Velia ( Cesavelia ) yiliangensis, Fu & Jin & Ye, 2025

Fu, Siying, Jin, Zezhong & Ye, Zhen, 2025, Three new species of Velia (Cesavelia) Koçak & Kemal, 2010 (Hemiptera, Heteroptera, Veliidae) from China, ZooKeys 1254, pp. 313-329 : 313-329

publication ID	https://doi.org/10.3897/zookeys.1254.156152
publication LSID	lsid:zoobank.org:pub:72A88792-371F-4288-92DE-97541FCBD62B
DOI	https://doi.org/10.5281/zenodo.17259545
persistent identifier	https://treatment.plazi.org/id/8E26DFF7-CE6A-5D62-97ED-CA1F2BBE1EDD
treatment provided by	ZooKeys by Pensoft
scientific name	Velia ( Cesavelia ) yiliangensis
status	sp. nov.

Treatment

Velia ( Cesavelia) yiliangensis sp. nov.

Figs 1 e, f View Figure 1 , 2 e, f, k, l View Figure 2 , 3 c View Figure 3 , 4 e, f, k, l, o, t, u View Figure 4

Material examined.

Holotype: apterous ♂, China • Yunnan Province, Zhaotong City, Yiliang County, Xiaocaoba Scenic Area : 27.8271°N, 104.2869°E; 1758 m a. s. l.; 2020-VIII-19; Mu Qiao leg. ( NKUM) GoogleMaps . Paratypes: 1 apterous ♂, 5 apterous ♀, same data as holotype ( NKUM) GoogleMaps .

Diagnosis.

Body medium (length 6.33–6.80, width 1.82–2.27), mainly medium brown. Connexiva of apterous female curved, convergent in dorsal view posteriorly, with large, bright yellow stripes along entire connexiva in both sexes (Figs 1 e, f View Figure 1 , 2 e, f, k, l View Figure 2 ), connexival spines short, caudally directed in males, absent in females (Fig. 2 e, f, k, l View Figure 2 ); abdominal segment VIII of male stout and ventrally concave (Fig. 4 e, f View Figure 4 ); proctiger of male broad, shield-shaped, posterior margin rounded (Fig. 4 k View Figure 4 ); paramere relatively slender, strongly curved, with thick setae on external side, apices sharp (Fig. 4 o View Figure 4 ); endosoma of male stout, apical ends of lateral sclerites constricted, dorsal sclerites distinctly weakly sclerotized, translucent and curved, secondary ventral sclerite slender, accessory sclerite absent (Fig. 4 t, u View Figure 4 ); proctiger of female broad, diamond-shaped (Fig. 4 l View Figure 4 ).

Comparative notes.

Velia ( Cesavelia) yiliangensis sp. nov. is most similar to V. sinensis in appearance. It can be distinguished from other species of Cesavelia by the following characters: the absence of the accessory sclerite in the male endosoma distinguishes this species from V. tomokunii , V. championi , and V. mitrai (Fig. 4 t, u View Figure 4 ); the shape of the male proctiger (Fig. 4 k View Figure 4 ) distinguishes this species from V. bui , V. longiconnexiva , V. anderseni , V. laticaudata , and V. yunnana ; and the entire connexiva with large, bright yellow stripes in both sexes, and two less prominent teeth near the sub-apical prominent tooth on the ventral side of the male metafemur (Figs 1 f View Figure 1 , 3 c View Figure 3 ), distinguish this species from V. sinensis and V. tonkina . The extensor sides of the meso- and metatibia without long, erect setae distinguish this species from V. steelei . The large, bright yellow stripes along the entire connexiva in both sexes distinguish it from other new species in this study (Fig. 2 e, f, k, l View Figure 2 vs. Fig. 2 a – d View Figure 2 , 2 g – j View Figure 2 ).

Description.

Apterous male ( holotype). Measurements. Body: length 6.47 (6.43–6.47), width 1.82 (1.82–2.02). Head: length 0.58, width: 1.11. Antenna: 4.59 (1.49 + 1.00 + 1.01 + 1.09), length of antennal segment I about 1.34 times head width. Pronotum: width about 1.14 times its length (length 1.40, width 1.60). Lengths of leg segments (femur: tibia: tarsus (tarsal segment I + segment II + segment III )): fore leg: 2.07: 2.03: 0.74 (0.07 + 0.20 + 0.47); middle leg: 2.90: 3.15: 1.85 (0.09 + 1.00 + 0.76), length of mesotarsus II about 1.32 times length of mesotarsus III; hind leg: 2.80: 3.30: 1.67 (0.09 + 0.89 + 0.69), maximum width of metafemur: 0.42, length of metatarsus II about 1.29 times length of metatarsus III.

Color (Figs 1 f View Figure 1 , 2 k, l View Figure 2 ). Body mainly brown, with scattered silvery pubescence. Pronotum with a row of black punctures near anterior margin and other punctures scattered on posterior lobe. Median part of posterior pronotal lobe pale brown. Sides of abdomen dark brown, with large, bright yellow stripes along entire connexiva; median parts of mediotergites with some dark orange marks, in another male brighter. Silvery pubescence usually distinctly denser on anterolateral corners of pronotum, lateral corners of metanotum, lateral parts of abdominal mediotergites II, V – VI, sparse on abdominal mediotergites I, III – IV and sternites.

Structure. Body relatively large, covered with dense, short pubescence. Head (Figs 1 f View Figure 1 , 2 k, l View Figure 2 ): triangular, almost perpendicular to thorax, without deflection; anteclypeus and postclypeus with dense, peg-like setae; antennal sockets prominent, antennal segment I much longer than head width, slightly thicker than antennal segments II – IV. Thorax (Figs 1 f View Figure 1 , 2 k, l View Figure 2 ): pronotum slightly wider than length, posterior margin of pronotum broadly rounded, lateral parts of pronotum distinctly constricted at mid-length ,, middle part slightly raised and lateral parts of anterior pronotal lobe concave; mesonotum completely hidden beneath pronotal lobe and hind part of metanotum visible in dorsal view; lateral evaporatoriums slender, with a cluster of suberect, thick setae on each side; legs mainly with decumbent or suberect setae, tarsi of fore legs short, tarsi of middle and hind legs long and slender; profemora moderately incrassate, slightly curved and contracted subapically; mesofemora medially slender; metafemora (Figs 1 f View Figure 1 , 3 c View Figure 3 ) relatively slender, ventrally with two rows of small teeth and two prominent long teeth, the sub-apical tooth stouter than the sub-basal one, two long less prominent small teeth present near the sub-apical prominent tooth, are long, metatibiae ventrally with two rows of small spines. Abdomen (Figs 1 f View Figure 1 , 2 k, l View Figure 2 ): relatively slender; mediotergite I concave laterally, mediotergites II – VII almost flat; connexiva moderately raised, almost parallel hardly converging, connexival spines very short, sharp, caudally pointed; abdominal segment VIII (Fig. 4 e, f View Figure 4 ) relatively stout, ventrally concave in lateral view, posteriorly with short, dense setae, posterodorsal margin medially emarginate. Genital segments (Fig. 4 k, o, t, u View Figure 4 ): relatively large and visible in vitro; proctiger (Fig. 4 k View Figure 4 ) shield-shaped, posterior margin rounded, posteriorly with short, sparse setae; paramere (Fig. 4 o View Figure 4 ) relatively slender, strongly curve, with thick setae on external side, apices sharp; endosoma (Fig. 4 t, u View Figure 4 ) stout, apical ends of lateral sclerites slightly constricted, dorsal sclerites weakly sclerotized, translucent and curved, secondary ventral sclerite slender, accessory sclerite absent.

Apterous female. Measurements. Body: length 6.33–6.80, width 2.13–2.27. Head: length 0.62, width: 1.07. Antenna: 4.26 (1.40 + 0.93 + 0.93 + 1.00), length of antennal segment I about 1.31 times head width. Pronotum: width about 1.34 times its length (length 1.33, width 1.78). Lengths of leg segments (femur: tibia: tarsus (tarsal segment I + segment II + segment III )): fore leg: 2.10: 1.95: 0.72 (0.09 + 0.16 + 0.47); middle leg: 2.83: 3.17: 1.73 (0.09 + 0.91 + 0.73), length of mesotarsus II about 1.25 times length of mesotarsus III; hind leg: 2.70: 3.30: 1.52 (0.09 + 0.80 + 0.63), length of metatarsus II about 1.27 times length of metatarsus III.

Color (Figs 1 e View Figure 1 , 2 e, f View Figure 2 ). Similar to apterous male with following exception: in some females, bright yellow stripes along connexiva much wider than in male (Fig. 2 e View Figure 2 ). Mediotergites of some females exhibit brighter yellow coloration. Silvery pubescence denser on lateral parts of mediotergites I and III (Fig. 2 e View Figure 2 ).

Structure. Body slightly larger than apterous male. Head (Figs 1 e View Figure 1 , 2 e, f View Figure 2 ): Similar to apterous male. Thorax (Figs 1 e View Figure 1 , 2 e, f View Figure 2 ): similar to apterous male with following exceptions: profemora much slender; metafemora more slender, ventrally with two rows of small spines on each side, metatibiae ventrally without any spines or teeth. Abdomen (Figs 1 e View Figure 1 , 2 e, f View Figure 2 ): similar to apterous male with following exceptions: relatively stout; connexiva curved, gradually convergent towards abdominal apex, connexival spines absent. Genital segments: gonocoxae and gonapophyses semi-membranous, rami strongly sclerotized; proctiger (Fig. 4 l View Figure 4 ) broad, diamond-shaped, posteriorly with short, sparse setae.