Perlomyia martynovi ( Zhiltzova, 1975 )

Murányi, Dávid & Hwang, Jeong Mi, 2017, Four new species and further contributions to the Leuctridae (Plecoptera) of the Korean Peninsula, Zootaxa 4282 (1), pp. 43-61 : 55-56

Perlomyia martynovi ( Zhiltzova, 1975)

( Figs. 23–25 )

Synonymy indicated in Murányi et al. 2014: 147.

New material. SOUTH KOREA: CB, Danyang-gun , Yeongchun-myeon , Namcheon-ri , Namcheon, Sobaeksan (Mt.), 14.v.2015, leg. J.C. Jung: 1♂ 2♀ ( KUEM), 1♂ 1♀ ( HNHM).

Diagnosis. Male: Tergum IX without distinct posteromedial lobe, tergum X without knobs or spines. Epiproct with wide and undivided base, apical half abruptly bent foreward, dorsal surface elevated and with acute, downcurved tip. Cercus short and rounded. Female: Sternum VII rectangular, with a small hemispherical membranous area posteromedially, not fused to sternum VIII. Median sclerites on sternum VIII are with dark brown inner keel; rest of the sclerites dark brown, longer than the keel, the sclerites are hardly wider than long. Further two pairs of sclerites present at the lateral edges of median sclerites, and at the posterolateral edge of the segment.

Description of the male. Small sized species, macropterous. Forewing length: 4.4–6.2 mm, body length: 4.5– 5.3 mm. Head dark brown with distinct rugosities; antennae brown, palpi pale. Pronotum paler than head, one and half times longer than wide, narrower than head; rugosities distinct. Meso- and metanotum brown, with longitudinally arranged dark brown patches; meso- and metathoracic basisterna with a pair of longitudinal dark stripes. Legs uniformly brown; wings hyaline, venation brown. Setation generally short.

Male abdomen ( Figs. 23–25 ): Antecosta interrupted on terga I–III, entire on terga IV–IX, terga I–II with a median membranous field. Tergum IX with moderately curved antecosta, posteromedial portion lacks lobe or has only a vestigial one. Integument between terga IX–X with dense anterior field of setae, touching the not fully divided posterior field of shorter setae. Tergum X lacks knobs or spines, antecosta of the hemiterga more convex and with small anterior sclerite, posteromedial paired sclerites large. Epiproct with wide, undivided base; the apical half is abruptly bent foreward and robust, bears a membranous caudal callus with setae, dorsal surface is elevated in midlength of the apical half, the tip is downcurved, acute. Paraprocts fused into a wide, long lobe that is lightly sclerotized at its tip. Cercus short and rounded, bears small basodorsal lobe, apical wart distinct. Sterna I–VIII simple, sternum IX bears an oval ventral lobe that is wider than long, prolonged apex abruptly divided from the base of the sternum, moderately long.

Affinities: Discussed under the closely related P. koreana .

Distribution. Known from a large area of the Pacific coastal East Palaearctic, from the Magadan area of Russia south into the Korean Peninsula. New for South Korea ( Fig. 38 ).

Figures

FIGURES 23 – 25. Male terminalia of Perlomyia martynovi (Zhiltzova, 1975), South Korea, Chungcheongbuk Province— 23: dorsal view; 24: ventral view; 25: lateral view— scale 0.5 mm.

FIGURES 38 – 40. Korean distribution of the genus Perlomyia Banks, 1906 — 38: P. martynovi (Zhiltzova, 1975); 39: P. secunda (Zapekina-Dulkeit, 1955); 40: P. smithae Nelson & Hanson, 1973.