Research Article |
Corresponding author: Xingmin Wang ( wangxmcn@scau.edu.cn ) Academic editor: Natalia Vandenberg
© 2014 Xingmin Wang, Wioletta Tomaszewska, Shunxiang Ren.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Wang X, Tomaszewska W, Ren S (2014) A new species and first record of the genus Cynegetis Chevrolat (Coleoptera, Coccinellidae, Epilachnini) from China. ZooKeys 448: 37-45. https://doi.org/10.3897/zookeys.448.8342
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The first species of the genus Cynegetis Chevrolat is recorded from China. Cynegetis chinensis Wang & Ren, sp. n. is described from the Ningxia Province in North China. A key to the known species of Cynegetis is given. Diagnostic similarities and differences between Cynegetis and Subcoccinella Agassiz & Erichson are discussed and illustrated.
Entomology, taxonomy, Cucujoidea , Cynegetis , new species, China
The genus Cynegetis was established by Chevrolat (Chevrolat in
The subfamily Epilachninae traditionally was divided into four tribes: Epilachnini Mulsant, Madaini Gordon, Epivertini Pang & Mao and Eremochilini Gordon & Vandenberg (
The species of Cynegetis are very similar to Subcoccinella Agassiz & Erichson in having oval and strongly convex bodies, well developed spurs on all tibiae and similar male and female genitalia.
Cynegetis is a very small genus, containing only two species: C. impunctata (Linnaeus, 1958) and C. syriaca (Mader, 1958), which are distributed in the Palaearctic region (
The external morphology was observed with a dissecting stereoscope (SteREO Discovery V20, Zeiss and Leica Mz Apo). The following measurements were made with an ocular micrometer: total length, length from apical margin of clypeus to apex of elytra (TL); total width, width across both elytra at widest part (TW = EW); height, from the highest part of the beetle to elytral outer margins (TH); head width in a frontal view, widest part including eyes (HW); pronotal length, from the middle of anterior margin to the base of pronotum (PL); pronotal width at widest part (PW); elytral length, along the suture, from the apex to the base including the scutellum (EL). Male and female genitalia were dissected, cleared in a 10% solution of NaOH by boiling for several minutes, and examined with an Olympus BX51 and Leica compound microscopes.
Morphological character photographs were made with digital cameras (AxioCam HRc and Coolsnap–Procf & CRI Micro*Color), connected to the dissecting microscope. The software AxioVision Rel. 4.8 and Image-Pro Plus 5.1 were used to capture images from both cameras, and photos were cleaned up and laid out in figs with Adobe Photoshop 8.0 CS.
Morphological terms of Coccinellidae follow
Cynegetis Chevrolat in
Cycnegetis (sic!):
This genus is most similar to Subcoccinella in general shape of the body and the genitalia of both sexes and sharing interocular distance of more than 0.75 width of head (Figs
Morphological characters of the genus Cynegetis. a–o Cynegetis impunctata Linnaeus, 1767 From Poland. a dorsal habitus b ventral habitus c lateral habitus d frontal habitus e antenna f mandible g maxilla h abdomen i front leg j hind leg k tarsal claw l–o male genitalia: l penis m apex of penis n tegmen, lateral view o tegmen, ventral view p female genitalia: coxites and spermatheca.
Morphological characters of the genus Subcoccinella. a–l Subcoccinella vigintiquatuorpunctata Linnaeus, 1758 From China. a dorsal habitus; b antenna c maxilla d labium e mandible f labrum g abdomen h front leg i hind leg j tarsal claw k male genitalia: penis and tegmen l female genitalia: coxites and spermatheca.
Cynegetis chinensis Wang & Ren, sp. n. a dorsal habitus b lateral habitus c frontal habitus d antenna e mandible f maxilla g labium h labrum i abdomen j front leg k hind leg l tarsal claw m–p male genitalia: m penis n apex of penis o tegmen, lateral view p tegmen, ventral view q female genitalia: coxites.
Body shortened oval, strongly convex, dorsum densely pubescent (Figs
Pronotum transverse, widest at base and gradually narrowing anteriorly, anterior and hind margins not bordered, anterior angles distinctly protruded. Scutellum small, triangular. Elytra at base distinctly wider than pronotum, lateral margins very narrow, invisible from above, humeral angles inconspicuous. Prothoracic hypomeron with clearly delimited cavities to accommodate apices of femora of front legs. Prosternum T-shaped, without carinae (Fig.
Mesoventrite with anterior edge with complete raised border and with weak groove behind it, mesal surface with cavity for receiving prosternal process; meso-metaventral junction broad, forming an almost straight line or slightly emarginated. Metaventrite about as long as abdominal ventrite 1 with incomplete discrimen (Fig.
Fore and mid trochanters angulate, produced. Fore tibia with single apical spur; mid and hind tibiae with two spurs (Figs
Abdomen with six ventrites in males and five ventrites in females; abdominal postcoxal lines recurved roundly, almost complete (Figs
Male genitalia. Tegmen stout, penis guide wide and flat in ventral view, parameres straight with densely distributed setae apically (Figs
Female genitalia. Coxites oval, setose apically; styli present or absent. (Figs
China: Ningxia; Europe (Austria, Belgium, Bosnia and Herzegovina, Czech Republic, Denmark, Finland, France, Germany, Hungary, Italy, Norway, Poland, Romania, Slovakia, Spain, Sweden, Switzerland, West Russia); Asia: Asian part of Russia (Maritime Prov.), Iran, N. Korea, Syria, Turkey.
1 | Antennomere 7 subquadrate; elytra covered with black, transverse, irregularly shaped bands (Fig. |
C. chinensis Wang & Ren, sp. n. |
– | Antennomere 7 distinctly elongate; elytra with separated black spots or without black spots | 2 |
2 | Maxillary lacinia strongly sclerotized, hook-like; head always black; apex of penis bifid (Fig. |
C. impunctata (Linnaeus) |
– | Maxillary lacinia moderately sclerotized, simple; head often brown; elytra yellowish brown with black spots; apex of penis not bifid; the length of parameres distinctly shorter than penis guide | C. syriaca (Mader) |
This species is very similar to C. syriaca in general appearance and male genitalia but it can be distinguished from the latter as follow: antennomere 7 subquadrate, scutellum black, most of black spots on elytra joined, forming wavy shaped bands, coxites bearing distinct styli and the characters of penis capsule and penis guide are distinctly different from the latter. In C. syriaca, antennomere 7 is distinctly elongate, scutellum yellow, black spots on the elytra are separated from each other and the coxites lack styli (
TL: 3.4–3.5 mm, TW: 2.7–2.9 mm, TH: 1.7–1.9 mm, TL/TW: 1.21–1.26; PL/PW: 0.44–0.45; EL/EW: 1.00–1.03; HW/TW: 0.38; PW/TW: 0.67.
Body short oval, dorsum strongly convex, densely pubescent (Fig.
Head with frontal punctures fine and inconspicuous, associated with scattered long setae; eyes of small size and moderately coarsely faceted. Maxillary lacinia moderately sclerotized, simple. Pronotal disk with fine and densely distributed punctures, slightly larger than those on head, 0.5–1.0 diameters apart. Elytral disk with punctures similar to those on pronotum. Prosternum and mesoventrite rough, with scattered short setae. Metaventrite broad with fine and inconspicuous punctures.
Male genitalia. Penis stout, strongly curved, apex slightly expanded, truncate with scattered short setae, basal capsule large (Fig.
Female genitalia. Coxites oval, with distinct terminal styli (Fig.
Holotype: 1 male, China, Ningxia: Baiyunsi, Liupanshan National Natural Reserve, Jingyuan County, 106°15.6'E, 35°36.6'N, ca2300m, 10.viii.2009, Wang XM leg; Paratypes: 1 female, same data as holotype.
China (Ningxia).
The specific epithet is an adjective derived from the geographical name “China”, the type locality of this ladybird.
We thank Adam Ślipiński for providing many useful suggestions and lending specimens of C. impunctata and S. vigintiquatuorpunctata. The research was supported by the National Natural Science Foundation of China (No. 30970324 and 2006FY120100).