Hemacroneuria mengyuanae Huo & Du, 2021

Huo, Qing-bo, Zhu, Bin-Qing & Du, Yu-Zhou, 2021, New illustrations, new species and new combination of Hemacroneuria Enderlein (Plecoptera: Perlidae) from China, Zootaxa 5032 (4), pp. 563-576 : 571

Hemacroneuria mengyuanae Huo & Du , sp. nov.

( Figs. 14–16 )

Male: Forewing length ca. 21 mm, hindwing length 19 mm, body length 17 mm. Color dark black, with green and indigo blue metallic luster. Triocellate, anterior ocellus much smaller. Antennae and palpi black. Pronotum rectangular, width about 2X of its length, corners obtuse and lateral margins rounded. Wide black stripe in middle 40% of pronotum containing prominent rugosities, lateral margins bright orange, a narrow white stripe at posterior of black stripe. Wing membranes and vein dark, costal area hyaline ( Fig. 14 ).

Abdomen dark brown with slight blue luster ( Fig. 15 ). Tergum 10 with a pair of posterolateral bumps bearing sensilla basiconica patches; anterior margin separated by a pale, longitudinal median notch. Paraprocts bright orange, triangular and wide, curved anteriorly. Hammer large, transversely rounded, and covered by distinct dark granules, slightly elevated in lateral view; surrounded by a large yellowish, axe shape area. Aedeagus membranous, shape similar to H. violacea , but most of surface with a few visible ventral spinules ( Fig. 16 ).

Type material: Holotype: 1♂ ( ICYZU), China, Guangdong Province, Shaoguan City, Nanling National Forest Park, 840 m, 24°54'60" N, 113°2'3" E, 2021-IV-20, leg. Zhao Meng-Yuan.

Etymology: The species is named in honor of Miss. Zhao Meng-Yuan, the collector.

Distribution: China (Guangdong Province).

Remark: The new species is similar to H. violacea but can be distinguished by the orange lateral margins of pronotum, orange paraprocts, and the large pale area around the hammer. Specimen was collected by a small river (width: 5~ 10m) surrounded by dense riparian vegetation.

Figures

FIGURE 14. Hemacroneuria mengyuanae. Male, A: habitus (dorsal and ventral); B: head and pronotum.

FIGURE 15. Hemacroneuria mengyuanae. Male abdomen, A: dorsal; B: ventral.

FIGURE 16. Hemacroneuria mengyuanae. Male, A: terminalia, dorsal; B: hammer; C. aedeagus, dorsal; D. aedeagus, ventral.