Tyloperla bimaculata Li &amp; Kong 2020, sp. nov.
Creators: name: Li, Weihai
name: Kong, Fanbin
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Tyloperla
Tyloperla bimaculata

description: <i>Tyloperla bimaculata</i> sp. nov. <b>(</b> Figs. 1–3) <b>Male</b>. Body length ca. 13.8 mm, forewing length ca. 17.2 mm, hindwing length ca. 15.0 mm. General color yellow brown. Triocellate, anterior ocellus smaller. Head slightly wider than pronotum, mostly pale, with a pair of small dark brown patches forward of posterior ocelli, the patch subequal to the size of one posterior ocellus; compound eyes dark; antennae brown. Pronotum mostly brown, anterior margin darker, with paired closely set longitudinal median strips and dense, distinct brown rugosities (Fig. 1a); wing membrane pale brown, veins brown; legs mostly yellowish brown, knees darker. <i>Terminalia</i>. Posterior margin of tergum 7 with a small patch of sensilla basiconica. Tergum 8 with a large field of sparse sensilla basiconica, its posterior part sclerotized, with an upraised brown sclerite together with two triangular wings which generally seems like a butterfly, in lateral aspect this area appearing as a projecting cone. Membranous portion of tergum 9 anteriomedially with dense small sensilla on an elevated area better seen in lateral view. Hemitergal processes of tergum 10 grooved along inner surface, tip acute and slightly hooked in lateral view; basal callus rounded (Figs. 1b &amp; 1c). Aedeagus (Figs. 1 d–1e, 2 &amp; 3): Aedeagal tube with paired membranous, conical, dorsoapical lobes. Aedeagal sac trilobed: medial lobe abruptly curved medially, apical third offset by a shallow but distinct groove; basal band of spines and basal portion of apical spinous band interrupted into two patches (Figs. 2b, 3b), armature of apical third dark and stout; lateral lobes darkly pigmented, with densely clustered, stout spines (Figs. 2a, 3a). <b>Female</b>. Unknown. <b>Type Material.</b> Holotype: male, China: Guizhou, Suiyang County, Kuankuoshui National Nature Reserve, 300 m, 107°19.98 E, 28°24.03 N, 2010.VIII.13, Yan Li (CAU). <b>Etymology</b>. The specific epithet refers to the two stigmata of the head. <b>Distribution</b>. China (Guizhou). <b>Remarks</b>. The new species is closely related to <i>T. illiesi</i> originally described from Vietnam (also known from Yunnan Province of China as reported below) in the general characters of terminalia and aedeagus. However, the ocellar patch of <i>T. illiesi</i> is entire between posterior ocelli and much larger and extends to M-line, whereas the medially interrupted patch in the new species is much smaller and about as large as one posterior ocellus. Additionally, the spinous sclerite on tergum 8 in <i>T. bimaculata</i> <b>sp. nov.</b> is butterfly-like but that in <i>T. illiesi</i> is roughly rounded and tergum 7 in <i>T. illiesi</i> has no patch of sensilla basiconica as occurring in <i>T. bimaculata</i>. Finally, the basal band of spines and the basal portion of apical spinous band of the aedeagal sac in <i>T. bimaculata</i> <b>sp. nov.</b> are interrupted dorsally whereas those patches are entire in <i>T. illiesi.</i>
description: Published as part of <i>Li, Weihai &amp; Kong, Fanbin, 2020, A new species and new record of Tyloperla (Plecoptera: Perlidae) from China, pp. 289-294 in Zootaxa 4728 (2)</i> on page 290, DOI: 10.11646/zootaxa.4728.2.10, http://zenodo.org/record/3621109