Ismarus laevigatus, Kim, Chang-Jun, Copeland, Robert S. & Notton, David G., 2018

Kim, Chang-Jun, Copeland, Robert S. & Notton, David G., 2018, The family Ismaridae Thomson (Hymenoptera, Diaprioidea): first record for the Afrotropical region with description of fourteen new species, African Invertebrates 59 (2), pp. 127-163 : 142-144

Ismarus laevigatus sp. n. Figure 7A− E

Diagnosis.

Ismarus laevigatus sp. n. is similar to I. spinalis Kolyada & Chemyreva, 2016 from the Palaearctic region. It differs mainly in the female antennal segments ratio and male antennal structure: in I. spinalis A7-A14 subquadrate, male A3 and A4 with sharp keels; in I. laevigatus sp. n. A7-A14 slightly longer than wide, male A4 with blade carina.

Type material

(2♀♀9♂♂). Holotype, 1♀, SOUTH AFRICA: 75 km West South West of Natal, Estcourt, Cathedral Peaks Forest Station, 1500 m alt., 7-31.XII.1979 (MT), S. & J. Peck leg., CJDAF010082 (deposited in CNCI). Allotype, 1♂, SOUTH AFRICA: 75 km West South West of Natal, Estcourt, Cathedral Peaks Forest Station, 1500 m alt., 7-31.XII.1979 (MT), S. & J. Peck leg., CJDAF010084 (CNCI). Paratype, SOUTH AFRICA: 1♀5♂♂, 75 km West South West of Natal, Estcourt, Cathedral Peaks Forest Station, 1500 m alt., 7-31.XII.1979 (MT), S. & J. Peck leg., CJDAF010083, 010085-010089 (CNCI); 1♂, ditto, 11-31.X.1979 (MT), S. & J. Peck leg. (CNCI); 1♂, E. Cape Province, Katberg, 4000 ft alt., XII.1932, R. E. Turner leg., CJDAF010090 (NHMUK); 1♂, ditto, 14-26.XI.1932, R. E. Turner leg., CJDAF010091 (NHMUK).

Description.

Holotype (Female). Head. Head in dorsal view much wider than long (3:2), slightly wider than width of mesosoma (25:23) (Fig. 7 A–B); POL: 11; LOL: 6; OOL: 9 (Fig. 7B); ocelli large, LOL slightly longer than diameter of lateral ocellus (12:11); 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 few long setae; antenna much shorter than body length (13:18); scape and pedicel with scattered setae; A3-A15 with dense and short setae; antennal segments in following proportions (length:width): 18:5; 7:4; 10:3; 10:2.5; 8:4; 6:4.5; 6:4.5; 6:4.5; 6:5; 6:5; 6:5; 6:5; 6:5; 6:6; 11:5 (Fig. 7A).

Mesosoma. Pronotum in dorsal view punctate-rugose with whitish long setae; pronotal shoulders angled; upper part of lateral pronotum smooth and concave in the middle, lower part of lateral pronotum punctate-rugose; mesoscutum smooth and convex with pairs of long setae in front of scutellar pit; notauli present anteriorly as large pits (Fig. 7D); humeral sulcus deep and short, as long as length of tegula; scutellum smooth and slightly convex, posterior rim rounded (Fig. 7D); anterior scutellar pit large and deep, shorter than remaining scutellar disc, slightly crenulate at bottom, median keel present (Fig. 7D); mesopleuron smooth with deep crenulate line along posterior margin; metapleuron punctate to rugose and covered with dense whitish long setae.

Wings. Radial cell completely closed, 2.1 × as long as wide and as long as marginal vein (Fig. 7A).

Legs. Fore and mid legs slender; hind tibiae incrassate posteriorly, its maximum width slightly wider than hind femora (9:8).

Metasoma. Petiole subquadrate, rugose dorsally; tergites smooth, with scattered setigerous punctures; base of second tergite with several short costae basally and very long median furrow, 0.90 × length of second; sutures between tergites complete and deeply impressed.

Colour. Body black; antennae, tegulae and legs uniformly yellow except inner part of tibiae brown; wings hyaline, covered with brown setae.

Measurements. Head length 0.47 mm, width 0.74 mm; mesosoma length 0.97 mm, width 0.69 mm; metasoma length 1.20 mm; fore wing length 2.52 mm; body length 2.63 mm.

Male (Allotype). Body length 1.88 mm. Similar to female, POL: 8; LOL: 5; OOL: 7; body dark brown except metasoma brown, antennae brown except scape and pedicel yellow, legs yellow except hind tibiae and tarsi yellowish brown to brown; anterior margin of lateral pronotum rugose; blade-like carina on A4 percurrent (Fig. 7E); antennal segments in following proportions: 13:4; 7:3.5; 7:3.5; 7:3.5; 5:4; 5:4; 5:4; 5:4; 5:4; 5:4; 5:4; 5:4; 5:4; 8:4 (Fig. 7C).

Variation.

Body length 1.88-2.63 mm in both sexes. Median furrow very long extending 0.8−0.9 × length of second tergite in both sexes.

Distribution.

South Africa.

Etymology.

The specific name laevigatus is derived from the Latin adjective which means smooth.