A new erythroneurine genus, Dentaneura gen. nov., and a new species, Dentaneura henanensis sp. nov. (Hemiptera: Cicadellidae: Typhlocybinae) from Henan Province, China, is described. Detailed morphological descriptions and illustrations of the new genus and species and a key to the genera of Erythroneurini of China are given.
Erythroneurini, the largest tribe in the subfamily Typhlocybinae, is distributed in all 6 faunal regions, and worldwide comprises 193 genera and more than 1,840 species. In China, 50 genera and more than 280 species have been reported (Dmitriev 2016). In the course of studying the Chinese Erythroneurini, a new genus and species, Dentaneura henanensis gen. et sp. nov., was discovered and is described in this paper. A key to the genera of the tribe Erythroneurini in China is provided.
Materials and Methods
The type specimens were collected by sweep net in Aug 2008 in the Baiyun Mountain scenic area in Henan Province. Morphological terminology used in this work follows Dietrich (2005) and Song & Li (2013). Habitus photos were taken using a KEYENCE VHX-2000 digital microscope. The body measurements are from the apex of vertex to the tip of forewing. An Olympus SZX7 dissecting microscope was used for viewing and an Olympus CX41 stereoscopic microscope for drawing. The type-series of the new species were deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).
Head narrower than pronotum. Crown fore margin weakly produced medially, with pair of preapical spots. Face with frontoclypeus long and narrow, anteclypeus relatively broad. Pronotum with medial markings. Scutellum with basal triangles obvious. Forewing long and narrow, clavus with continuous vitta parallel to suture.
Male: Second sternal apodemes (2S) bladelike, extending 4th sternite.
Pygofer side broad, with single large dorsal macroseta, hind margin rounded, basolateral area without setae in distinct group, microsetae and microtrichia near caudal margin of lobe well developed. Pygofer dorsal appendage movably articulated, bifurcate near base, extended beyond pygofer apex, slightly curved downward in lateral view. Ventral appendage absent. Subgenital plate (Fig. 8) short, not extended to apex of pygofer lobe, expanded at subbase, with 3 macrosetae along upper margin subbasally and 4 macrosetae forming row on lateral surface, upper marginal microsetae absent, with 2 strong teethlike setae apically, some microsetae scattered on distal and ventral area. Style (Fig. 9) long and slender, footlike apically. Preapical lobe small but distinct, hooklike at apex. Connective (Fig. 12) Y-shaped, central lobe present. Aedeagus (Fig. 11) simple, with pair of short processes apically. Aedeagal shaft equal to or slightly shorter than preatrium. Preatrium expanded at base. Dorsal apodeme small in lateral view. Gonopore terminal, ventrad.
Species in this tribe feed on trees, shrubs, and grasses. Some species harm economic crops including apple, grape, cherry, hawthorn, pear, peach, mulberry, maple, and Lonicera. The body is small, the forewing and head often have bright coloration and distinct patterns.
The new genus resembles Arboridia (Zachvatkin 1946) in the following morphological characteristics: crown fore margin weakly produced medially, with paired preapical spots, scutellum with dark basal triangles. It is also somewhat similar to Tautoneura Anufriev, 1969 in the Y-shaped connective, with median anterior lobe, but can be distinguished from the formers by the pygofer with 1 dorsal macroseta, without macrosetae in group at basal lower angle; the subgenital plate very short, with 3 macrosetae at upper margin subbasally and 2 robust teethlike setae at apex, some rigid microsetae along upper margin disappeared; connective median anterior lobe present.
The generic epithet is derived from the noun “denta” and the suffix “-neura” in view of the subgenital plate with 2 strong teethlike setae at apex. The gender is feminine.
Updated Key to Genera of Erythroneurini from China (Modified from Song & Li 2014)
1.— Hind wing submarginal vein reduced, not fused with Cu1 vein 2
1′.— Hind wing submarginal vein fused with Cu1 vein 3
2.— Head, thorax, and forewing with numerous spots and markings; pygofer with dorsal appendage only Diomma Motschulsky
2′.— Head, thorax, and forewing without spots and markings; pygofer with dorsal and ventral appendage Watara Dworakowska
3.— Anal tube with hooks or processes 4
3′.— Anal tube without hooks or processes 7′
4.— Pygofer lobe with several enlarged setae at basolateral angle 5
4′.— Pygofer lobe without several enlarged setae at basolateral angle 7
5.— Pygofer microtrichia well developed Raabeina Dworakowska
5′.— Pygofer microtrichia absent or inconspicuous 6
6.— Pygofer ventral appendage absent Gladkara Dworakowska
6′.— Pygofer ventral appendage present Thailus Mahmood
7.— Pronotum with single diamond-shaped impression medially 8
7′.— Pronotum without diamond-shaped impression medially 11
8.— Pygofer lobe with 1–2 dorsal macrosetae Sanatana Dworakowska
8′.— Pygofer lobe without dorsal macrosetae 9
9.— Aedeagus fused to connective Andrabia Ahmed
9′.— Aedeagus articulated to connective 10
10.— Pygofer lobe with appendage Thaia Ghauri
10′.— Pygofer lobe without appendage Niedoida Dworakowska
11.— Pygofer lobe with sparse long fine setae 12
11′.— Pygofer lobe without sparse long fine setae Kaukania Dworakowska
12.— Forewing with irregular red dots Tautoneura Anufriev
12′.— Forewing without irregular red dots 13
13.— Pygofer without dorsal appendage Thapaia Dmitriev & Dietrich
13′.— Pygofer with dorsal appendage 14
14.— Pygofer dorsal appendage movably articulated at base 15
14′.— Pygofer dorsal appendage not movably articulated at base Gambialoa Dworakowska
15.— Pygofer with oblique dorsolateral internal ridge Kapsa Dworakowska
15′.— Pygofer without oblique dorsolateral internal ridge 16
16.— Pygofer lobe microtrichia well developed Chagria Dworakowska
16′.— Pygofer lobe microtrichia disappeared or unobvious Frutioidia Zachvatkin
17.— Forewing 4th apical cell extended to distal margin 18
17.— Forewing 4th apical cell not extended to distal margin 22
18.— Style apex bifurcate Irenaneura Cao, Huang & Zhang
18′.— Style apex unbranched 19
19.— Pygofer inner side with 2 pairs of well pigmented separate lobes Variolosa Cao & Zhang
19′.— Pygofer inner side without lobes 20
20.— Preatrium of aedeagus with single large atrial process Singapora Mahmood
20′.— Preatrium of aedeagus without atrial process 21
21.— Pygofer lobe with a strong appendage at caudal margin medially Fractata Song & Li
21′.— Pygofer lobe without any appendage at caudal margin Dentaneura gen. nov.
22.— Pygofer basolateral with macrosetae in distinct group 23
22′.— Pygofer basolateral without macrosetae in group 26
23.— Apex of scutellum without black spot 24
23′.— Apex of scutellum with single black spot 25
24.— Style apex truncate Coloana Dworakowska
24′.— Style apex slender Ossuaria Dworakowska
25.— Subgenital plate with lamelliform process on inner lateral surface near apex and several long white fine setae at apex Plumosa Sohi
25′.— Subgenital plate without lamelliform process on inner lateral surface near apex, with several short stout setae at apex Davmata Dworakowska
26.— Hind wing with truncate apex 27
26′.— Hind wing with rounded apex 29
27.— Hind wing with RA vein Erythroneura Fitch
27′.— Hind wing without RA vein 28
28.— 2S abdominal apodemes small, narrow, not exceeding 3rd sternite Gredzinskiya Dworakowska
28′.— 2S abdominal apodemes large, broad, exceeding 3rd sternite Erythroneura Fitch
29.— Pygofer with dorsal and ventral appendage 30
29′.— Pygofer with dorsal or ventral appendage only or without appendage 31
30.— Pygofer lobe with 1 or more dorsal macrosetae Salka Dworakowska
30′.— Pygofer without dorsal macorsetae Alnetoidia Dlabola
31.— Crown fore margin weakly produced, rounded apically 32
31′.— Crown fore margin strongly produced, angulate medially 36
32.— Pronotum with diamond-shaped impressions medially 33
32′.— Pronotum without diamond-shaped impressions medially 34
33.— Pygofer without dorsal appendage Pseudothaia Kuoh
33′.— Pygofer with dorsal appendage Matsumurina Dworakowska
34.— Scutellum with single black medial spot Elbelus Mahmood
34′.— Scutellum without single black medial spot 35
35.— Style preapical lobe cheliform Rufitidia Dworakowska
35′.— Style preapical lobe lamellalike Yakuza Dworakowska
36.— Style apex long and slender, tapering apically 37
36′.— Characters not as above 40
37.— Pygofer often with 1 or more dorsal macrosetae Kabakra Dworakowska
37′.— Pygofer often without dorsal macrosetae 38
38.— 3S apodemes present and distinctive Saccata Cao & Zhang
38′.— 3S apodemes absent 39
39.— Connective central lobe absent Kusala Dworakowska
39′.— Connective central lobe present Mitjaevia Dworakowska
40.— Pygofer with dorsal appendage 41
40′.— Pygofer without dorsal appendage 42
41.— Pygofer with single macroseta arising from caudal margin medially Laciniata Song & Li
41′.— Pygofer without macroseta arising from caudal margin Duanjina Kuoh
42.— Connective with central lobe 43
42′.— Connective without central lobe 46
43.— Pygofer lobe with numerous, conspicuous long fine setae Zygina Fieber
43′.— Pygofer lobe without numerous, conspicuous long fine setae 44
44.— Pygofer with oblique dorsolateral internal ridge 45
44′.— Pygofer without oblique dorsolateral internal ridge Lectotypella Dworakowska
45.— Vertex without spots Motaga Dworakowska
45′.— Vertex often with pair of preapical spots or large median apical spot Empoascanara Distant
46.— Style apex with 3 points 47
46′.— Style apex truncate and expanded 48
47.— Forewings with continuous zigzag pattern Ziczacella Anufriev
47′.— Forewings without continuous zigzag pattern Arboridia Zachvatkin
48.— Pygofer with macrosetae at basolateral angle 49
48′.— Pygofer without macrosetae at basolateral angle Seriana Dworakowska
49.— Aedeagus with pair of long atrium processes; hindwing without RA vein Qadria Mahmood
49′.— Aedeagus without atrium processes; hindwing with RA vein Anufrievia Dworakowska
Dentaneura henanensis Song, Li & Dai sp. nov. (Figs. 1–12)
China: Henan Province, Mt. Baiyun.
Body length: ♂, 3.1–3.2 mm.
Vertex (Figs. 1 and 6) brownish yellow, with pair of milky irregular preapical spots and with longitudinal milky stripes along inner sides of eyes. Eyes (Figs. 1, 2, 3) brown black. Pronotum (Figs. 1, 6) whitish yellow, with median and posterior margin dark. Face (Fig. 3) brown yellow, frontoclypeus long and narrow, with 2 large milky white markings apically; anteclypeus broad, whitish yellow. Forewing (Figs. 1 and 4) pale, with 1 continuous light brown vitta parallel to clavus suture.
Male: Second sternal apodemes (2S) (Fig. 5) bladelike, extended to 4th sternite.
Pygofer side (Fig. 7) broad, with 1 dorsal macroseta, numerous microtrichia scattered at caudal area. Pygofer dorsal appendage movably articulated, bifurcate at base, dorsal branch longer than ventral branch, extended beyond apex of lobe. Subgenital plate (Fig. 8) with 3 marginal macrosetae at base, 4 macrosetae on lateral surface, and 2 robust teethlike setae at apex. Style (Fig. 9) with apex inverted-footlike, preapical lobe small, with apex hooklike. Connective (Fig. 12) Y-shaped, with stem truncate apically, central lobe much short than lateral arms. Aedeagus (Figs. 10 and 11) with paired short apical processes, preatrium little longer than aedeagal shaft, dorsal apodeme small in lateral view, gonopore apical on ventral surface.
HOLOTYPE: 1 male; CHINA: Henan Prov., Mt. Baiyun (33.6° N, 111.83° E), 1,300–1,400 m, 17-VIII-2008, coll. Yuehua Song and Can Li. PARATYPE: 1 male, same data as Holotype.
China (Henan Province).
The new species can be distinguished from other species with its subgenital plate extremely short, with 3 macrosetae along upper margin sub-basally and 2 strong toothlike setae apically; pygofer lobe with a single dorsal macroseta.
The specific name refers to the type-locality.
The study was partly supported by the Key Project in the National Key Technology R&D Program of China during the Twelfth Five-Year Plan Period (2011BAC09B01-08), the National Natural Science Foundation of China (31301866), the Special Foundation for the Excellent Youth Science and Technology Scholars of Guizhou Province (Qian Ke He Ren Zi, No.  17), the Natural Science Research Project of Education Department of Guizhou Province (Qian Jiao He KY Zi, No.  357), and the Chinese Government Scholarship Sponsoring Study Abroad (201308525113).