Xylota pseudoignava Mutin, 1984

Jeong, Soo-Hyun & Han, Ho-Yeon, 2019, A taxonomic revision of the genus Xylota Meigen (Diptera: Syrphidae) in Korea, Zootaxa 4661 (3), pp. 457-493 : 476-477

publication ID	https://doi.org/ 10.11646/zootaxa.4661.3.3
publication LSID	lsid:zoobank.org:pub:28EFDB26-4C37-4DA9-ABBB-122083EE396B
DOI	https://doi.org/10.5281/zenodo.5935698
persistent identifier	https://treatment.plazi.org/id/5A219B24-3457-472C-FCED-FA799D9714E5
treatment provided by	Plazi
scientific name	Xylota pseudoignava Mutin
status

Treatment

Xylota pseudoignava Mutin

(Korean name: teol-bo-heo-ri-kkot-deung-e)

Figs 1I, J View FIGURE 1 , 2I, J View FIGURE 2 , 6 View FIGURE 6 A–E, 11E–H, 13J

Species new to Korea

Xylota pseudoignava Mutin, 1984: 783 (type locality: Russia. Khabarovsk krai, environs of Pivan Village; holotype ♂, ZISP); Mutin & Barkalov, 1999: 496, 498 (in Russian Far East key); Mutin & Gilbert, 1999: 52 (illustration and diagnosis).

Xylota crepera: He & Chu, 1992: 3 (type locality: Heilongjiang, Ningan; holotype ♂, SAC); Mutin & Gilbert, 1999: 52 (new synonym of X. pseudoignava ).

Diagnosis. Xylota pseudoignava is similar to X. xanthotarsis sp. n., especially by sharing the silvery pilose patched abdomen ( Fig. 2I, J View FIGURE 2 ), while other similar dark colored Korean species have yellowish or white pilose abdominal patches. The former species can be further distinguished from the latter by the following combination of characters: 1) metatarsus dark brown ( Fig. 6C, D View FIGURE 6 ) vs. pale yellow ( Fig. 7L, M View FIGURE 7 ); and 2) postalar callus of scutum with dense black pile vs. sparse or no such black pile. Male genitalic structures of these species are also closely resembling each other but X. pseudoignava has the hypandrium ventrally with a strong hump ( Figs 11F, G View FIGURE 11 , 13J View FIGURE 13 ) but X. xanthotarsis sp. n. only with a weak hump ( Figs 12J, K View FIGURE 12 , 13I View FIGURE 13 ).

Description of Korean material. Male. Body length 12.9mm; wing length 9.1mm. Black with silvery white abdominal pollinose patched species. Head black ( Fig. 6 View FIGURE 6 F–I); face with dense yellow pollinosity without bare part; posterior 1/3 of frons anterior to eye contiguity with yellowish pollinosity ( Fig. 1I View FIGURE 1 ); area anterior to ocellar triangle (vertical triangle anterior to ocellar triangle) bare but posterior area covered with yellow pile ( Fig. 1I View FIGURE 1 ). Thorax entirely black ( Fig. 6A View FIGURE 6 ); scutum subshiny black with appressed short yellow pile, but posterior half sparsely with longer erect yellow pile mixed with short pile; anterior anepisternum covered with yellowish pollinosity; posterior anepisternum with dense yellow pile and yellowish pollinosity; anepimeron covered with yellow pile; katepisternum moderately covered with whitish yellow pollinosity, upper posterior area with whitish yellow pile; anepimeron covered with yellow pile; katepisternum moderately covered with whitish yellow pollinosity, dorsal posterior area with whitish yellow pile; notopleuron with yellow pile; scutal area anterior to wing base with black and few yellow pile mixed; postalar callus mainly with black pile and posterior with some yellow pile; metasternum bare with yellow pollinosity. Wing with pale brownish tinge on cell r 2+3 of wing, pterostigma brown; halter with basal half of stem dark brown but posterior stem and knob yellow. Legs: femora almost entirely black; pro- and mesotibiae yellow and subapico-ventral 2/3 dark brown to black; pro- and mesotarsomeres 1 and 2 yellow, tarsomeres 3–5 black; metatrochanter ventrally with elongated and sharp calcar (at least twice as long as basal width) ( Fig. 6C View FIGURE 6 ); apico-ventral 1/3 of metafemur with two carinae covered with spinose setulae, remaining ventral area with two irregular rows of spinose setae except for basal 1/5 (anterior row covers whole length but posterior row reaches 2/3 length), anterodorsally and postero-ventrally with long yellowish pile, apico-dorsal 1/3 area with short and black pile; metatibia dark brown to black and basal 1/3 yellowish brown; metatarsus dark brown to black ( Fig. 6C View FIGURE 6 ). Abdomen about 4x longer than wide ( Figs 2I, J View FIGURE 2 , 6A, B View FIGURE 6 ), terga 2 and 3 almost parallel-sided ( Figs 2I View FIGURE 2 , 6A View FIGURE 6 ); terga 2–4 with pair of lateral facing triangular areas densely covered with white pollinosity and white erect pile (other areas of terga with short appressed black pile) ( Fig. 2I View FIGURE 2 ). Male genitalia ( Figs 11 View FIGURE 11 E–H, 13J): surstylus with dorsal lobe elongated about 1.5 x as long as ventral lobe, long finger shaped and slightly bent ventrally in lateral view, densely covered with spinose setulae ( Figs 11 View FIGURE 11 E–G); ventral lobe of surstylus blunt but distinctly projected with apex setulose ( Fig. 11 View FIGURE 11 E–G); cercus cordated in profile with long pale pile ( Fig. 11 View FIGURE 11 E–G); lingula with distinct margin ( Fig. 13J View FIGURE 13 ); fenestra transversely elliptic in outline ( Fig. 11 View FIGURE 11 E–G); spur of superior lobe reduced; superior lobes almost symmetrical ( Fig. 11F, G View FIGURE 11 ); lateral arms of theca about apical half with sparsely scattered spiny setulae, dorsally rounded, apico-ventrally with short tiny protrusion; lateral arms of theca and hypandrium ventrally separated by deep invagination ( Fig. 11F, G View FIGURE 11 ); hypandrium ventrally also with strong hump ( Fig. 11F, G View FIGURE 11 ); aedeagus with ejaculatory hood medially with furrow in postero-ventral view, dorsally round; ejaculatory process short ( Fig. 11H View FIGURE 11 ); ejaculatory apodeme apically enlarged and bowl shaped.

FEMALE. Similar to male except for the following non-genitalic characters: Head ( Fig. 1J View FIGURE 1 ): frons with about anterior 1/3 shiny black and bare with posterior 2/3 shiny black and covered with yellowish pile, medially with pair of areas of white polinosity, except for 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. 6D View FIGURE 6 ): metatrochanter without calcar. Abdomen ( Fig. 2J View FIGURE 2 ): terga 2 and 3 medially slightly widen.

Material examined. SOUTH KOREA: Gangwon-do : 1♂, Hongcheon-gun , Nae-myeon , Changchon-ri , North valley of Mt. Gyebangsan, Unduryeong, 12.VIII.2008, SW Suk et al .; 2♂, Pyeongchang-gun , Yongpyeon-myeon , Nodong-ri, Nodong Valley 900m, N37°42’08” E128°28’86”, Malaise trap in forest in shade, Tripotin rec., 23.VI.– 3.VIII.2006, M. Hauser ; 1♀, Samcheok , Dogye-eup , Dogye-ri , from Amisa Temple to Dusugol, 7. VI.2003, DS Choi et al .

Distribution. Korea (new record), Russia (Southern Siberia, Russian Far East)

Remarks. The Korean specimens of this species agree well with the description and genitalic illustration by Mutin & Gilbert (1999).