Haploperla datongensis Chen & Du

Chen, Zhi-Teng & Du, Yu-Zhou, 2016, Two new species of Haploperla (Plecoptera: Chloroperlidae) from China, Zootaxa 4196 (3), pp. 415-422 : 418-421

Haploperla datongensis Chen & Du , sp. nov.

Figs. 11–20 .

Adult habitus. Triocellate. General color yellow patterned with dark brown. Head mostly yellow without any markings; compound eyes and ocelli dark ( Figs. 11 , 19–20 ). Pronotum hyaline, with brown median stripe and margins; meso- and metanota with dark W-shaped markings. Wings hyaline, Rs of both wings branched; A3 of forewing fused with A2 near base; anal field of hindwing small and folded with three veins ( Fig. 18 ). Coxae, tibiae and femora pale, tarsi brown. Terga 1–8 darkened with wide, dark brown middorsal stripe ( Figs. 19–20 ). Cerci yellowish-brown with long brown setae.

Male. ( Figs. 11–16, 18–19 ). Forewing length 6.0– 6.5 mm, hindwing length 5.0– 5.5 mm. Posterior margin of tergum 9 slightly enlarged and covered with fine hairs. Tergum 10 divided ( Fig. 12 ). Epiproct “tongue-shaped” in dorsal view, “bird head” shaped in lateral view; anterior margin and anteroventral surface strongly sclerotized; dorsal area mostly membranous, posteriorly with sparse, short setae; apex rounded ( Figs. 12–14 ). Aedeagus membranous and curved ventrally, ventrally with two median elliptical lobes, each lobe connected with a sclerotized stylus, the stylus S-shaped in lateral aspect and nearly parallel-sided from base to tip; ventral aedeagus also with a pair of parallel sclerotized stripes ( Figs. 15–16 ).

Female. ( Figs. 17 , 20 ). Forewing length 7.0– 7.5 mm, hindwing length 6.0– 6.5 mm. General color similar to males. Abdominal terga 1–8 each with a dark brown, oval spot ( Fig. 20 ). Ventral surface and terminalia without markings. Subgenital plate broad, originated from tergum 8 to near half of tergum 9; posterior margin rounded ( Fig. 17 ).

Type material. Holotype male, China: Qinghai Province, Datong County, Mt. Dabanshan, Haomen River , 101°41.43′ E, 37°32.51′ N, 3482 m, 27 August 2016, leg. Yu-Zhou Du, Zhi-Teng Chen, Qin-Bo Huo . Paratypes: 2 males and 1 female, same locality and data as holotype .

Etymology. The species is named after the type locality, Datong County.

Diagnosis. This species is characterized by a pale head, pronotal disc with median stripe and brown margins, and the abdominal terga 1–8 with a middorsal longitudinal stripe. Epiproct “tongue-shaped” in dorsal view and resembles a “bird head” in lateral view; anterior margin, and anteroventral surface strongly sclerotized. Aedeagus curved ventrally, ventrally with two elliptical lobes, each lobe connected with a curved, sclerotized stylus; ventral aedeagus with a pair of parallel sclerotized stripes.

Remarks. This new species seems similar to H. valentinae Stark & Sivec, 2009 , known from Sichuan Province, China. However, the epiproct of H. datongensis has a more rounded tip than the narrow tip in H. valentinae (see figs. 9–10 and 13 in Stark and Sivec 2009). Tergum 9 of H. datongensis has a slightly inflated posterior lobe, which is absent in H. valentinae . The pattern on abdominal terga 1–8 also differs from the original description of H. valentinae . In addition, subgenital plate of the female of H. datongensis is broader than that of H. valentinae , and the large median microtrichia patch of H. valentinae is absent in H. datongensis (see fig. 15 in Stark and Sivec 2009). The new species is also similar to H. triangulata Chen & Du, 2016 , which was also collected from Qinghai Province. Whereas in H. triangulata , the posterior margin of tergum 9 is concave, the epiproct is mostly sclerotized with a blunt tip and lacks setae; the aedeagus is much simpler; the subgenital plate of female is much longer than that in H. datongensis (see figs. 2, 5– 7 in Chen and Du, 2016).

Figures

FIGURES 11 – 14. Haploperla datongensis, sp. nov. 11. Male head and pronotum, dorsal view; 12. Male terminalia, dorsal view; 13. Male terminalia, lateral view; 14. Male terminalia, dorsolateral view.

FIGURES 15 – 18. Haploperla datongensis, sp. nov. 15. Aedeagus, lateral view; 16. Aedeagus, ventral view; 17. Female terminalia, ventral view; 18. Wings.

FIGURES 19 – 20. Haploperla datongensis, sp. nov. 19. Male habitus, dorsal view; 20. Female habitus, dorsal view.