Two new species of leafhopper subgenus Pediopsoides (Pediopsoides) Matsumura, 1912 P. (P.) bispinata Li, Dai & Li sp. nov. and P. (P.) nigrolabium Li, Dai & Li sp. nov. from southern China, are described and illustrated. An updated checklist and distribution of the subgenus from the world is provided, along with a key to distinguish all species of the subgenus.
The leafhopper genus Pediopsoides (Cicadellidae: Macropsinae: Macropsini) was primitively established by Matsumura (1912) for the single species, Pediopsoides formosanus Matsumura, 1912, from the Taiwan province of China. However, it was not recognized for a long time and excluded in the work of Evans (1947) and Metcalf (Fascicle-VI, Cicadelloidea: part 13, Macropsidae) (but as a synonym of genus Iassus in Fascicle-VI, Cicadelloidea: part 15, Iassidae) (1966a, b). Hamilton (1980) revised the genus Pediopsoides on the level of generic status, and separated to 5 subgenera, nominate subgenus Pediopsoides (Pediopsoides), P. (Celopsis), P. (Sispocnis), P. (Nanopsis), P. (Kiamoncopsis), and proposed 9 new combinations and 1 new synonymy of species, including 1 new combination in this nominate subgenus, P. (Pediopsoides). Later, Huang & Viraktamath (1993) transferred Pediopsis femorata Hamilton, 1980 into this subgenus, Viraktamath (1996) described a new species P. (P.) kodaiana from Tamil Nadu of India, and recently Zhang (2010) described a new species from Yunnan province of China. So far, there are 5 species of the subgenus were known from the world.
In the present paper, 2 new species, Pediopsoides (Pediopsoides) bispinata Li, Dai & Li sp. nov. and P. (P.) nigrolabium Li, Dai & Li sp. nov., from Guangxi province (Oriental region) of southern China are described and illustrated (Figs. 1–27), an updated checklist and distribution of the nominate subgenus Pediopsoides (Pediopsoides) from the world is provided, along with a key to all species of the nominate subgenus.
The morphological terminology follows Hamilton (1980).
The type specimens of the new species are all deposited in the Institute of Entomology, Guizhou University, Guiyang, China (GUGC).
Subfamily Macropsinae Evans
Tribe Macropsini Evans
Genus Pediopsoides Matsumura
Subgenus Pediopsoides (Pediopsoides) Matsumura
Pediopsoides (Pediopsoides), Hamilton, 1980: 896.
Head narrower than pronotum (occasionally as wide as pronotum in species P. (P.) kodaiana). Crown more or less shorter centrally than laterally. Face as long as wide across eyes, occasionally narrower, slightly convex in profile. Lora small relatively, concealed by prominent lobes of frontoclypeus in male individuals, relatively large in female individuals. Clypellus slightly tapered apically. Pronotum broad, striations oblique, dense, obscure. Hind tibial macrosetae 7 ± . Forewings with 2 anteapical cells, appendix narrow.
Genitalia. Male pygofer broad without articulated lobes, ventral margin produced with simple spines or processes. Subgenital plates slender, with marginal setae usually. Dorsal connectives strongly developed, sinuated laterally, generally projecting past caudal margin of pygofer, varies with species. Aedeagus tubular, stout, tapering, directed dorsad (Figs. 28–35), gonopore usually apical. Style narrower, slender, tip upturned apically. Female seventh sternite more or less trapezoidal, posterior margin sinuated usually.
All known species are distributed in the Oriental region, mainly in southern China, Guangxi and Taiwan provinces; the remaining species are found in Japan and India (Fig. 36).
The subgenus Pediopsoides (Pediopsoides) can be distinguished from all other subgenera by that, dorsal connectives are fused to tenth tergite in subgenus P. (Celopsis), male pygofer spine bifid or with rounded lobe on inner margin basally in subgenus P. (Sispocnis), male pygofer with a small secondary pygofer spine posteriorly in subgenus P. (Nanopsis), male pygofer spine multifid rather than bifid in subgenus P. (Kiamoncopsis).
UPDATED CHECKLIST OF SPECIES OF SUBGENUS PEDIOPSOIDES (PEDIOPSOIDES) FROM THE WORLD
Pediopsoides (Pediopsoides) bispinata Li, Dai & Li sp. nov.
Distribution. China (Guangxi prov.).
Pediopsoides (Pediopsoides) femorata Huang & Viraktamath
Pediopsoides (Pediopsoides) femorata, Huang & Viraktamath, 1993: 365.
Distribution. China (Taiwan prov.).
Pediopsoides (Pediopsoides) formosanus Matsumura
Pediopsoides formosanus Matsumura, 1912:306.
Bythoscopus formosanus, Schumacher, 1915: 101.
Distribution. China (Taiwan prov.).
Pediopsoides (Pediopsoides) jingdongensis Zhang
Pediopsoides (Pediopsoides) jingdongensis Zhang, 2010: 58.
Distribution. China (Yunnan prov.).
Pediopsoides (Pediopsoides) kodaiana Viraktamath
Pediopsoides (Pediopsoides) kodaiana Viraktamath, 1996: 188.
Distribution. India (Tamil Nadu).
Pediopsoides (Pediopsoides) nigrolabium Li, Dai & Li sp. nov.
Distribution. China (Guangxi prov.).
Pediopsoides (Pediopsoides) satsumensis (Matsumura)
Pediopsis satsumensis Matsumura, 1912: 311.
Pediopsoides (Pediopsoides) satsumensis, Hamilton, 1980: 896.
Distribution. Japan (Kiushu).
KEY TO MALES OF SPECIES OF THE SUBGENUS PEDIOPSOIDES (PEDIOPSOIDES)
P. (P.) formosanus Matsumura 1912 is excluded from the key because only the female is known.
1. Aedeagal shaft with paired symmetrical processes subapically or apically (Figs. 30–35) 2
2. Aedeagal shaft with paired symmetrical processes apically (Figs. 34–35) P. (P.) jingdongensis
—Aedeagal shaft with paired symmetrical processes subapically (Figs. 30–33) 3
3. Processes on aedeagal shaft pointed caudally (Figs. 32–33) P. (P.) kodaiana
— Processes on aedeagal shaft pointed ventrally (Figs. 30–31) P. (P.) femorata
4. Aedeagal shaft stout, inflated subapically (Figs. 28–29) P. (P.) satsumensis
5. Aedeagal shaft weakly directed dorsad, apex of aedeagal shaft lobe shaped (Figs. 22–23) P. (P.) nigrolabium sp. nov.
— Aedeagal shaft strongly directed dorsad, apex of aedeagal shaft tapering to point, without any process (Figs. 12–13) P. (P.) bispinata sp. nov.
Body darker, ventral aspect greenish or more light (Figs. 1–4). Head and face green, clypellus slightly brown, eyes black. Pronotum darker, both lateral regions near eyes dark to green. Scutellum dark brown. Fore wings darker. Legs light brown.
Head distinctly narrower than pronotum, arched forward slightly. Frons with a slight longitudinal carina, ocelli located between eyes, separated by nearly 6 times the distance from ocellus to adjacent eye, lora small in males, clypellus small, tapered. Pronotum broad, slightly concave on posterior margin, striae on surface dense, oblique, obscure. Scutellum triangular, small comparatively, mid length shorter than pronotum slightly, with one heavy notch on posterior region. Forewings opaque, with 2 anteapical cells.
Male genitalia. Pygofer (Fig. 8) slightly elongate, ventral margin with two small spines and several setae (Figs. 10 and 11), tenth tergite large. Subgenital plates slender with marginal setae (Fig. 9). Aedeagus tubular, broader basally, shaft tapering, strongly twisted to dorsum, median shaft slightly inflated, then suddenly narrower in ventral aspect, apex tapering to point, gonopore apical (Figs. 12 and 13). Dorsal connectives (Fig. 15) strongly developed, apically produced as a slender process which definitely directed ventrad and exceeds caudal margin of pygofer. Style relatively stout, margin with some setae, slightly expanded from base to apex, apically with a digitate shaped protrusion, upturned (Fig. 14). Connective stout, with a finger-like protrusion in middle, both lateral arms twisted dorsad (Figs. 16 and 17)
Female. Body coloration and appearance similar to male, but more stout. Seventh sternite broad, trapezoidal, posterior margin sinuated, “W” shaped, length of midline about 2 times as long as sixth sternite, ovipositor strongly projecting beyond pygofer (Fig. 4).
Measurement. Length (including tegmen):♂, 4.8–5.0 mm, ♀, 5.2–5.3 mm.
Holotype:♂, China: Guangxi Province, Wuming County, Damingshan Nature Reserve, 15 May 2011, collected by Yu Xiaofei; Paratypes: 3♀ ♀ 2♂ ♂, data same as holotype.
China (Guangxi Province).
This new species is similar to P. (P.) kodaiana Viraktamath, 1996 but can be distinguished from the latter in the ventral margin of male pygofer has only 2 small spines, aedeagal shaft is without any processes, gonopore is apical; dorsal connectives also differ in shape, and body coloration is also discrepant.
This new species name is derived from the Latin words “bi-” and “spinatus”, indicating that the ventral margin of male pygofer has 2 small spines.
Body coloration and appearance similar to P. (P.) bispinata Li, Dai & Li sp. nov., but ventral aspect of body black, head and face yellowish brown, clypellus black, both lateral regions near eyes of pronotum dark to brown, and body more stout (Figs. 5–7).
Male genitalia. Pygofer broad, nearly square, ventral margin with long dichotomous or trichotomous process, two small spines with several setae (Figs. 18, 20–21). Subgenital plates slender, apical half with marginal setae, apex twisted to dorsum (Fig. 19). Aedeagus tubular, broader basally, shaft tapering to point, sinuated, apex sharpened laterally, ventrally apical half narrower, tip lobe shaped, gonopore apical (Figs. 22 and 23). Dorsal connectives strongly developed, apices with 2 processes, upper one stout, end twisted ventrally, lower one slender, end twisted to dorsum, slightly projecting from caudal margin of pygofer (Fig. 25). Styles and connective resemble P. (P.) bispinata sp. nov., but more slender or narrower (Figs. 24, 26–27).
Measurement. Length (including tegmen):♂, 5.5 mm.
Holotype:♂, China: Guangxi Province, Wuming County, Damingshan Nature Reserve, 15 May 2011, collected by Yu Xiaofei.
China (Guangxi Province).
This new species is similar to P. (P.) bispinata Li, Dai & Li sp. nov., but can be distinguished from the latter in the clypeus black, the ventral margin of male pygofer has a long process with two or three spines, dorsal connective also differs in shape.
The new species name is derived from the Latin words “nigro” and “labium”, indicating that the clypellus is black.
We sincerely extend our thanks to Prof. K. G. A. Hamilton (Eastern Cereal and Oilseed Research Centre, and Canadian National Collection of Insects, Arachnids and Nematodes, Ottawa, Ontario, Canada) for constructive suggestions, to Dr. M. W. Nielson (Affiliate Research Professor, Monte L. Bean Museum, Brigham Young University, Provo, USA) for kindly guidance on species name, and to Ms Xiaofei Yu (GUGC) for providing specimens. The authors also thank Dr. Waldemar Klassen (Editor) and anonymous reviewers for reading the manuscript and making some critical comments and corrections. The project was supported by the National Natural Science Foundation of China (31000952).