Ismarus distinctus Kim, Notton & Ødegaard, 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 : 11-13

Ismarus distinctus Kim, Notton & Ødegaard sp. nov.

urn:lsid:zoobank.org:act:9654D5C2-C637-4102-93B8-EABD2FD6C45A

Fig. 4

Diagnosis

The punctured scutellum and weakly rugulose tergites are distinct characters among Palaearctic Ismarus .

Etymology

The specific name distinctus is derived from the Latin adjective, meaning distinct.

Type material (6 ♀♀, 18 ♁♁)

Holotype

NORWAY: ♀, EIS 37, AK (Akershus), Skedsmo, Asakmoen, 59.98538º N, 11.11037º E, 27 Jul. ̅ 21 Aug. 2010, MT, F. Ødegaard leg. ( NINA).

Allotype

NORWAY: ♁, EIS 11, TEY (Telemark), Kragerø, Knipenhela, 58.83077º N, 9.29692º E, 16 Jun. ̅ 14 Jul. 2015, MT, F. Ødegaard leg. (YNU).

Paratypes

NORWAY: 1 ♀, EIS 37, AK (Akershus), Skedsmo, Asakmoen, 59.98538° N, 11.11037° E, 27 Jul. ̅ 21 Aug. 2010, MT, F. Ødegaard leg. ( NINA) ; 1 ♁, EIS 28, AK (Akershus) , Oslo, Bleikøya , 59.88968º N, 10.74285º E, 26 Jun. ̅ 28 Jul. 2009, MT, A. Endrestøl leg. ( NINA) ; 1 ♁, EIS 19, VE (Vestfold), Larvik, Stavern, Agnes, 59.01560º N, 10.02295º E, 12 Jul. ̅ 14 Aug. 2012, MT, F. Ødegaard leg. ( NINA) ; 1 ♁, EIS 19, VE, Horten, Borrevann, Horten natursenter, 59.41715º N, 10.43856º E, 16 Jun. ̅ 1 Jul. 2015, MT, A. Staverløkk leg. (NINA); 1 ♀, 14 ♁♁, EIS 11, TEY, Kragerø, Knipenhela, 58.83077º N, 9.29692º E, 16 Jun. ̅ 14 Jul. 2015, MT, F. Ødegaard leg. (1 ♀, 12 ♁♁ in NINA; 2 ♁♁ in YNU); 1 ♀, EIS 28, BØ (Buskerud), Lier, Toverud, 59.91845º N, 10.34255º E, 24 Jul. ̅ 1 Oct. 2015, MT, F.Ødegaard leg. ( NINA) .

UNITED KINGDOM: 1 ♀, England, Norfolk, Santon Downham, TL818883, MT, heath with Betula & Pinus , 20̅ 30 Jul. 1985, J. Field leg. (DNPC); 1 ♀, England, Surrey, Kew, Populus italica , 22 Jul. 1979, V.F. Eastop leg. (DNPC).

Description

Female (holotype)

HEAD. Head in dorsal view much wider than long (16: 9), slightly wider than width of mesosoma (8: 7); POL: 5; LOL: 4; OOL: 3 ( Fig. 4E ); ocelli large, LOL slightly longer than diameter of lateral ocellus (9: 7); 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 much shorter than body length (11: 14); scape and pedicel with scattered setae; A3–A15 with dense and short setae; antennal segments in following proportions (length: width): 38: 13; 20: 10; 22: 9; 26: 9; 22: 9; 22: 9; 20: 10; 20:10; 18: 11; 18: 11; 18: 11; 18: 11; 18: 11; 18: 11; 28:11 ( Fig. 4D ).

MESOSOMA. Pronotum in dorsal view coarsely punctate with whitish long setae; pronotal shoulders angled; upper part of lateral pronotum predominantly smooth and concave in the middle except anterior and upper margin coarsely punctate, lower part of lateral pronotum punctate-rugose; mesoscutum smooth and convex; notauli present anteriorly as large pits; humeral sulcus deep and long, longer than length of tegula (19: 13); scutellum punctate to rugose and slightly convex, posterior rim rounded ( Fig. 4D–E ); anterior scutellar pit large and deep, shorter than rest of scutellar disc, strongly crenulate at bottom, median keel indistinct; 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, 0.70 × as long as marginal vein and 3.0 × its height ( Fig. 4D ).

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

METASOMA. Petiole short and expanded (2: 3), with strong costae dorsally; tergites weakly rugulose, with scattered setigerous punctures; base of second tergite with several short costae basally and median furrow deep basally to shallow apically, extending over half of second tergite ( Fig. 4D ); sutures between tergites complete and deeply impressed.

COLOUR. Body black; antennae uniformly bright yellow except for apical segment brownish; legs and tegulae yellow, except basal half of hind coxae black to dark-brown, hind tibiae yellowish brown; wings hyaline, covered with brown setae.

MEASUREMENTS. Head length 0.57 mm, width 0.78 mm; mesosoma length 1.13 mm, width 0.70 mm; metasoma length 1.34 mm; fore wing length 2.65 mm; total body length 3.04 mm.

Male (allotype)

Body length 2.78 mm. Similar to female, but scape and pedicel yellowish brown except dorsal part of scape dark brown, antennomeres brown, legs yellowish brown except hind tibiae and tarsus brown ( Fig. 4C ); base of second tergite with several short costae basally and median furrow deep basally to shallow apically, extending 0.65 × length of second tergite; blade-like carina on A4 percurrent ( Fig. 4B ); antennal segments in following proportions: 18: 6; 10: 6; 12: 5; 15:6; 10: 6; 10: 6; 10: 6; 10:6; 10: 6; 9: 6; 9:6; 9: 6; 9: 6; 16: 6; hind tibia slender.

Variation

Body length 2.34̅ 3.04 mm in both sexes; median furrow extending 0.6̅0.7× length of second tergite in both sexes; the strength of the rugosity of the tergites varies from weak to very weak, but it is always visible.

Host

Unknown.

Distribution

Norway, United Kingdom.

Figures

Fig. 4. Ismarusdistinctus Kim, Notton & Ødegaard sp. nov. (A, D–E. Holotype, ♀; B–C.Allotype, ♁). A. Habitus in lateral view. B. Antenna (A3–A5). C. Habitus in lateral view. D. Habitus in dorsal view. E. Head, Mesosoma in dorsal view.