Cerci broadly convex at the base, then curved inwards and ending in a head with two strong, sharply pointed hooks. Tergite X medially bearing two distinct, strongly sclerotized humps under the tip of the epiproct ( Figs 65–67 ). Epiproct slightly elongate, widest in its basal third. Parallel ridges of the ventral sclerite bearing 11–12 spines ventrally. Arms of the ventral sclerite forming an oval, thin ring dorsally, which extends into straight, thorn–like apical sclerites. Apical sclerites less than half the length of the arms ( Fig 69 ).

Female terminalia: Pregenital plate large, covering most of length and less than two thirds the width of sternite VII, and nearly reaching the posterior margin of the sternite VIII. Posterior edge broadly rounded, darker than the rest of the plate which is light brown ( Fig 63 ). Vaginal complex with two sclerotized, ring– shaped postvulvar lobes and simple receptaculum seminis ( Fig 64 ). Cerci and paraprocts typical for the genus.

Larva: Unknown.

Remarks: The specimens reported from various parts of western Macedonia by Ikonomov (1986) possibly refers to N. anas sp. n.. This remarkable brachypterous species apparently occurs only in the Pelister Mountains in SW Macedonia. The name of the species is derived from a mispelling of its origin (however, the Macedonian name of these mountains is Baba Planina). Affinities of this species are already discussed under N. anas .

Figures

FIGURES 65 – 69. Male of Nemoura peristeri Aubert — 65: terminalia, vental view; 66: terminalia, dorsal view; 67: terminalia, lateral view; 68: paraproct tip, ventral view; 69: epiproct, upside dorsal, downside ventral view — scale 0.5 mm, Figs 68 – 69 not to scale.

FIGURES 61 – 64. Females of Nemoura anas sp. n. and N. peristeri Aubert — 61 – 62: Nemoura anas sp. n.; 63 – 64: N. peristeri Aubert; 61, 63: terminalia, ventral view; 62, 64: vaginal complex — scale 0.5 mm, Figs 62, 64 not to scale.