Conganteon walkerense, Olmi, 2007

Olmi, Massimo, 2007, New species of Afrotropical Dryinidae (Hymenoptera: Chrysidoidea), with description of a new genus and a new subfamily, African Invertebrates 48 (2), pp. 199-232 : 202-204

Conganteon walkerense sp. n.

Figs 3, 4

Etymology: This species is named after the type locality, Walker Bay Nat. Res.

Description:

Female.

Fully winged; length 2.31–2.62 mm (holotype 2.31 mm). Head black, with mandibles and clypeus testaceous; antennae of holotype testaceous, with segments 7–10 brown; antennae of paratype brown, with segments 1 and 2 testaceous; mesosoma black; gaster brown; legs of holotype testaceous; legs of paratype testaceous, with coxae and clubs of mid and hind femora partly brown.Antennae clavate; antennal segments of holotype in following proportions: 8.5:5:8:6:5:4.5:4.5:4.5:4:6; antennal segments of paratype in following proportions: 8:5:8.5:6:5:5:4.5:4:4:5. Head of holotype dull, almost completely sculptured by irregular longitudinal keels, except small punctate area in front of anterior ocellus; head of paratype shiny, punctate, without sculpture among punctures; sides of face, temples and vertex behind ocellar triangle slightly rugose or sculptured by irregular keels; frontal line complete; face without lateral keels; occipital carina complete. Head of holotype with POL = 5; OL = 3; OOL = 7; OPL = 4; TL = 10; greatest diameter of posterior ocelli: 2. Head of paratype with POL = 6; OL = 3; OOL = 7.5; OPL = 5; TL = 9; greatest diameter of posterior ocelli = 2.5. Pronotum very short, transverse, reticulate rugose; pronotal tubercles reaching tegulae. Scutum punctate, without sculpture among punctures, rugose near anterior margin. Notauli incomplete, reaching approximately 0.6 length of scutum. Scutellum and metanotum smooth, finely punctate, without sculpture among punctures. Propodeum reticulate rugose, without transverse or longitudinal keels. Forewing hyaline, without dark transverse bands; distal part of stigmal vein longer than proximal part (10: 7 in holotype; 8.5: 8 in paratype). Fore tarsal segments of holotype in following proportions: 11:2:3:4.5:10.5; fore tarsal segments of paratype in following proportions: 11:2.5:2.5:5:11. Enlarged claw ( Fig. 3 ) with small subapical tooth, without bristles or hairs. Segment 5 of front tarsus ( Fig. 3 ) with 1 row of 26–31 lamellae (26 in holotype); distal apex with group of at least 7–12 lamellae (12 in holotype). Chela with rudimentary claw. Tibial spurs 1, 1, 2.

Male.

Fully winged; length 2.12–2.81 mm. Head black, with mandibles testaceous; antennae brown; mesosoma black; gaster brown; legs brown, occasionally with fore tibiae and fore tarsi testaceous. Antennae filiform; antennal segments in following proportions: 7:4:6.5:7:6:5.5:5:5:4.5:5.5. Antennal segment 9 about twice as long as broad: 4.5:2.2. Head shiny, punctate, without sculpture among punctures; sides of face, temples and vertex behind ocellar triangle slightly rugose or sculptured by irregular keels; frontal line complete; occipital carina complete; POL = 6; OL = 3; OOL = 6; OPL = 5; TL = 8; greatest diameter of posterior ocelli = 2.5. Pronotum very short, transverse, rugose. Scutum shiny, smooth, punctate, without sculpture among punctures, slightly rugose near anterior margin. Notauli distinct, incomplete, reaching approximately 0.6 length of scutum. Scutellum and metanotum shiny, punctate, without sculpture among punctures. Propodeum reticulate rugose, without transverse or longitudinal keels. Forewing hyaline, without dark transverse bands; distal part of stigmal vein longer than proximal part (11:7). Genitalia as in Fig. 4 . Tibial spurs 1, 1, 2.

Holotype: ^“ SOUTH AFRICA: Western Cape, Walker Bay Nat. Res., 34 ° 27.41'S: 19 ° 21.39'E, 11.viii– 6.ix.1997, S. van Noort ”; [red] “ Conganteon walkerense sp. n. M. Olmi det. 2005 ^” (SAMC).

Paratypes: SOUTH AFRICA: Western Cape: Koeberg Nat. Res., 33 ° 37.62'S: 18 ° 24.26'E, 23.i–20.ii.1998, yellow pan trap, S. van Noort, 1^1ơ (SAMC) ; same locality label, 20.iii–19.iv.1998, 1ơ (SAMC) ; same locality label, 23.i–20.ii.1998, 1ơ (MOLC) .

Hosts: Unknown.

Comparison: The female of C. walkerense is similar to that of C. transvaalense Olmi, 1990 , but the basal part of segment 5 of fore tarsi is much shorter than distal part Fig. 3 ), whereas in C. transvaalense it is about as long as distal part (Olmi 1990 b, fig. 4H). The male of C. walkerense is similar to that of C. vannoorti Olmi, 2006 , but the head is black, with only mandibles testaceous (head black, with mandibles, clypeus and anterior region of face testaceous in C. vannoorti ), the antennal segment 9 is about twice as long as broad (more than 3 times as long as broad in C. vannoorti ) and the frontal line is distinct (evanescent in C. vannoorti ).

Figures

Figs 3, 4. Conganteon walkerense sp. n.: (3) chela of female holotype, scale bar = 0.04 mm; (4) genitalia of male paratype, scale bar = 0.08 mm.