Tricholabidura elongata Peng & Engel 2022, sp. nov.

Tricholabidura elongata Peng & Engel, sp. nov. (Figs. 1 ̅ 3)

Etymology. The specific epithet is taken from the Latin ̅ elong ̅ atus, meaning, “elongate”, and refers to the elongate antennae and legs,particularly the secondtarsomere.

Holotype. ♀, YKLP-AMB-003, deposited in the research collection of the Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, Kunming, China.

Locality and horizon. Hukawng Valley, Kachin State, northern Myanmar; upper Albian ̅ lower Cenomanian (ca. 98.79 ± 0.62 Ma). Diagnosis. As for the genus (vide supra).

Description. ♀: Total length as preserved (excluding forceps and antenna) approximately 13.4 mm, with forceps total length approximately 16 mm; integument (as preserved) brown to light brown; with scattered punctures, particularly setigerous punctures, otherwise largely imbricate; head prognathous with length (to apex of clypeus) 1.8 mm, width (across compound eyes) 1.9 mm; surface not tumid except slightly tumid area on frons, otherwise relatively flat; ecdysial cleavage scar faint; compound eyes prominent, length 0.49 ̅ 0.53 mm, width between inner margins of compound eyes 1 mm; temple corner rounded with series of stiff, erect bristles, such bristles extending along posterior margin of head; clypeus with scattered, relatively long setae; maxillary palpus (Fig. 2C, D) length 1.5 mm, with short setae and several long setae; labial palpus length 0.64 ̅ 0.7 mm; ligula and prementum highly sclerotized, length 0.36 mm; antenna elongate, more than half of total body length, length (as preserved) 9 mm, with scattered, minute setae, with at least 30 antennomeres (Fig. 2A, B); scape shorter than distance between compound eyes, length 0.62 mm; pedicel length and width about 0.12 mm; flagellomere I length about 2.4 × width, length 0.27 mm, flagellomere II length 0.10 mm, flagellomere III length 0.16 mm; remaining flagellomeres gradually and progressively longer, shape gradually more filiform; pronotum subquadrate, 1.48 mm wide, 1.42 ̅ 1.49 mm long, slightly narrower than head, longitudinal groove of pronotum with numerous prominent and short setae, anterior margin gently convex with numerous prominent and elongate setae, anterolateral corners relatively angulate, lateral margins slightly converging posteriorly with scattered, short, suberect setae, posterolateral angle rounded with short setae, posterior border weakly convex. Tegmen long, rectangular, with numerous fine setae, length, as preserved, 2.83 ̅ 3.12 mm (one tegmen damaged and twisted), width 0.75- ̅ 1.06 mm (wider medially, lateral margins slightly converging posteriorly in apical quarter); humeral angle rounded, relatively straight; lateral margin slightly convex but generally parallel with inner margin; hind wing present and fully developed, with posteriorly directed setae, squama length 1.05 ̅ 1.15 mm, width 0.57 ̅ 0.70 mm. Legs long, slender; femora swollen, with numerous

elongate prominent setae; tibiae with abundant short setae and several thickened, elongate bristles; tarsi trimerous with spines or bristle-like setae (Fig. 3C ̅ E). Abdomen long, with abundant subappressed, fine setae (Fig. 2E); surface relatively smooth with scattered, shallow, coarse punctures; length approximately 8.5 mm (excluding forceps); segments transverse, maximum width 2.3 mm; basal segments overlapped by tegmina; lateral margins relatively straight; slightly wider at midlength; pygidium prominent (Fig. 3B), basal width 0.23 ̅ 0.28 mm, medial length (excluding apical process) 0.42 mm, with prominent, slender, medioapical process, process length 0.12 ̅ 0.14 mm; gonapophyses elongate, slender, length 0.48 ̅ 0.56 mm; forceps nearly oval in cross section, glabrous, length 2.1 ̅ 2.3 mm, basal maximum width 0.51 mm, separation between bases 0.52 mm.

ZooBank LSID: This nomenclatural act is registered in ZooBank (www.zoobank.org), the official registry of the International Commission on Zoological Nomenclature, with the following LSID: urn:lsid:zoobank.org:act:A247327C-DC3C-4BED-AE9B- BAA4ED16C4AC.