Gonatopus robertsoni Olmi, Copeland & van Noort, 2019

Olmi, Massimo, Copeland, Robert S. & Noort, Simon Van, 2019, Dryinidae of the Afrotropical region (Hymenoptera, Chrysidoidea), Zootaxa 4630 (1), pp. 1-619 : 449-451

30. Gonatopus robertsoni Olmi, Copeland & van Noort , sp. nov.

( Figs 182F , 183A, B, G , 184 )

Diagnosis. Apterous ♀ of Gonatopus with palpal formula 5/3; pronotum crossed by strong transverse furrow; mesoscutum without lateral pointed apophyses ( Fig. 183A ); metanotum laterally rounded ( Fig. 183A ); meso-metapleural suture distinct and complete; metapectal-propodeal disc without strong median longitudinal furrow; enlarged claw ( Figs 182F , 183G ) with apex tapering, one big subdistal tooth located very far from most distal lamella and one row of lamellae.

Description. ♀ ( Fig. 184 ). Apterous; body length 2.7–3.0 mm (holotype 2.7 mm). Head brown, except man- dible, clypeus, malar space and anterior region of frons testaceous (in paratypes from South Africa, 33°43.745’S 21°56.972’E and 33°39.941’S 21°53.505’E, head black, except mandible, part of clypeus and two short frontal stripes along orbits testaceous-whitish); antenna brown, except ventral side of scape and flagellomeres 6–8 whitish (in paratype from South Africa, 33°43.745’S 21°56.972’E, antenna brown, except ventral side of scape and distal half of flagellomere 8 whitish; in paratype from South Africa, 33°39.941’S 21°53.505’E, antenna brown, except ventral side of scape and flagellomeres 7–8 whitish)); mesosoma and metasoma brown ((in paratype from South Africa, 33°43.745’S 21°56.972’E, mesosoma black, except lateral regions and posterior margin of pronotum and great part of mesoscutum testaceous); legs brown. Antenna clavate; antennomeres in following proportions: 9:4:9:4:4:4:4:4:4:7. Head excavated, shiny, unsculptured; frontal line complete; occipital carina absent; POL = 1; OL = 1; OOL = 7; greatest breadth of lateral ocelli longer than POL (2:1). Palpal formula 5/3. Pronotum shiny, crossed by strong transverse impression, unsculptured. Mesoscutum dull, unsculptured, laterally without pointed apophyses ( Fig. 183A ). Metanotum narrow, excavated behind mesoscutellum ( Fig. 183B ), with sides protruding; lateral protrusions of metanotum rounded ( Fig. 183A ). In paratypes metanotum little protruding, so that metapectalpropodeal disc almost fusiform. Metapectal-propodeal disc shiny, unsculptured; propodeal declivity and metapleuron transversely striate. Mesopleuron unsculptured. Meso-metapleural suture distinct and complete. Protarsomeres in following proportions: 9:2:4:11:19. Enlarged claw ( Figs 182F , 183G ) with one large subdistal tooth and one row of 6–13 lamellae (six in holotype). Protarsomere 5 ( Figs 182F , 183G ) with two rows of 15–21 lamellae (15 in holotype); apex very large ( Figs 182F , 183G ) and provided with at least 50 lamellae. Tibial spurs 1/0/1.

♂. Unknown.

Material examined. Types: ♀ holotype: SOUTH AFRICA: Eastern Cape, Schilpad Laagte Farm, 14.7 km 229° SW Kirkwood, 33°31.104’S 25°22.353’E, 9–16.II.2001, H.G. Robertson & R. Tourle leg., Winkler, VB 01- A2TN-W04, Valley Bushveld (non-trashed), SAM-HYM-A 022727 ( SAMC) . Paratypes: SOUTH AFRICA: Western Cape, Gamkaberg Nature Reserve , 33°43.745’S 21°56.972’E, 1000 m, 19.II–30.III.2010, MT, Renosterveld, S. van Noort leg. , 1♀ ( MOLC); Western Cape, Gamkaberg Nature Reserve , 33°39.941’S 21°53.505’E, 315 m,

23.XII.2008 – 16.I.2009, MT, Gamka Thicket, S. van Noort leg., SAM-HYM-A023311, 1♀ ( SAMC); Western Cape, Gamkaberg Nature Reserve , 33°43.663’S 21°57.600’E, 940 m, 31.VII–10.IX.2009, MT, Rooiberg Sandstone Fynbos, S. van Noort leg., SAM-HYM-P039007 , 1♀ ( SAMC); Western Cape, Gamkaberg Nature Reserve , 33°44.090’S 21°55.654’E, 997 m, 4.X.2010 – 25.I.2011, MT, Rooiberg Sandstone Fynbos, S. van Noort leg., GB09-FYN2-M53, SAM-HYM-A026532 , 1♀ ( SAMC) .

Hosts. Unknown.

Distribution. South Africa.

Etymology. The species is named after one of the collectors of the holotype, Dr. Hamish G. Robertson.

Figures

FIGURE 182.Chelae of Gonatopus species holotypes.A: G. hantamensis Olmi, Copeland & van Noort sp. nov. B: G. madecassus Olmi. C: G. mixtus Olmi. D: G. nicator Olmi. E: G. pluvialis Olmi. F: G. robertsoni Olmi, Copeland & van Noort sp. nov. Scale bar: A, D, F: 0.09 mm; B: 0.13 mm; C, E: 0.07 mm.

FIGURE 183. Gonatopus: group 3. A, B, G: G. robertsoni Olmi, Copeland & van Noort sp. nov.: mesoscutum + mesoscutellum + metapectal-propodeal disc + propodeal declivity in dorsal view (A) and mesosoma in lateral view (B) of ♀ holotype; chela of paratype from South Africa, 33°44.090’S 21°55.654’E (G). C, D: G. scholtzi Olmi, Copeland & van Noort sp. nov., ♀ holotype: mesoscutum + mesoscutellum + metapectal-propodeal disc + propodeal declivity in dorsal view (C) and mesosoma in lateral view (D). E, F: G. schwarzorum Guglielmino & Olmi, ♀ holotype: mesosoma in dorsal (E) and lateral (F) view. H: chela of G. ruber (Olmi), holotype. Scale bar: A, C: 0.60 mm; B: 0.90 mm; D: 0.93 mm; E, F: 1.00 mm; G: 0.07 mm; H: 0.08 mm.

FIGURE 184. Gonatopus robertsoni Olmi, Copeland & van Noort sp. nov., ♀ holotype: habitus in dorsal (A) and lateral (B) view; head in frontal view (C); chela (D).