Ismarus excavatus Kim & Lee, 2018

Kim, Chang-Jun, Notton, David G., Ødegaard, Frode & Lee, Jong-Wook, 2018, Review of the Palaearctic species of Ismaridae Thomson, 1858 (Hymenoptera: Diaprioidea), European Journal of Taxonomy 417, pp. 1-38 : 16-19

Ismarus excavatus Kim & Lee sp. nov.

urn:lsid:zoobank.org:act:1BFEA38D-668E-43F6-9344-31427751E70A

Fig. 5

Diagnosis

Ismarus excavatus sp. nov. is quite distinct from other described Palaearctic species in the male sex segment; A4 is distinctly excavate, and curved.

Etymology

This species is named excavatus in recognition of the strongly excavated male A4.

Type material (4 ♀♀, 11 ♁♁)

Holotype

JAPAN: ♀, Aomori, Tsuta, Onsen area , alt. 500 m, 40°10′ N, 140°57′ E, 22 Aug. 1996, L. Masner leg. ( CNCI).

Allotype

JAPAN: ♁, same collecting data as for holotype (CNCI).

Paratypes

CHINA: 1 ♁, Jilin-seong , Helong-si , Xicheong-jin, Mingyan-chon, 42°32′48″ N, 129°00′38″ E, 8̅ 15 Jun. 2009, MT, J.W. Lee leg. ( YNU); 1 ♁, same collecting data, 15̅ 22 Jun. 2009, MT, J.W. Lee leg. ( YNU); 5 ♁♁, same collecting data, 22̅ 29 Jun. 2009, MT, J.W. Lee leg. ( YNU); 1 ♁, same collecting data , 29 Jun. ̅ 6 Jul. 2009, MT, J.W. Lee leg. (YNU).

JAPAN: 2 ♁♁, 1 ♀, same collecting data as for holotype ( CNCI).

SOUTH KOREA: 1 ♀, Chungcheongbuk Province, Boeun-gun, Songnisan-myeon, Sanae-ri 209, Beopjusa , 36°32′30″ N, 127°50′12″ E, 5 May ̅ 31 Aug. 2011, J.C. Jeong leg. ( YNU) ; 1 ♀, Jeollabukdo, Jeongeup-si, Singjeong-dong , Mt. Naejang , Namchanggol , 36°32′30″ N, 127°50′12″ E, 30 May ̅ 5 Aug. 2011, NT, J.W. Lee leg. ( YNU).

Description

Female (holotype)

HEAD. Head in dorsal view much wider than long (13: 7), slightly wider than width of mesosoma (1 3: 11); POL: 14; LOL: 7; OOL: 10 ( Fig. 5C ); ocelli large, LOL slightly longer than diameter of lateral ocellus (7: 6); vertex behind ocelli nearly flat in lateral view; eye large and without setae; inner orbits, frons and temple with few sparse setae; above antennal sockets, face and cheek with numerous long setae; antenna shorter than body length (3: 4); scape and pedicel with scattered setae; A3–A15 with dense and short setae; antennal segments in following proportions (length:width): 21: 6; 10: 5; 12: 4; 13: 5; 10: 5; 10: 6; 10: 7; 10: 7; 10: 7; 10: 7; 9: 7; 9:7; 8: 7; 8: 7; 15: 7 ( Fig. 5A ).

MESOSOMA. Pronotum in dorsal view punctate-rugose with whitish long setae along the posterior margin; pronotal shoulders angled; lateral pronotum predominantly punctate to punctate-rugose except smooth and concave in the middle; mesoscutum smooth and convex; notauli present anteriorly as large pits ( Fig. 5D ); humeral sulcus fine, longer than tegula (9: 7); scutellum smooth and slightly convex, posterior rim rounded ( Fig. 5D ); anterior scutellar pit large and deep, shorter than remaining scutellar disc, weakly crenulate at bottom, median keel present ( Fig. 5D ); mesopleuron predominantly smooth with deep crenulate line along posterior margin; metapleuron rugose and covered with dense long setae.

WINGS. Fore wing with costal, subcostal, basal, marginal, postmarginal, radial and stigmal veins tubular; medial vein pigmented; radial cell closed, as long as marginal vein and 3.0 × its height ( Fig. 5B ).

LEGS. Fore and mid legs slender; hind tibiae gradually swollen.

METASOMA. Petiole slightly shorter than wide (5: 6), strong costae dorsally; tergites completely smooth, with scattered setigerous punctures; base of second tergite with several short costae basally and short and shallow median furrow, extending 0.35 × length of second tergite; sutures between tergites complete and deeply impressed.

COLOUR. Body black; antennae yellowish brown basally gradually darkened towards apex; legs yellowish brown, except basal half of hind coxae blackish brown, hind femur partly brown, hind tibiae dark brown; tegulae yellowish brown; wings hyaline, covered with brown setae.

MEASUREMENTS. Head length 0.44 mm, width 0.82 mm; mesosoma length 1.02 mm, width 0.69 mm; metasoma length 1.23 mm; fore wing length 2.45 mm; total body length 2.69 mm.

Male (allotype)

Body length 1.93 mm. Similar to female, but antenna uniformly brown to dark brown except scape and pedicel yellowish, basal half of all coxae dark brown ( Fig. 5F ); median furrow short and shallow, extending 0.4× length of second tergite; A4 excavate, curved ( Fig. 5E ); antennal segments in following proportions: 15: 6; 7: 5; 8: 4; 12: 5; 7:8; 7: 5; 7: 5; 7:5; 6: 5; 6: 5; 6: 5; 7: 5; 7: 5; 11: 5 ( Fig. 5E ).

Variation

Body length 1.93̅ 2.76 mm in both sexes; median furrow extending 0.35̅0.4 × length of second tergite in both sexes.

Host

Unknown.

Distribution

China (Jilin) , Japan (Aomori) , South Korea.

Figures

Fig. 5. Ismarus excavatus Kim & Lee sp. nov. (A–D. Holotype, ♀; E–F. Allotype, ♁). A. Antenna. B. Habitus in lateral view. C. Head in dorsal view. D. Mesosoma in dorsal view. E. Antenna (A3–A5). F. Habitus in lateral view.