Plumarius exophthalmus 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 : 457-458

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

( Figs 11 A–D)

Diagnosis. This species is characterized by the transverse head with prominent ocelli, the lateral ones in frontal view crossed by an imaginary line tangent to the upper margin of the eyes. The supraclypeal area in lateral view is rounded, and F1 approximately as long as distance between upper margin of clypeus and lower margin of median ocellus.

Description. Holotype, ♂. Body length 10.1 mm (paratypes 6.4–7.8 mm). Color. Body brown, with a darker spot between ocelli.

Head. 1.3 × wider than high in frontal view; wider in dorsal view than width of scutum between tegulae (5.5:5.0). OOD 1.2 × diameter of lateral ocellus; POD 0.8 × OOD. Antennocular distance 0.6 × diameter of torulus; interantennal distance 4.6 × antennocular distance. Vertex weakly reticulated, without striae, moderately punctate between lateral ocelli (punctures separated by 1 × puncture diameter). Torulus closer to lateral ocellus than to clypeus (1.3:3.0). Lateral ocelli in frontal view below upper margin of head. Median ocellus crossed by supratorular line ( Fig. 11 A). Genal carina present, distinct. Length of area between preoccipital carina and suboral swelling subequal to suboral swelling (1.6:1.4); this area without carinae; lower area of genal bridge close to mandibular articulation with weak carinae and without punctures ( Fig. 11 B). Lengths of malar area and apical width of F1 equal (0.7:0.7); malar area anteriorly striate. Supraclypeal area with lateral striae and densely punctate ( Fig. 11 C). Epistomal suture evident. Clypeus 1.2 × wider than high, densely punctate; with lateral striae and apically pointed. Proportion of lengths of segments of maxillary palp, from base to apex: 14:13:29:24:22:17. Scape without swelling or projection. F1 4.1 × as long as its apical width, subequal to scape and pedicel combined (2.9:2.8).

Mesosoma . Area anterior to pronotal lobe weakly striate; pronotal lateral carina distinct, forming a lower pocket. Notaulus weakly marked, as long as admedian line. Anterior surface of scutum moderately punctate. Propleuron and mesopleuron scarcely punctate. Metaposnotum with striae reaching posterior margin. Propodeum transverse, swollen behind spiracle; without carina anterior to spiracle. Fore wing: marginal cell with anterior margin 2.3 × as long as posterior margin; vein Rs3 shorter than vein Rs4 (3.2:4.3); vein M separated from cu-a by 0.2 × length of cu-a; discal cell rectangular. Hind wing: M and cu-a interstitial. Protarsomere 1 with four outer lateral spines; metatarsomere 1 1.3 × as long as mesotarsomere 1; inner metatibial spur 1.6 × as long as outer spur.

Metasoma. T7 triangular, apically pointed and with a polished apical margin. Genitalia as in Fig. 11 D.

Examined material. Holotype, ♂. ARGENTINA, La Rioja, 1 ♂, Chilecito, 1.III.1969, col Willink, Terán, Stange ( IFML). Paratypes: 1 ♂, same data of holotype ( IFML); 2 ♂, Chilecito, Anguiñan , 1–15.II.1969, col Willink, Terán, Stange ( IFML); 1 ♂, Ruta 40, km 593, ca. Chilecito , 7.IV.2005, Fidalgo P., Torréns ( MACN). Catamarca, 1 ♂, Belén 10 km E, Ruta 46 , 3.XI.2005, col Fidalgo P., Porter ( MACN).

Distribution. Argentina (La Rioja, Catamarca).

Etymology. The specific epithet from the Greek, exophthalmos, refers to the prominent ocelli.

Figures

FIGURE 11. Plumarius exophthalmus sp. nov., ♂. A, Head, frontal view; B, Head, ventral view; C, Head, lateral view; D, Genital capsule, ventral view. Scale bars = 0.5 mm.