Yaeprimus balteatus Han et Tang, sp. n.
Material examined (all collected H.Q. Tang, deposited EJNU, unless stated otherwise). Holytype [EJNU–Ershan150910001], male, CHINA: Guangdong Province, Guangzhou City, Ershan county, 23°14′ N, 113°26′ E, 10.ix.2015, light trap; Paratype, 1 male[EJNU–Ershan150320001] and 1 reared pharate female [EJNU–Ershan150521001] as previous, except 20.iii.2015 (emerged 21.v.2015); 1 male [EJNU– Shantou 151014001], Guangdong Province, Shantou City, Chaonan District, Jinxi Reservoir Scenic spot, Fengzai Village, 23°10′ N 116°18′ E, alt. 210 m, 14.x.2016, light trap (ZSM); 1 male[NKU–XL1460], Hainan Province, Changjiang County, Bawangling National Nature Reserve, 19°07′ N, 109°05′ E, 13.iii.2016, light trap, B.J. Sun (NKU); 2 males[NKU–XL1509, NKU–XL1510], Hainan Province, Shuiman County, Wuzhi Mountain., 18°45′ N, 109°36′ E, sweep net, 2.iii.2016, C. Song (NKU).
Etymology. The new name ‘balteatus’, derived from Latin (meaning belted), referring to the color bands on the abdomen and leg.
Total length, 2.50–2.95, 2.70 (5) mm. Wing length, 1.30–1.60, 1.45 (5) mm.
Coloration (Figure 4
A,B and Figure 5
A). Generally brown with some pattern in legs and abdomen. Legs were yellow, except for dark brown all femur and complete mid tibia, and pale brown apex of fore and hind tibia. Fore-tarsus with brown apex and gradually brown in Ta2
, others tarsi all pale yellow (Figure 4
A,B for colorful photo). Anterolateral corners of A I, posterior half of A III and A V, and almost entire A VI–VIII dark brown. A IX was dark brown, the hypopygium with brown gonocoxite and pale yellow gonostylus.
Head. Antenna (Figure 4
C) with pale brown (approximal and distal) or brown (middle) flagellomeres, with almost dark plume. Flagellomere 1–12, 340–390, 358; flagellomere 13, 540–640, 570; AR 1.57–1.64, 1.60 (4). Palpomere lengths (in μm): 25–30, 28 (3); 25–35, 30 (3); 115–125, 120, (3); 100–124, 111 (3); 180–200, 190. Temporals were 10–12, 11. Clypeus had 14–17, 15 (5) setae. The diameter of cephalic tubercle 5 μm, bearing 3–5 small setae.
Thorax (Figure 4
D). Antepronotals 1–2; dorsocentrals 6–9, 6, usually alternately accessorized with 3–5 tiny pits; acrostichals 10–16, 14 (3) arranged in robust two rows, ending in anterior 1/3 before the hump; prealars 3–4, 3, supraalars 1. Scutellum had 7–8 setae, in single row. Tiny trans-oval humeral pits present.
Wing (Figure 4
E). VR 1.09–1.22, 1.16 (5); R without seta; R1
with 0–1 seta; R4+5
with 1–2 setae in extreme apex. Squama bare.
Legs (Figure 4
F and Figure 5
B–D). Fore tibia with a conical scale bearing a slender, distal-hooked spur, 25–30 (2) μm long. Mid tibia with two separated combs, one bearing a distal-hooked spur, 23–37, 28 (3) μm long, another comb with even comb teeth, unspurred; hind tibia with two separated combs, the small one bearing a distal-hooked spur, 25–40, 35 μm (5) long, and the large one bearing 1–2 straight spurs, 12.5–20, 16.5 (5) long. LR1
1.30–2.19 (2); LR2
0.58–0.71, 0.65 (3); LR3
0.77–0.83, 0.80 (3). BV1
5.31–5.88, 5.54(3); BV3
2.44–2.61; 2.54 (3). SV1
3.20–4.06, 3.54 (3); SV3
2.59–2.70, 2.63(3). BR1
3.57–4.00, 3.78 (3); BR3
Hypopygium (Figure 4
H and Figure 6
A,B). T IX with a row of 4–6 setae, arising from fairly large microtrichia-free pit, without distinct lateral group. Distal margin with 3–5 setae both in the dorsal and ventral surfaces. Gonocoxite 115–132, 126 (4) μm long. Gonostylus relatively short, 35–48, 43 (4) μm long, distal portion with 6–10 inner–toward setae, the longest one about 25 long. Superior volsella (Figure 6
C,D) with a base without microtrichia, bearing 2–3 inner setae from the tubercle base, distal digitus long and slender, distal curved inwardly, without inner seta. Inferior volsella slightly bullous distally, with 13–16 setae. HR 2.79–3.29, 2.97 (4); HV 5.58–7.14, 6.37 (4).
Total length ca. 3.0 mm. Cephalic tubercle absent (Figure 7
B), frontal setae small, 40 µm long, subequal to the gap between two frontal setae. The thoracic setation as in Figure 7
C, thoracic horn invisible. The abdomen (Figure 7
A) with dense spinulations in T II–IV, no clear delimitation between the anterior patch and median patch. Continuous conjunctival spinule bands present in T III and IV. The tergite II hook row continuous, short, 30% of the width of segment II, comprising ca. 20 hooks. A V–VII distorted. Comb VIII with one main tooth and three small accessory teeth. The anal lobe 140 µm long and 150 µm wide, with 20–24 taeniae, dorsal seta present.
Remarks. The new species shares the same comb pattern with Y. tropicus and reduced gonostylus with Y. isigaabeus. It can be distinguished from the other two species by the distinct scutal tubercle and anal median tergal seta arising from the common pale pit rather than sclerotized concavities. For pupa, the new species can be separated from Y. isigaabeus by the fused sub-rectangular spinulations and small point-free area in the middle area of T II–IV and conjunctives continuously.
Distribution: China (Guangdong and Hainan).
Yaeprimus isigaabeus Sasa et Suzuki
Yaeprimus isigaabeus, Sasa and Suzuki, 2000: 4; Yamamoto and Yamamoto, 2011: 228.
Yaetertius iriojekeus Sasa et Suzuki, 2000: 18, synonymized by Yamamoto and Yamamoto, 2011.
Material examined (all collected H.Q. Tang, deposited EJNU unless stated otherwise): 1 male, 1 female, CHINA: Fujian Province., Zhangzhou City, Nanjing County, a stream in Huboliao National Nature Reserve, 26°31′ N 117°18′ E, 15.xi.2012; 6 males, China: Guangdong Province, Guangzhou City, Zengcheng District, Shuimei County, Lan stream, 23°21′ N, 113°58′ E, alt. 148, 29.xi.2018, light trap; 1 Pe, Guangdong Provinve, Guangzhou City, Conghua District, Xinlian village, 23°47′ N, 113°59′ E, alt. 240 m, hand net, 18.x.2014; 1 male, CHINA: Hainan Province, Baoting County, Xian’an Shilin scenic spot, 18°36′ N 109°25′ E, alt. 602 m, 14.ii.2015; 2 Pe, Guangxi Province, Congzuo City, Detian waterfall, 22°51′ N, 106°44′ E, alt. 380 m, 24.ii.2012, W. Xia and C.B. Duan; 1 male, CHINA: Yunnan Province, Xishuangbanna Prefecture, Jinghong City, Mengyang County, Xishuangbanna Prefecture, Wild Elephant Valley, 22°10′ N, 100°51′ E, 900 m asl., sweep net; 1Pe, Yunnan Province, Xishuangbanna Prefecture, Jinghong City, Menglun Town, Luosuo River, 21°55′ N 101°17′ E, 22.iii.2019.
Additional compared specimens: 2 males, JAPAN: 2 males, Iriomote Island, Funaura, one slide 24. iii. 2000, another 19.xi.2001, M. Yamamoto.
Conforms mostly to Yamamoto and Yamamoto [2
], with the following supplementation and emendation:
Total length 1.8–3.2 mm, wing length 1.1–1.8 mm. AR 1.15–1.50. LR1 1.57–2.36. Distinct humeral pit present.
Anal tergite with two pairs or three pairs of median setae, arising from a heavily pigmented field, grouped laterally. Superior volsella base with 1–2 inner seta, without microtrichia, digitus with a basal inner seta, and distal elongated, with a ventro–lateral ledge apically.
Cephalic tubercle absent, frontal setae reduced, subequal to the gap between two setae. Dorsal seta of anal lobe present.
Distribution. Japan (Ishigaki Island and Iriomote Island); China (Fujian, Guangdong, Hainan, Guangxi, Yunnan).
Yaeprimus tropicus comb. n.
Lunditendipes tropicum Harrison 2000: 224
Material examined (all observed by Helen Barber–James, confirmed with authors by the shared photos).
Holotype (CCA. 40G). M, Zimbabwe: Lower of Lundi River, 21°20′ S 32°15′ E, 25.iv.1962, A.D. Harrison; two paratype (GEN. 265AL; GEN. 268AL), Zimbabwe: Ndumu Game Rivers, KwaZulu–Natal, 26°53′ S 32°18′ E, 19.xi.1959, A.D. Harrison.
This species has been described by Harrison [4
]: some emendations and additional characters are given here.
AR 1.2–1.5, LR 2.1–2.3; thorax (Figure 8
A) slight hump, without scutal tubercle, small pale humeral pit present. Mid (Figure 8
B) and hind tibia (Figure 8
C) with two separated combs, the small combs with long–hooked spurs, the large comb without spur in the mid tibia, with 1–2 outstanding straight spurs in the hind tibia. Pulvilli present. Abdomen II–VIII with two regular rows of setae, T VII (Figure 8
D–F) slightly tapered anteriorly. Location of anal tergite median setae (Figure 8
D–G) as that in Y
, two pairs of strong setae arising from the heavily pigmented areas, with variation one side two setae, another side three. Apart from those two pigmented areas, an isolated additional seta may present, arising directly from the cuticle. Superior volsella basal (Figure 8
H) with two inner basal setae arising from tubercles, digitus bare, with a weak ventro–lateral ledge apically. Gonostylus is not reduced, normal (Figure 8
Remarks. Y. tropicus was characteristic by having a normal gonostylus and a weak tergal band.
Distribution. Zimbabwe (Lundi River); South Africa (KwaZulu–Natal).