Perlodinella microlobata Wu, 1938

Huo, Qing-Bo, Rehman, Abdur, Du, Yu-Zhou & Chen, Zhen-Ning, 2022, Rediscovery of Perlodinella microlobata Wu, 1938, with notes on Tibetisoperla sclerotica Yan, Chen, Bozdogan & Li, 2022 (Plecoptera: Perlodidae), Zootaxa 5205 (1), pp. 26-34 : 27-32

Perlodinella microlobata Wu, 1938

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:737

Perlodinella microlobata: Wu, 1938 , 55; Yang & Li, 2018, 52.

Adult habitus: See Wu (1938). The original illustrations of terminalia of type materials are shown in Fig. 1 .

Supplementary description: In the specimen from Qinghai, male coloration varies from dark brown to black ( Fig. 2 ). Head mostly black, yellow spots only present between the hind ocelli and median occiput ( Fig. 3A ). Pronotum with a yellow median band ( Fig. 3A ). Posterior margin of male tergum 9 with a median swelling covered by a horizontal oval patch of sensilla basiconica; tergum 10 caudally constricted and extended upwards, apex bearing a triangular patch of sensilla ( Fig. 4A–B ). Paraproct subtriangular, inner base with darker spot; apex membrane but without obvious apical sclerite ( Fig. 4C ). Epiproct membranous, with a few sparse dorsal spines and dense ventral asperities ( Figs. 3B–C , 5A–C ). Penis membranous, bearing dense basal and subterminal spines ( Fig. 5D ).

For the specimen from Sichuan, the male coloration is brownish ( Fig. 6 ) and the pattern of head is similar with the male from Qinghai ( Fig 7A ). The posterior margin of tergum 9 and median sternum 9 have paler coloration ( Figs. 7B–C , 8A–B ). Paraprocts are darker on the base ( Fig. 8C ). Because these materials have been soaked in 75% alcohol for more than 10 years, the body color is much lighter than the fresh specimen from Qinghai.

Females from Sichuan have coloration patterns that are similar to males ( Figs. 9 , 10A ). The subgenital plates is sclerotized medially ( Fig. 10B–C ), with an outline same to the illustrations of Wu (1938) ( Fig. 1 ).

Nymph: Unknown.

Mature egg: General color brown. Wide and trilateral, with three longitudinal ridges; surface except the ridges covered by dense asperities; each side of the egg with 3–6 short transverse rows of micropyles ( Fig. 11A, C ). Collar is a short brown ring, cylindrical with a broad base. Anchor flat, without massive stem, base evenly covered with large globular bodies ( Fig. 11A–B ).

Material examined: 1 male, China, Qinghai Province, Haixi Mongol and Tibetan Autonomous Prefecture , Tianjun County, 2021-VII-13, 37.568689°N, 98.657256°E, 3545 m, leg. Huo Qing-Bo ( ICYZU) . 1 male, 3 females, China, Sichuan Province, Garze Tibetan Autonomous Prefecture , Shiqu County, 2009-VI-29, 32.838611°N, 98.376944°E, 4200 m, leg. Qian Yu-Han ( ICYZU) .

Distribution: China (Gansu, Qinghai, Sichuan, Shanxi, Liaoning) ( Wu 1938, Yang & Li 2018).

Remarks: In Tianjun County, the sole male of P. microlobata was collected with several P. kozlovi Klapálek, 1912 and Tibetisoperla wangluyui together in the same environment. Perlodinella microlobata may emerge much later than P. kozlovi in general. In addition, the specimens of P. microlobata from Shanxi and Liaoning mentioned by Wu (1938) were all females, without collecting any associated males. Considering that the female features may be variable ( Huo et al. 2020, 2022), the validity of the distribution record in Shanxi and Liaoning is doubtful and needs further study.

Figures

FIGURE 1. Published illustrations of terminalia of Perlodinella microlobata (from Wu, 1938).

FIGURE 2. Perlodinella microlobata from Qinghai, male habitus, dorsal (left) and ventral (right) views.

FIGURE 3. Perlodinella microlobata from Qinghai, male. A: head and pronotum; B–C: terminalia, dorsal (B) and ventral (C) views.

FIGURE 4. Perlodinella microlobata from Qinghai, male terminalia. A: sensilla patch on tergum 10; B: sensilla patch on tergum 9, lateral view; C: paraprocts, ventral view.

FIGURE 5. Perlodinella microlobata from Qinghai, male. A–C: epiproct, dorsal (A), lateral (B), and ventral (C) views; D: penis (partly everted).

FIGURE 6. Perlodinella microlobata from Sichuan, male habitus, dorsal (left) and ventral (right) views.

FIGURE 7. Perlodinella microlobata from Sichuan, male. A: head and pronotum; B–C: terminalia, dorsal (B) and ventral (C) views.

FIGURE 8. Perlodinella microlobata from Sichuan, male terminalia. A: sensilla patches on terga 9–10; B: sensilla patch on tergum 9, lateral view; C: paraprocts and epiproct (partly everted), ventral view.

FIGURE 9. Perlodinella microlobata from Sichuan, female habitus, dorsal (left) and ventral (right) views.

FIGURE 10. Perlodinella microlobata from Sichuan, female, A: head and pronotum; B–C: terminalia, both ventral views; outlines of subgenital plates are marked in red.

FIGURE 11. Perlodinella microlobata from Sichuan, eggs. A: whole egg; B: collar view; C: multiple immature and mature eggs.