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唐璞，何俊华，Cornelis VAN ACHTERBERG，陈学新*
（1.水稻生物学国家重点实验室（浙江大学），杭州 310058；
2.浙江省作物病虫生物学重点实验室（浙江大学），杭州 310058；
3.农业农村部作物病虫分子生物学重点实验室（浙江大学），杭州 310058；
4.浙江大学农业与生物技术学院昆虫科学研究所，杭州310058）
Cheloninae Foerster, 1863 is a moderately large subfamily of the family Braconidae(Insecta:Hymenoptera) with almost 1 500 described species worldwide and is currently divided into four tribes: Adeliini Viereck,1918;Chelonini Foerster,1863;Odontosphaeropygini Zettel,1990;Phanerotomini Baker,1926[1-2].
Siniphanerotomellawas erected by He, Chen et van Achterberg (1994) to includeS.fanjingshanaHe,Chen et van Achterberg, 1994, from southwestern China (Guizhou). It is a small genus with only two species currently named (S.fanjingshanaHe, Chen et van Achterberg, 1994 andS.disparclypeolusJi et Chen, 2003) and both only known from Oriental China[2-4].Siniphanerotomellabelongs to the tribe Phanerotomini because of its metasoma with two complete transverse sutures, and it is the only genus without vein 1-SR＋M of the fore wing in this tribe.The biology of this genus is still unknown[2-3].
During the study of the Chinese Cheloninae, we discovered another new species,S.chengjiaaniTang et Chen, sp. nov., from Guangdong (South China).Here this new species is described and illustrated. A key to species of the genusSiniphanerotomellais also given.
This study is based on the specimens preserved in the Parasitic Hymenoptera Collection of Institute of Insect Sciences, Zhejiang University, Hangzhou,China(ZJUH).
The terminology and measurements used follow VAN ACHTERBERG[5-6]. The following abbreviations are used: postocellar line, POL; ocular-ocellar line,OOL, measured from ocellus directly to eye; maximum diameter of lateral ocellus, OD. All descriptions and measurements were made under a Zeiss Stemi 2000-C microscope (Germany); figures were made by a Keyence VHX-2000 digital microscope (Japan). Type specimens are deposited in the ZJUH.
Key to species of Siniphanerotomella He,Chen et van Achterberg
Description (Fig. 1).Holotype,♀, length of body 2.8 mm,of fore wing 2.6 mm.
Fig.1 Siniphanerotomella chengjiaani Tang et Chen,sp.nov.
Head. Median length of head 1.8×its width.Antennal segments 18, first segment robust, length of third segment 1.2×fourth segment, length of third,fourth, tenth and penultimate segments 4.8, 3.3, 1.8,1.8×their width, respectively. Eyes slightly protruding,glabrous, in dorsal view its length 1.2×length of temple.Temples narrowed behind eyes.Frons slightlyconcave medially, smooth below, laterally with curved striae mixed with punctures and extending from anterior ocellus to antennal sockets.Vertex and temple reticulate, behind ocelli transversely striate-rugose.Ocelli small, arranged in regular triangle; POL∶OD∶OOL=15∶12∶40. Length of face 1.7×its width; face protruding near antennal sockets, medially convex,reticulate, obliquely rugose near dorsolateral corners.Clypeus distinctly separated from face, evenly convex,sparsely punctulate in basal half, obliquely striate in apical half; length of clypeus 0.65×its width; clypeus truncate apico-medially. Hypoclypeal opening small.Length of malar space 0.8×basal width of mandible.Mandible long, upper tooth much longer than lower tooth,with deep basal depression.
Mesosoma. Length of mesosoma 1.7×its height.Sides of pronotum crenulate medially, remainder largely punctate. Mesoscutum densely reticulate,more coarsely reticulate postero-medially. Scutellum shallowly punctate-rugose, nearly smooth. Scutellar sulcus widely crenulate. Mesopleuron convex medially,densely punctate-reticulate, precoxal area indistinct,coarsely punctate medially. Postpectal carina weak.Metapleuron slightly convex, densely punctatereticulate. Median carina of propodeum distinct,transverse carina strong; dorsal face of propodeum much longer than its posterior part.
Wings. Fore wing: length of pterostigma 3.2×its width;length of vein 1-R1 1.4×length of pterostigma;r∶3-SR∶SRl=11∶14∶70; second submarginal cell large, nearly rectangular; 2-SR∶3-SR∶r=30∶13∶13;vein m-cu postfurcal; vein 2-SR＋M vertical; vein m-cu as long as vein 2-SR＋M; vein cu-a distinctly postfurcal;cu-a∶1-CU1∶2-CU1=14∶6∶34.Hind wing:vein 2-SC＋R longitudinal(=horizontal);vague remnant of vein r present,unpigmented;M＋CU∶1-M=40∶33.
Legs. Hind coxa smooth; hind femur robust, but fore and middle femora normal; length of hind femur 3.1×its width; hind tibia widened apically, slightly longer than hind tarsus;length of hind basitarsus 3.0×inner hind tibial spur,0.4×length of hind tarsus.
Metasoma. Surface of metasoma longitudinally reticulate-rugose, with intermittent punctures or microsculpture; length of first metasomal tergite∶length of second tergite∶length of third tergite=19∶20∶40;length of first and second tergites 0.75 and 0.6×their apical width, respectively, length of third tergite 1.3×its basal width; third tergite concave apico-medially;ovipositor sheath short,its length 0.6×hind basitarsus,widened apically; ovipositor slender, slightly extending beyond apex of metasoma, directed upwards apically,its length 1.4×hind basitarsus.
Colour. Black; palpi white; mandible brownishyellow, blackish-brown apically; basal two segments of antenna brownish-yellow,antenna darkened towards apex; tegulae light brown; legs yellowish-brown;middle femur, tibia (except its base), first to fourth of middle and hind tarsi dark brownish-yellow; hind femur, tibia (except its apex), and apex of fore tarsus blackish-brown. Wing membrane dark brown with pale band below base of pterostigma;pterostigma and veins blackish-brown.
Variation. Length of body 2.8-3.3 mm, of fore wing 2.6-2.8 mm. Median length of head (1.8-2.0)×its width.Antennal segments 18-19, length of penultimate segment (1.7-1.8)×its width. Fore wing: length of pterostigma (2.8-3.2)×its width; length of vein 1-R1(1.3-1.4)×length of pterostigma; r∶3-SR∶SRl=11∶(13-14)∶(67-70); 2-SR∶3-SR∶r=(25-30)∶13∶13;cu-a∶1-CU1∶2-CU1=(12-14)∶6∶(33-34).Hind wing:M＋CU∶1-M=(35-40)∶(30-33). Second to fourth basal segments of antenna light brownish-yellow;hind femur brownish-yellow.
Male. Length of body 3.1-3.3 mm, of fore wing 2.7-2.8 mm. Median length of head 1.7×its width.Antennal segments 25, length of third segment 1.1×fourth segment; length of third, fourth, tenth and penultimate segments 4.0, 3.7, 2.0, 1.8×their width,respectively. Eyes in dorsal view as long as temple.POL∶OD∶OOL=5∶7∶8.Face transversely square,length of face 1.6×its width; clypeus shallowly punctulate and rugose; length of clypeus 0.5×its width. Length of mesosoma 1.9×its height. Scutellar sulcus with 6 crenulae. Fore wing: length of pterostigma 2.6×its width; length of vein 1-R1 1.4×length of pterostigma;r∶3-SR∶SRl=11∶15∶67; 2-SR∶3-SR∶r=32∶15∶13;cu-a∶1-CU1∶2-CU1=14∶5∶36.Hind wing:M＋CU∶1-M=52∶32.Length of hind femur 2.5×its width;length of hind basitarsus 2.2×inner hind tibial spur. Length of first metasomal tergite∶length of second tergite∶length of third tergite=19∶20∶40; length of first and second tergites 1.0 and 0.7×their apical width, respectively,length of third tergite 1.3×its basal width.
Distribution.China(Guangdong)
Biology.Unknown.
Etymology.The species is named in honour of the well-known Chinese entomologist, the late Prof.Jia’an Cheng (1942-2022), in recognition of his contribution to insect pest management in the world.
Material examined.Holotype,♀, China,Guangdong Province, Ruyuan Nanling, 24.Ⅷ.2004,Xu Zaifu, No. 20047796 (ZJUH). Paratypes, 1♀, same data as holotype, No. 20047796 (ZJUH); 4♀♀61♂♂,topotypic, but 18.Ⅸ.2007, Cai Yali, Nos. 200609638,200609644-200609659, 200609661-200609663,200609665-200609668, 200609670-200609671,200609674-200609683, 200609686-200609688,200609690-200609693, 200609697, 200609699,200609701-200609702, 200609704-200609705,200609707, 200609709-200609711, 200609713-200609716, 200609718-200609721, 200609723-200609725 (ZJUH); 1♀, Guangdong Province,Conghua Xiliuhe, 29-31.Ⅷ.2004, Xu Zaifu, No.20058839(ZJUH).
Diagnosis.The new species is similar to both other known species, but differs by having the penultimate antennal segment 2.5×its width (S.fanjingshana, 2.0×;S.disparclypeolus, 1.7×); OOL=3.6×POL (S.fanjingshana, 3.3×;S.disparclypeolus,2.0×); length of pterostigma 2.6×its width (S.fanjingshana,3.0×;S.disparclypeolus,3.5×);and SR1=4.5×3-SR (S.fanjingshana, 5.6×;S.disparclypeolus,5.5×).
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