Plumarius ocellatus Diez, Fidalgo & Roig-Alsina

Diez, Patricia A., Fidalgo, Patricio & Roig-Alsina, Arturo, 2013, Revision of the ocellatus species-group of the genus Plumarius Philippi 1873 (Hymenoptera, Chrysidoidea, Plumariidae), with description of three new species from Argentina, Zootaxa 3721 (1), pp. 85-91 : 86-88

Plumarius ocellatus Diez, Fidalgo & Roig-Alsina , sp. nov.

( Figs 1 A–G)

Diagnosis. Clypeus pale brown, torulus surrounded by pale spot, area between preoccipital carina and suboral swelling without median longitudinal carina, genal carina absent, forebasitarsus with six outer lateral spines.

Description. Holotype male. Length of holotype 7.5 mm (paratypes 5.9–7.5 mm). Color. Pale brown with darker head; torulus surrounded by pale spot; antenna, clypeus and mouthparts yellowish brown, mandible, with dark brown tip.

Head: 1.4 × as wide as high in frontal view; as wide as scutum between tegulae (65:65). Inner margin of orbits converging ventrally. Ocellocular distance 1.0 × diameter of lateral ocellus; postocellar distance 1.5 × ocellocular distance. Antennocular distance 0.6 × diameter of torulus; interantennal distance 4.0 × antennocular distance. Vertex medially with punctures separated by 1.5 × puncture diameter, behind lateral ocellus punctures separated by 1.0 × puncture diameter. Torulus closer to lateral ocellus than to clypeus (6:16). Lateral ocelli in frontal view reaching upper margin of head. Median ocellus crossed by supra-torular line ( Fig. 1 C). Genal carina absent. Area between preoccipital carina and suboral swelling without median longitudinal carina, its length shorter than length of swelling (6.0:11.0) ( Fig. 1 D); lower area of genal bridge close to mandibular articulation smooth, without carinae. Malar area longer than apical width of first flagellomere (60:40), weakly striate anteriorly. Supraclypeal area in frontal view with weak lateral striae extending to above upper level of torulus, medially with rounded elevation with striae and punctate, in lateral view gibbous. Epistomal suture evident. Clypeus 1.5 × wider than high with lateral striae; with apico-lateral area scarcely bent forwards; in lateral view convex medially ( Fig. 1 E). Ratios of segments of maxillary palp, from base to apex: 5:6:8:9:10:11. Scape cylindrical, without basal swellings or projections. First flagellomere 3.6 × as long as apical width, its length subequal to sum of lengths of scape and pedicel (22:23).

Mesosoma . Area anterior to pronotal lobe with weak carinae; pronotal lateral carina distinct, without lower pocket. Notaulus distinct, as long as admedian line; anterior surface of scutum densely punctate. Metapostnotum with fine longitudinal striae reaching posterior margin. Propodeum transverse. Forewing: marginal cell with anterior margin 2.4 × as long as posterior margin; vein Rs 3 shorter than Rs 4 (17:25); vein M separated from cu-a by 0.3 × length of cu-a; medial cell rectangular. Hing wing: vein cu-a postfurcal to vein M. Forebasitarsus with 6 outer lateral spines. Hind trochanter with ventral setose area; middle basitarsus shorter than hind basitarsus (45:66); inner hind tibial spur 1.3 × as long as outer spur.

Metasoma. Seventh tergum rounded at apex. Genitalia as in Fig. 1 B, F, G, aedeagus with apical lateral spines.

Type material. Holotype ♂: Argentina, province of Chubut, Pto. Pirámides, P. Valdez, 17.I.1968, Stange (IFML). Paratypes: 3 ♂, same data as holotype (IFML). Province of Buenos Aires, 1 ♂, San Blas, 32287 (MACN).

Variation. The specimen from San Blas (Buenos Aires) has a slightly darker body and the seventh tergum is basally wider than in specimens from Chubut.

Distribution. Argentina (Buenos Aires, Chubut).

Comments. The forebasitarsus in this species bears six spines on the outer side. The other two species in the group also have spines, but with a smaller number, two in P. culminatus and three in P. stangei .

Etymology. The specific epithet is Latin adjective ocellatus with referring to the ocelli, marked with spots.

Figures

FIGURE 1. Plumarius ocellatus Diez, Fidalgo & Roig-Alsina, sp. nov., ♂. A. Head, frontal view (a, height of head; b, height of clypeus); B, F, G. Genital capsule, dorsal view; C. Head, frontal view; D. Head, ventral view; E. Head, lateral view. Scale bars = 0.5 mm.