Aeternus ninhbinhensis, Dietrich & Nguyen & Pham, 2020

Dietrich, Christopher H., Nguyen, Huong T. T. & Pham, Hong Thai, 2020, New genera, new species and new records of leafhoppers (Hemiptera: Cicadellidae) from Vietnam, Zootaxa 4877 (2), pp. 241-273 : 244-246

Aeternus ninhbinhensis n. sp.

( Figures 1 O–W)

Description. Length of male 5.0 mm. Head with crown bright orange with pair of oblique crescent-shaped clear areas submedially on disc, anterior margin yellow medially; face mostly pale yellow except large black macula on gena below eye and border of lorum fuscous. Pronotum light brown with indistinct orange band along posterior margin. Exposed part of mesonotum and scutellum bright orange except basal triangles yellow. Forewing clavus with basal patch and commissural margin bright orange, remainder of clavus and corium light brown except costal margin with wide yellow fenestra near midlength partially bordered with dark brown and diffuse brown transverse band at apex. Mesosternum fuscous, remainder of venter including legs yellow.

Front femur with AM1 near midheight of anterior surface, row IC with 5 long, stout setae, AV with basal setae absent; tibia rows AD and PD with 1 and 4 macrosetae, respectively, AV with numerous macrosetae, PV with single short preapical seta. Hind tibial formula PD:AD:AV 20:11:16; first tarsomere pecten with 3 platellae.

Male pygofer incised to near base dorsally, lobe with posterodorsal margin acutely angulate. Segment X elongate, more than twice as long as wide and well sclerotized. Subgenital plate with lateral preapical row of 5–7 macrosetae in addition to numerous long, fine setae, lateral margin weakly convex. Connective with stem longer than arms, partly fused to base of ventral aedeagal process. Style preapical lobe relatively large, rounded; apophysis relatively slender, tapered, nearly straight, with ventromesal tooth near midlength, denticuli indistinct. Aedeagus with preatrium slender and straplike in lateral view, ventral end forming right angle with elongate nearly straight, slender process, process divided longitudinally near midlength with two distal branches closely appressed to each other, only slightly divergent and acuminate; aedeagal shaft arising from dorsal part of boatlike atrium, slender through most of length, with median longitudinal ventral groove, apex curved slightly anterodorsad; gonopore preapical on posterior surface.

Etymology. The species is named for the province of the type locality.

Material examined. Holotype male, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance, 20.2501ºN 105.7145ºE 156m, 5 July 2019, C.H.Dietrich, Hg. vapor light, VN19-1-5 ( VNMN).

Notes. This species resembles the type species of the genus, A. hieroglyphicus Distant , in overall shape and color pattern but differs in having the pale markings of the dorsum bright orange instead of yellow. The male genitalia resemble those of the type species but segment X is much more elongate (relatively short in A. hieroglyphicus ), the apex of the pygofer lobe is distinctly angulate, the subgenital plate is narrower with a nearly straight lateral margin and lateral macrosetae, the style apophysis is much more slender and lacks obvious denticles (broad and distinctly denticulate in A. hieroglyphicus ), and the ventral processes of the aedeagus are fused to each other basally and nearly straight (not sinuate preapically as in A. hieroglyphicus ). A male specimen from “Haut Mekong” (presumably Laos) collected in 1918 and deposited in The Natural History Museum, London, appears to be identical to the holotype from Vietnam. Photographs of this specimen by J. N. Zahniser are on the 3I website: http://dmitriev. speciesfile.org/taxahelp.asp?hc=26659&key=Erythroneura&lng=En

Bambusana biflaka Li, 2011 in Li et al. 2011

Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao , 21.4561ºN 105.6501ºE, 983m, 10–13 July 2019, C.H.Dietrich, Malaise trap in forest opening, VN19-7-2; 1 male, 1 female, VIETNAM: Vinh Phuc, Tam Dao summit trail, 21.4622ºN 105.6473ºE, 970m 11 July 2019, C.H.Dietrich, sweeping forest understory, incl. bamboo, VN19- 6-1 ( INHS) .

Notes. This bamboo-feeding species was previously recorded from China. It is here recorded from Vietnam for the first time.

Hamulotettix ungulatus Dai & Zhang, 2011

( Figures 1 X–BB, 11E)

Description of female. Length 10.5 mm. Closely resembling male overall but slightly larger. Sternite VII more than twice length of sternite VI, lateral margins roundly tapered, apex pointed with acute median notch. Ovipositor protruding only slightly beyond pygofer; first valvula elongate, slender, dorsal sculpture strigate to indistinctly concatenate, extended to margin. Second valvula elongate, slender and nearly uniform in width throughout; dorsal margin with 10 distinct closely-spaced obliquely triangular teeth.

Material examined. Male, VIETNAM: Ninh Binh, Cuc Phuong NP, trailhead to Cave of Prehistoric Man 20º17.574’N 105º40.015’E 248 m, 22 May 2012, K. Hill and D. Marshall, at lights. 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP center 20.3522ºN 105.5983ºE, 370m, 5 July 2019, C.H.Dietrich, sweeping along rd., VN19- 2-1 ( INHS) .

Notes. The male specimen examined from Vietnam appears to be identical to the holotype from Yunnan illustrated by Dai & Zhang (2011) in nearly all respects but lacks an unpaired hooklike ventral process on abdominal segment X. Thus, the specimens from Vietnam may represent a different species from the Chinese holotype, but additional collecting is needed to determine the degree to which male segment X varies among specimens. This is the first record of the species from Vietnam. The female is described here for the first time.

Tambocerus dentatus Qu & Dai, 2014

( Figure 11F )

Material examined. 6 males, 1 female, VIETNAM: Ninh Binh, Cuc Phuong NP, ca. entrance, 20.2501ºN 105.7145ºE 156m, 3 July 2019, C.H.Dietrich, Hg vapor light in forest, VN19-1-2 ( INHS) .

Notes. This species was described from southern China (Guizhou). It is here recorded from Vietnam for the first time.

Tambocerus elongatus Shen, 2008 in Shen, Shang & Zhang, 2008

Material examined. 1 male, VIETNAM: Vinh Phuc, Tam Dao , 21.4577ºN 105.6494ºE, 965m, 10 July 2019, C.H.Dietrich, Hg vapor light, VN19-10-1 ( INHS) .

Notes. This species is common and widespread in China but apparently has not previously been recorded from outside that country. It is here recorded from Vietnam for the first time.

Figures

FIGURE 1. Deltocephalinae, Athysanini. A–L, Abrus digitatus sp. n., holotype male: A–B, lateral and dorsal habitus; C–D, genital capsule, lateral and ventral views; E, pygofer and anal tube, lateral view; F, valve and subgenital plates, ventral view; G–H, genitalia, ventral and lateral views; I, aedeagus, posterior view. J–N, A. digitatus female: J, abdominal sternite VII; K, first valvula, L, detail of same; M, second valvulae, N, detail of same. O–W, Aeternus ninhbinhensis sp. n., holotype male: O–P, lateral and dorsal habitus; Q–R, genital capsule, lateral and ventral views; S, pygofer and anal tube, lateral view; T, valve and subgenital plates, ventral view; U–V, genitalia, ventral and lateral views; W, aedeagal shaft and atrium (preatrium and ventral processes not shown), posterior view. X–BB, Hamulotettix ungulatus Dai & Zhang, female: X, sternite VII, ventral view; Y–Z, distal part of first valvula; AA–BB, distal part of second valvulae.

FIGURE 11. Live photos of new species and other newly recorded Cicadellidae from Vietnam. A, Atkinsoniella albipenna Yang, Meng & Li; B, Atkinsoniella xanthovena Yang & Li; C, Bothrogonia hamata Yang & Li; D, Abrus digitatus n. sp.; E, Hamulotettix ungulatus Dai & Zhang; F, Tambocerus dentatus Qu & Dai; G, Gurawa minorcephala Singh-Pruthi; H, Maiestas remigia Zhang & Duan; I, Drabescoides bispinosa n. sp.; J, Tenompoella vietnamensis n. sp.; K, Hishimonoides bougainvilleae Viraktamath et al.; L, Uzelina (Uzelina) vietnamensis sp. n.; M, Hochiminhus tamdaoensis n. sp.; N, Platyretus gangeticus Viraktamatn & Webb; O, Scaphoideus shovelaedeagus Li & Song; P, Scaphoideus maai Kitbamroong & Freytag; Q, Sychentia vietnamensis n. sp.; R, Varta lunata n. sp.; S, Stenotortor subhimalaya Viraktamath & Wesley; T, Bundera onukiiformis n. sp.; U, Carinata arcuata n. sp.; V, Sophonia lushana Kuoh; W, Traiguma hamocauda n. sp.; X, Multinervis guanxiensis Li & Li; Y, Signoretia aureola Distant; Z, Signoretia tamdaoensis n. sp.