Plumarius ocellulatus Diez & Roig-Alsina

Diez, Patricia A. & Roig-Alsina, Arturo, 2016, Revision of Plumarius Philippi 1873 (Hymenoptera: Chrysidoidea, Plumariidae) from Argentina north of Patagonia, with description of eighteen new species, Zootaxa 4098 (3), pp. 442-470 : 467-468

Plumarius ocellulatus Diez & Roig-Alsina , sp. nov.

( Figs 20 A–D)

Diagnosis. This species falls in a group with the anterior ocellus above the supra-torular line and the marginal cell with the anterior margin short and the apex not narrowed. It is related to P. fidalgoi by the torulus at nearly equal distance from the lateral ocellus and the clypeus. It differs from this species by the extremely small ocelli, the lateral ones being nearly circular and separated from eye by 2.3–2.5 × their maximum diameter and the aedeagus without lateral spines.

Description. Holotype, ♂. Body length 4.9 mm (paratypes 3.6–4.2 mm). Color. Dark brown, with cleared mandible, antennae and legs.

Head. 1.1x wider than high in frontal view; in dorsal view width is subequal than width of scutum between tegulae (5.6:5.7). OOD 2.5 × diameter of lateral ocellus; POD 1.0 × OOD. Antennocular distance 0.8 × diameter of torulus; interantennal distance 3.6 × antennocular distance. Vertex finely reticulated, without punctures between lateral ocelli. Torulus nearly as close to lateral ocellus as to clypeus (1.4:1.5). Lateral ocelli in frontal view below upper margin of head. Median ocellus above supra-torular line ( Fig. 20 A). Genal carina present, weak. Length of area between preoccipital carina and suboral swelling shorter than length of suboral swelling (1.2:1.6); this area without a median longitudinal carina; lower area of genal bridge close to mandibular articulation without carinae or punctures ( Fig. 20 B). Malar area subequal than apical width of F1 (0.6:0.7), weakly striate anteriorly. Supraclypeal area with weak lateral striae; convex in lateral view ( Fig. 20 C). Epistomal suture evident. Clypeus 1.3 × wider than high, with weak lateral striae; rounded in lateral view; not truncate. Proportion of lengths of segments of maxillary palp, from base to apex: 10:9:14:16:15:11. Scape without swelling or projection. F1 5.2 × as long as its apical width, subequal to scape and pedicel combined (3.0:2.9).

Mesosoma . Area anterior to pronotal lobe smooth; pronotal lateral carina distinct, forming a lower pocket. Notaulus weakly marked, as long as admedian line. Anterior surface of scutum scarcely punctate. Propleuron and mesopleuron scarcely punctate. Metapostnotum with striae reaching posterior margin. Propodeum transverse, not swollen behind spiracle, with carina anterior to spiracle. Fore wing: marginal cell with anterior margin 1.2 × as long as posterior margin; vein Rs3 longer than length Rs4 (2.2:1.6); vein M separated from vein cu-a by 0.5 × length of cu-a; discal cell rectangular. Hind wing: vein cu-a postfurcal to vein M. Protarsomere 1with one outer lateral spine. Length of mesotarsomere 1 shorter than metatarsomere 1 (2.6:3.6); inner metatibial spur 1.4 × as long as outer spur.

Metasoma. T7 apically rounded. Genitalia as in Fig. 20 D, aedeagus without lateral spines.

Examined material. Holotype, ♂. ARGENTINA, Catamarca, 1 ♂, ca. Amaicha del Valle, Ruta 307, km 122, 2.XI.2005, col Fidalgo P., Porter ( MACN). Paratypes: 6 ♂, same data of holotype, ( MACN). Tucumán, 1 ♂, Amaicha, 27.XI.1965, col Stange ( IFML); 1 ♂, entre Amaicha y Sta. María, 28.XI.2005, col Fidalgo P., Torréns ( IFML).

Distribution. Argentina (Catamarca, Tucumán).

Etymology. The species name, diminutive of Latin ocellus, refers to the small ocelli of the species.

Figures

FIGURE 20. Plumarius ocellulatus sp. nov., ♂. A, Head, frontal view; B, Head, ventral view; C, Head, lateral view; D, Genital capsule, ventral view. Scale bars = 0.5 mm.