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Research Article
Description of two new species of the leafhopper genus Pediopsis Burmeister (Hemiptera, Cicadellidae, Eurymelinae, Macropsini) from China
expand article infoHu Li§, Ran-Huai Dai§, Michael D. Webb|
‡ Shaanxi University of Technology, Hanzhong, China
§ Institute of Entomology of Guizhou University, Guiyang, China
| The Natural History Museum, London, United Kingdom
Open Access

Abstract

Two new leafhopper species of Pediopsis Burmeister, Pediopsis albopicta Li & Dai, sp. nov. from Hunan and Guizhou provinces of central China and Pediopsis pianmaensis Li & Dai, sp. nov. from Yunnan Province of southwestern China, are described and illustrated. Ambiguity in the original description of P. bannaensis Yang & Zhang is discussed, and figures of the female holotype of P. femorata Hamilton are provided for the first time. A checklist and key to Chinese species of Pediopsis are also given.

Keywords

Auchenorrhyncha, Homoptera, morphology

Introduction

The leafhopper genus Pediopsis Burmeister, belonging to the tribe Macropsini of the subfamily Eurymelinae (sensu Dietrich and Thomas 2018), was established by Burmeister (1838) as a subgenus of Bythoscopus Germar; it was subsequently raised to the level of genus and Jassus tiliae Germar, 1831 was designated as its type species by Kirkaldy (1903). Many authors (Anufriev 1971; Hamilton 1980; Tishechkin 1997; Cai et al. 2005; Dai and Li 2013; Yang and Zhang 2015; Yang et al. 2016) have described new species or proposed new combinations in the genus worldwide, increasing the number of species to 19, of which six are known from China (Dai et al. 2018). In this paper, two new species of Pediopsis from China are described, ambiguity in the original description of P. bannaensis Yang & Zhang is discussed, and the status of P. femorata Hamilton is commented on. Figures of the female holotype of P. femorata for the first time are provided. In addition, a checklist and key to the Chinese species of Pediopsis are given.

Materials and methods

Specimens studied were collected by netting. External morphology was observed under Olympus SZX7 and BX43 microscopes. Male terminalia preparations were macerated in a boiling solution of 8% NaOH for ~ 5 min. Habitus images of adults were obtained by using a KEYENCE VHX-1000 system. Genitalia drawings were created and edited utilizing Adobe Illustrator CS6 and Photoshop CS6 based on line drawings of specimens.

The higher classification and morphological terminology used in this work follows Hamilton (1980) and Dietrich and Thomas (2018). Body length is measured from the apex of the head to the end of the folded forewings and presented in millimeters (mm).

Type specimens of the new species and other material examined are deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).

Systematics

Pediopsis Burmeister

Bythoscopus (Pediopsis) Burmeister, 1838: 11.

Pediopsis Kirkaldy 1903: 214; Hamilton 1980: 902.

Type species

Jassus tiliae Germar, 1831, by subsequent designation of Kirkaldy (1903).

Distribution

Palaearctic, Oriental, Nearctic, and Australian regions.

Remarks

Pediopsis can be distinguished by the following combination of features: head across eyes usually distinctly narrower than pronotum, face wider than long, lora relatively large, pronotum frontally declivous and usually with strongly oblique striations, male pygofer without spines or processes, dorsal connective usually strongly developed. The traditional separation of Pediopsis from Pedionis (Hamilton 1980) is followed here, but, as more species become known, the two genera may be synonymized. The difficulty in defining Pediopsis is apparent from the fact that the genus was keyed out in two places in Hamilton’s (1980) key. At present, the most reliable feature to separate the two genera is the presence or absence of processes or spines on the ventral margin of the male pygofer (absent in Pediopsis and present in Pedionis).

Checklist to species of Pediopsis from China

P. albopicta Li & Dai, sp. nov. Figs 1–11. Distribution. China (Hunan and Guizhou provinces).

P. bannaensis Yang & Zhang, 2015: 488, figs 29–39. Distribution. China (Yunnan Province), Thailand.

P. cudraniae Cai & Wang, 2005: 206, fig. 1. Distribution. China (Shandong Province).

P. femorata Hamilton, 1980: 919; Figs 22–26. Distribution. China (Taiwan).

P. kurentsovi Anufriev, 1971: 95, figs 4–6; 1976: 133. Distribution. China (Hebei, Heilongjiang provinces), Russia.

P. ningxiaensis Dai & Li, 2013: 961, figs 22–31. Distribution. China (Ningxia Province).

P. tiliae (Germar, 1831: 14), Hamilton 1980: 903, fig. 62. Distribution. Widespread in Palaearctic region.

P. pianmaensis Li & Dai, sp. nov. Figs 12–21. Distribution. China (Yunnan Province).

Key to species of Pediopsis recorded in China

1 Fore margin of head and pronotum in dorsal view strongly arched forward (Fig. 22) P. femorata
Fore margin of head and pronotum in dorsal view moderately arched forward 2
2 Mesonotum with white tip and veins of forewings with white spots (Fig. 1); aedeagal shaft very short (Fig. 10) P. albopicta
Mesonotum without white tip and veins of forewings without white spots; aedeagal shaft short to long 3
3 Species mainly dark (Fig. 12); forewing with two subapical cells (Fig. 14) P. pianmaensis
Species mainly pale, sometimes forewing with distinct brown markings; forewings with two or three subapical cells (Fig. 4) 4
4 Dorsal connective with process near midlength or subbasally 5
Dorsal connective with process absent 7
5 Dorsal connective with well-developed process near midlength, caudodorsally twisted Y-shaped (see Yang and Zhang 2015: fig. 39) P. bannaensis
Dorsal connective with weakly developed process subbasally, straight (see Anufriev 1971: fig. 4; Dai and Li 2013: figs 31, 34) 6
6 Forewing distinctly marked with brown; aedeagal shaft slender (see Anufriev 1971: fig. 6; Dai and Li 2013: fig. 32) P. kurentsovi
Forewing weakly marked with brown; aedeagal shaft not slender (see Dai and Li 2013: fig. 29) P. ningxiaensis
7 Dorsal connective clearly twisted dorsally in lateral aspect (see Hamilton 1980: fig. 62) P. tiliae
Dorsal connective clearly twisted ventrally in lateral aspect (Fig. 16) P. cudraniae

Pediopsis albopicta Li & Dai, sp. nov.

Figs 1–11

Examined material

Holotype ♂, China: Hunan Province, Badagongshan National Natural Reserve, Tianpingshan, 5.viii.2013, collected by Hu Li. Paratypes 1 ♂, same data as holotype, except 3.viii.2013; 1 ♀, Guizhou Province, Shiqian County, Fodingshan National Natural Reserve, 15.viii.1991, collected by Xiang-Sheng Chen.

Description

Body color (Figs 1–3). Body background color black to dark brown. Head and face (Fig. 3) yellowish, with dark spots or stripes, frontoclypeus slightly milky white, eyes dark brown with reddish tinge, fading to gray; ocelli dark; apex of anteclypeus and gena black. Pronotum (Fig. 1) with anterior half dark brown, posterior half gray, striations on surface darker. Mesonotum (Fig. 1) evenly black with white tip. Forewing (Figs 1, 2) brown, with several transparent patches at midlength and subapically; veins black with clear white spots. Legs yellowish with black or brown patches.

Body appearance (Figs 1–4). Head across eyes (Fig. 1) clearly narrower than pronotum; crown short with anterior and posterior margins almost parallel. Face (Fig. 3) as long as wide across eyes, surface with clear punctures and striations, central region slightly tumid frontally, distance between ocelli relatively large, approximately 8× that from ocellus to adjacent eye. Pronotum (Figs 1, 2) broad, 2.4× wider than long, with strongly oblique striations. Mesonotum (Fig. 1) 1.5× longer than pronotum. Forewing (Figs 1, 2, 4) with three subapical and four apical cells, venation prominent.

Male genitalia (Figs 5–11). Pygofer (Fig. 5) broad basally, lobe short and stout, caudal margin truncated, slightly depressed medially, ventral margin smoothly curved, with scattered marginal setae. Subgenital plate (Fig. 5) slender, of equal width throughout length, with relatively long hair-like setae, its length as long as ventral margin of pygofer. Dorsal connective (Fig. 6) strongly developed, S-shaped, with long slender process produced on ventral margin directed caudad and twisted. Style (Fig. 7) with apophysis stout, angled dorsally at basal 1/3, gradually tapering to pointed apex, with few marginal setae. Connective as in Figs 8, 9. Aedeagus (Figs 10, 11) with basal apodeme and shaft short, the latter shorter than 1/2 length of whole aedeagus, tapered in lateral view to truncate apex, bent dorsally.

Figures 1–11. 

Pediopsis albopicta sp. nov. 1 male habitus, dorsal view 2 male habitus, lateral view 3 face 4 forewing 5 male pygofer and subgenital plate, lateral view 6 dorsal connective, lateral view 7 style, lateral view 8 connective, ventral view 9 connective, lateral view 10 aedeagus, lateral view 11 aedeagus, ventral view. Scale bars: 1 mm (1, 2); 0.5 mm (3).

Measurement

Body length (including tegmen): 4.3 mm.

Distribution

China (Hunan and Guizhou provinces).

Etymology

The specific epithet of the new species is derived from the Latin words albus (white) and picta (spot), referring to the white tip of the mesonotum and white spots on the forewing veins.

Remarks

This species can be readily separated from other congeners by the contrasting color pattern of its mesonotum, white spotted forewing veins, and different shape of the aedeagus and dorsal connective.

Pediopsis pianmaensis Li & Dai, sp. nov.

Figs 12–21

Examined material

Holotype ♂, China: Yunnan Province, Lushui City, Pianma Town, 26°0'34"N, 98°37'55"E, 26.v.2019, collected by Jia-Jia Wang and Chao Zhang.

Description

Body color (Figs 12–14). Specimen from alcohol. Yellowish to dark brown, striations on head, face, and pronotum same color as those of ground color. Head (Figs 12, 13) yellowish, face with dark brown spot at upper central region, eyes brown with gray tinge, ocelli yellow, lower parts of ocelli slightly brown, anteclypeus with brown macula. Pronotum (Fig. 12) yellowish on anterior areas, especially those near eyes, then gradually darkening to almost black at posterior part. Mesonotum (Fig. 12) evenly black, with small yellowish tip. Forewing (Fig. 12) dark brown to almost black on basal part, veins black. Legs yellow with brown markings.

Body appearance (Fig. 12). Head across eyes (Fig. 13) slightly narrower than pronotum; crown short, almost parallel sided. Face (Fig. 13) including eyes 1.2× wider than its length; distance between ocelli nearly 4× that from ocellus to adjacent eye. Pronotum (Fig. 12) 2.2× wider than long, with striations nearly transverse. Mesonotum (Fig. 12) 1.3× longer than pronotum. Forewing (Fig. 14) with two subapical and three apical cells, venation prominent.

Male genitalia (Figs 15–21). Pygofer (Fig. 15) slightly prolonged caudally. Subgenital plate (Fig. 15) slender, slightly longer than ventral margin of pygofer, apical 1/2 with scattered setae. Dorsal connective (Fig. 16) relatively simple, S-shaped with apex broad and tapering to acute ventrally directed tip. Style (Fig. 17) with apophysis relatively straight, slightly widening to truncate apex, with marginal setae. Connective as in Figs 18, 19. Aedeagus (Figs 20, 21) with dorsal apodeme and preatrium short, shaft in lateral view broad basally, thereafter tapered to upturned apex, in ventral view expanded distally with conically rounded apex.

Figures 12–21. 

Pediopsis pianmaensis sp. nov. 12 male habitus, dorsal view 13 face 14 forewing 15 male pygofer and subgenital plate, lateral view 16 dorsal connective, lateral view 17 style, lateral view 18 connective, dorsal view 19 connective, lateral view 20 aedeagus, later view 21 aedeagus, ventral view. Scale bars: 1 mm (12, 14); 0.5 mm (13).

Measurement

Body length (including tegmen): 5.1 mm.

Distribution

China (Yunnan Province).

Etymology

The specific epithet refers to the type locality of the new species, Pianma Town (Yunnan Province), combined with the Latin suffix -ensis, meaning “pertaining to”.

Remarks

The new species can be distinguished from all other congeners by its darker body color, forewing with two ante-apical cells, simple aedeagus, and S-shaped dorsal connective.

Pediopsis bannaensis Yang & Zhang

Pediopsis bannaensis Yang & Zhang, 2015: 488, figs 29–39.

Remarks

This species was described from the holotype and paratype male from China deposited in the Northwest A&F University, Yangling, China (NWAFU) and three male paratypes from Thailand in the Illinois Natural History Survey, Champaign, USA (INHS). However, there are some ambiguities in the original description. Firstly, if the genitalia are drawn accurately, two different species appear to have been figured. The genitalia of one species were shown undissected in fig. 33 of the original description, and based on the aedeagus, the dissected parts of another species were shown in figs 34–39. The aedeagus shown in fig. 33 is the one described, i.e., “Aedeagus strongly tapered from wide base to narrow apex in lateral aspect”. Enquiries made by one of us (Webb) indicate that there are three (not two) Chinese specimens of the species present in the NWAFU collection, with the original type data, all without type labels. Of these specimens only one is dissected and matches fig. 33. Other enquiries made regarding the paratypes in INHS indicate that their aedeagi also match fig. 33. All type series specimens match the habitus images in the original description with respect to general appearance and color pattern, particularly the long dark basal triangles of the mesonotum. However, unaccountably none match the actual specimen imaged based on the leg position in the lateral habitus figure (Yang and Zhang 2015: fig. 30). It is suggested that the dissected specimen in NWAFU be regarded as the holotype even though we do not know what specimen provided the external images, which are of a better specimen.

Pediopsis femorata Hamilton

Figs 22–26

Pediopsis femorata Hamilton, 1980: 919.

Pediopsoides femorataHuang and Viraktamath 1993: 365, misapplication?

Pediopsis femorataDai et al. 2018: 188.

Remarks

This species was described based on the female type from Taiwan island, China. Subsequently, Huang and Viraktamath (1993) moved it into Pediopsoides Matsumura according to their own specimens from Taiwan. However, Dai et al. (2018) studied the material examined by Hamilton (1980) and Huang and Viraktamath (1993) and considered Huang and Viraktamath’s (1993) identification of Pediopsoides femorata to be a misidentification and gave it a new name; it may or may not be a new species of Pediopsoides (see Li et al. in prep.).

Figures 22–26. 

Female holotype of Pediopsis femorata Hamilton 22 habitus, dorsal view 23 labels 24 face, frontal view 25 habitus, lateral view 26 habitus, ventral view. Scale bars: 1 mm. Images © North Carolina State University.

Acknowledgements

We are very grateful to Dr Dmitri Yu. Tishechkin (M.V. Lomonosov Moscow State University, Moscow) for comments about the status of the new species described here, and to Dr Matt Bertone (North Carolina State University, Raleigh) for taking photos of Pediopsis femorata. We thank Drs Xiang-Sheng Chen, Jia-Jia Wang, and Chao Zhang (GUGC) for providing specimens for our study. This project was supported by a National Natural Science Foundation of China (No. 32000329), a Scientific Research Program Funded by Shaanxi Provincial Education Department (No. 21JK0568), and a “City-University Co-construction” Scientific Research Project for State Key Laboratory of Biological Resources and Ecological Environment of Qinling-Bashan (No. SXJ-2102).

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