A taxonomic revision of the genus Xylota Meigen (Diptera: Syrphidae) in Korea Author Jeong, Soo-Hyun Author Han, Ho-Yeon text Zootaxa 2019 2019-08-29 4661 3 457 493 journal article 25863 10.11646/zootaxa.4661.3.3 81a32fc3-9362-4ec2-b507-54859001f1e0 1175-5326 3446340 28EFDB26-4C37-4DA9-ABBB-122083EE396B Xylota tarda Meigen (Korean name: bae-mu-nui-heo-ri-kkot-deung-e) Figs 1R, S , 2R, S , 6 O–W, 12A–D, 13H Species new to Korea Xylota tarda Meigen, 1822: 225 ( type locality: Austria ; type ♀ , NMW); Hippa, 1968: 189 (taxonomic discussion and illustra- tion); Hippa, 1978: 64 (taxonomic discussion); Violovitsh, 1986: 140 (in Siberian key); Mutin & Barkalov, 1999: 492 , 497 (in Russian Far East key with illustration); Speight, 1999: 216 , 217 (in European key); Vujić & Milankov, 1999: 124 , 126 (in key of Balkan peninsula); Stubbs & Falk, 2002:336 , 440 (color illustration); Bartsch et al ., 2009: 416 (color illustration and diagnosis). Xylota arboris He & Chu, 1992:5 (type locality: Heilongjiang , Ningan; holotype ♂ , SAC); Mutin & Gilbert 1999: 53 (new synonym of X. tarda ); Huang & Cheng, 2012: 681 (diagnosis with illustration). Diagnosis. This species can be readily distinguished from the other Korean Xylota species by the following characters: 1) terga 2 and 3 each with a pair of large orange-yellow maculae almost touching each other ( Figs 2R, S , 6O, P ); 2) the area anterior to ocellar triangle (vertical triangle anterior to ocellar triangle in male and small area immediately anterior to ocellar triangle in female) bare ( Fig. 1R, S ); 3) scutal area anterior to wing base with yellow pile; and 4) anterior 2/3 of anterior anepisternum bare. See Diagnosis of X . abiens . Description of Korean material. MALE . Body length 9.3mm ; wing length 6.62mm ; dark brown to black species with pale orange-yellow abdominal maculae. Head black ( Fig. 6T, U ); face with dense yellow pollinosity; posterior half of frons anterior to eye contiguity with yellowish pollinosity ( Figs 1R , 6T, U ); area anterior to ocellar triangle (vertical triangle anterior to ocellar triangle) bare but posterior area covered with yellow pile ( Fig. 1R ). Thorax entirely black; scutum subshiny black, covered with short appressed yellow pile; anterior 2/3 of anterior anepisternum bare and posterior 1/3 covered with yellowish pollinosity; posterior anepisternum with yellowish pollinosity and white pile (upper 1/2 mixed with yellowish pile); anepimeron covered with white pile; katepisternum moderately covered with white pollinosity, dorsal posterior area with white pile; notopleuron with yellow pile; scutal area anterior to wing base with yellow with few black pile mixed; postalar callus with yellow pile; metasternum almost bare with white pollinosity. Wing entirely with pale brownish tinge, pterostigma pale brown ( Fig. 6O ); halter with basal 1/3 of stem dark brown but posterior stem and knob yellow. Legs: femora almost entirely dark brown to black; pro- and mesotibiae yellow and subapico-ventral 3/5 dark brown; pro- and mesotarsomeres 1–3 yellow, tarsomeres 4 and 5 brown; metatrochanter ventrally with short calcar (subequal to basal width) ( Fig. 6Q ); apico-ventral 1/3 of metafemur with two carinae covered with spinose setulae, remaining ventral area with irregular smaller spinose setae except for basal 1/5, antero-dorsally and postero-ventrally with long whitish yellow pile, apico-dorsal 1/3 area with short and dark brown pile; metatibia dark brown and basal 1/3 yellowish brown; metatarsomeres 1 and 2 dorsally dark brown and apico-ventrally brownish yellow ( Fig. 6Q ); tarsomere 3 dorsally dark brown and ventrally brownish yellow; tarsomere 4 and 5 black ( Fig. 6Q, R ). Abdomen about 3.5x longer than wide ( Figs 2R , 6O ), terga 2 and 3 almost parallel-sided but with slightly widened posterior ( Figs 2R , 6O ); preabdominal terga dark brown in ground color; tergum 2 with pair of large reddish yellow maculae covering almost 60–80% of tergum with their posterior half almost touching each other and anterior half cut away as inverted triangular shape; tergum 3 with pair of square reddish yellow maculae covering about anterior half of tergum, almost touching each other. Male genitalia ( Figs 12 A–D, 13H): surstylus with dorsal lobe, elongated about 1.5x as long as ventral lobe, long finger shaped and slightly bent ventrally in lateral view, densely covered with spinose setulae ( Fig. 12 A–C); ventral lobe of surstylus blunt but distinctly projected with apex setulose ( Fig. 12B, C ); cercus cordated in profile with long pale pile ( Fig. 12 A–C); lingula indistinct ( Fig. 13H ); fenestra small and elongated elliptic ( Fig. 12B, C ); spur of superior lobe reduced ( Fig. 13H ); superior lobes almost symetrical ( Fig. 12B, C ); lateral arms of theca elongated and crooked down with blunt apex, apico-dorsally round and bulged with small spinose pile, dorsally with few denticles in varying size ( Fig. 12B ); aedeagus with ejaculatory hood medially with furrow in postero-ventral view, dorsally round; ejaculatory process short ( Fig. 13H ); ejaculatory apodeme apically enlarged and bowl shaped. FIGURE 6. Leg, head and body of Xylota speices. A–E . X. pseudoignava : (A dorsal view, E lateral view) male body; (B) female body; (C) male left metafemur, anterior view; (D) female left metafemur, anterior view; (F dorsal view, G antero-lateral view) male head; (H, I) female head. 6J–N . X. spurivulgaris : (J, L) male body; (K) male left metafemur anterior view; (M, N) male head; see Fig, 4 for presumed female photos. 6O–W . X. tarda : (O, S) male body; (P) female body; (Q) male left metafemur, anterior view; (R) female left metafemur, anterior view; (T, U) male head; (V, W) female head. FEMALE. Similar to male except for the following non-genitalic characters: Head ( Fig. 1S ): frons with about anterior 1/3 shiny black and bare with posterior 2/3 shiny black and covered with whitish yellowish pile, medially with pair of areas of yellowish pollinosity except for medially narrow longitudinal bare area; area anterior to ocellar triangle (small area immediately anterior to ocellar triangle) bare but posterior area covered with yellow pile. Leg ( Fig. 6R ): metatrochanter without calcar. Abdomen ( Fig. 6P ): terga 2 and 3 posteriorly widen. Material examined. SOUTH KOREA : Gangwon-do: 1♂ , Samcheok-si , Hajang-myeon , Mt. Jungbongsan N37°26’19” E128°55’34” , 8.IX.2008 , YB Lee et al .; 1♀ , Hongcheon-gun , Nae-myeon , Changchon-ri , North valley of Mt. Gyebangsan , 14.VIII.2009 , JM Jung and YB Lee . Distribution. Korea (new record), Russia (From Altay to Kuril Isles), widely distributed in whole Europe. Remarks. The genitalic structures of the Korean male ( Figs 12C ) agree with the illustration of Hippa (1968) as well as the illustrations and description by Stubbs & Falk (2002) and Bartsch et al . (2009) . Xylota tarda seems to be closely related to X. filipjevi (see Remarks for the latter species).