Cornonannus bui sp. nov.

Luo, Jiu-Yang, Gong, Qiang-Bang & Xie, Qiang, 2022, A new genus and species of minute litter bugs family Schizopteridae Reuter, 1891 from China (Hemiptera, Heteroptera, Dipsocoromorpha), ZooKeys 1120, pp. 177-193 : 177

publication ID	https://dx.doi.org/10.3897/zookeys.1120.90086
publication LSID	lsid:zoobank.org:pub:E576A469-D336-4D82-AE48-7442B473D55C
persistent identifier	https://treatment.plazi.org/id/47B7F191-DF6B-5A53-A250-BF1F0AE6B5A4
treatment provided by	ZooKeys by Pensoft
scientific name	Cornonannus bui sp. nov.
status

Treatment

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5 , 6 View Figure 6 , 7 View Figure 7 , 8 View Figure 8 , 9 View Figure 9

Material.

Holotype: ♂, China, Yunnan Province, Dehong Prefecture, Yingjiang County, Sudian , Mengga River : 25°5'36"N, 97°51'27"E; ca 1420 m elev.; leg. Qiang Xie & Yue-Ran Wang; 2019-VIII-20 (SYSBM) GoogleMaps . Paratypes: 4♂♂, same data as holotype (SYSBM) GoogleMaps .

Diagnosis.

Same as diagnosis of genus.

Description.

Macropterous male: small (1.47-1.64 mm), oblong and stout (Fig. 1A-D View Figure 1 ). Coloration: ground color brown to dark brown, appendages yellowish brown to light brown, compound eyes dark red, ocelli light brown; punctures on head and prothorax black; distal half and about 2/3 of anterior margin of clavus, basal cell and base of trapezoidal cell of forewings whitish (Fig. 1A, D View Figure 1 ).

Surface and vestiture: head and prothorax with relatively dense setae, dense hair-like and end-enlarged microtrichia (Fig. 5A-B, D View Figure 5 ). Pterothorax with numerous tiny, oblong tubercles and dense microtrichia (Fig. 5F View Figure 5 ). Veins of forewings with sparse setae. Sterna of abdomen with sparse setae (Fig. 6C View Figure 6 ), dense microtrichia; area near connexivum with end-enlarged microtrichia (Fig. 6D View Figure 6 ). Middle region of basal sternite VII with stout-based microtrichia (Fig. 6E View Figure 6 ), middle region of sternite VII with dense small pits which with radial-ended microtrichia in the middle (Fig. 6F View Figure 6 ). Tergites of abdomen with tiny, oblong tubercles and dense microtrichia (Fig. 7A-B View Figure 7 ).

Structure: head short; wider than long; frons with up-curved frontal process in middle region (Figs 2A, C View Figure 2 , 5A, C View Figure 5 ). Eyes relatively small, minimum width of vertex/maximum width of eye ca 3.82. Ocelli small, oval. Antennae four-segmented, antennal segment I and II stout, subequal in length, segment III and IV slender, segment IV longer than III, ratio of antennal segments I:II:III:IV = 1:1.05:3.45:4.2. Labium four-segmented, labial segment I thickest, segment IV longest and tapering, ratio of labial segments I:II:III:IV = 1.78:1:1.67:2.33. Thorax: pronotum declivent, near trapezoidal, width about 1.83 times of middle length. Forewings C+Sc and R thicken, with very narrow, slender subcostal cell, R2 about three times the width of other veins (Fig. 3A View Figure 3 ). Tarsal formula 3-3-3. Forefemurs distinct thicker than middle and hind femurs. Pregenital abdomen: abdomen strongly sclerotized, rigid; tergite I-VI, sternite II-VI almost symmetric, tergite VII, sternite VII slightly asymmetric, tergite VIII strongly asymmetric (Fig. 4A-C View Figure 4 ); tergites I and II fused, with transverse groove in the middle, and 6-7 round tubercles on both sides of groove respectively; tergites III-VII with transverse groove near basal margin, tergites III-V with 6-7 round tubercles on both sides of groove respectively, tergite VI with four or five round tubercles on both sides of groove respectively, tergite VII with four round tubercles only on posterior side of groove (Figs 4B, C View Figure 4 , 7A, B View Figure 7 ). Tergite VIII also showing sinistral asymmetry, left area depressed which accommodating anophoric process (Fig. 8B View Figure 8 ). Genitalia: anophore short tubular, with large anophoric process, curving to left; anophoric process with dense spiniform setae on apical region (Figs 7C, F View Figure 7 , 8D, E View Figure 8 ). Left paramere with microtrichia at base, and oblong flattened distal projection which with two erect setae in dorsal surface; dorsum with hemispherical lobe, which with bilobate margin, two erect setae situated near the concave (Fig. 8G, H View Figure 8 ); distal projection of right paramere with two semi-erect setae on inner margin (Fig. 8I, J View Figure 8 ). Aedeagus complex, with a large, triangular basal plate; apical portion tubular, thin, protruding from pygophore about one coil (Fig. 8A, F View Figure 8 ).

Female: unknown.

Measurements

(in mm; male holotype / male paratypes, N = 4). Total body length 1.59 / 1.47-1.64; length of head 0.31 / 0.30-0.32, maximum width across eyes 0.51 / 0.48-0.50, interocular distance 0.34 / 0.31-0.34; length of antennal segment I 0.11 / 0.09-0.11, segment II 0.10 / 0.10-0.11, segment III 0.37 / 0.32-0.37, segment IV 0.44 / 0.40-0.43; length of labial segment I 0.09 / 0.07-0.09, segment II 0.04 / 0.04-0.05, segment III 0.07 / 0.07-0.08, segment IV 0.11 / 0.10-0.11; middle length of pronotum 0.44 / 0.41-0.46, humeral width 0.82 / 0.77-0.81; length of forewing 1.32 / 1.27-1.47; length of fore femur 0.39 / 0.34-0.38, fore tibia 0.44 / 0.40-0.43, fore tarsus 0.16 / 0.15-0.16; length of middle femur 0.43 / 0.38-0.42, middle tibia 0.46 / 0.41-0.45, middle tarsus 0.16 / 0.15-0.17; length of hind femur 0.51 / 0.46-049, hind tibia 0.71 / 0.65-0.68, hind tarsus 0.19 / 0.18-0.19; greatest width of abdomen 0.66 / 0.61-0.65.

Etymology.

The specific name is derived from and dedicated to Prof. Wenjun Bu (Institute of Entomology, Nankai University, China), recognizing his contributions to the study of taxonomy, phylogeography and biogeography of Heteroptera , on the occasion of his 60th birthday.

Distribution.

Known only from the type locality, Yingjiang County, Yunnan Province, China (Fig. 9 View Figure 9 ).