Plumarius globulosus 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 : 448-449

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

( Figs 4 A–E)

Diagnosis. This species is distinguished among all other species of Plumarius by the globular prominence in the middle of the clypeus and the presence of a median, longitudinal carina on T7.

Description. Holotype, ♂. Body length: 7.9 mm (paratypes 5.9–8.7 mm). Color. Light brown, with following areas darker: spot between ocelli, tegulae, and T7.

Head. 1.2 × as wide as high in frontal view; wider than scutum between tegulae in dorsal view (54:48). OOD 1.1 × diameter of lateral ocellus; POD 1.1 × OOD. Antenocular distance 0.5 × diameter of torulus; interantennal distance 4.4 × antenocular distance. Vertex finely reticulated and moderately punctate between lateral ocelli (punctures separated by 1.5 × puncture diameter). Torulus closer to lateral ocellus than to clypeus (15:20). Lateral ocelli in frontal view below upper margin of head. Median ocellus crossed by supra-torular line ( Fig. 4 A). Genal carina absent. Length of area between preoccipital carina and suboral swelling longer than length of suboral swelling (7.0:5.0); this area without a median, longitudinal carina ( Fig. 4 B); lower area of genal bridge close to mandibular articulation without carinae or punctures Malar area longer than apical width of F1 (8.0:5.0); without striae. Supraclypeal area with weak lateral striae; weakly rounded in lateral view. Epistomal suture scarcely evident. Clypeus 1.5 × wider than high, with a globular prominence in the middle and with weak lateral striae; apical margin rounded, not truncate ( Fig. 4 C). Proportion of lengths of maxillary palp segments from base to apex, 7:7:10:11:8:10. Scape with a basal, rounded, ventral projection. F1 4.6 × as long as its apical width, equal to scape and pedicel combined (2.8:2.8).

Mesosoma : Area anterior to pronotal lobe smooth; pronotal lateral carina distinct, forming weak lower pocket. Notaulus weakly marked, as long as admedian line. Anterior surface of scutum moderately punctate. Propleuron and mesopleuron moderately punctate. Metapostnotum with longitudinal striae reaching to posterior margin. Propodeum transverse; swollen behind spiracle; without carina anterior to spiracle. Fore wing: marginal cell with anterior margin 2.4 × as long as posterior margin; vein Rs3 shorter than Rs4 (1.7:2.2); vein M separated from cu-a by 0.7 × length of cu-a; discal cell rectangular. Hind wing: vein cu-a postfurcal to vein M. Protarsomere 1 with fifteen outer lateral spines. Length of mesotarsomere 1 shorter than metatarsomere 1 (3.6:5.3); inner metatibial spur 1.2 × as long as outer spur.

Metasoma. T7 with median, longitudinal carina and concave at both sides of carina; apically with a polished rim ( Fig. 4 D). Genitalia as in figure 4E.

Examined material. Holotype, ♂: ARGENTINA, La Rioja, 7 km N de Santa Teresita, 18.II.2006, with light, col Fidalgo P., Fidalgo G. ( MACN). Paratypes: 15 ♂, same data as holotype ( MACN); 3 ♂, same data as holotype ( IFML); 3 ♂, same data as holotype ( MLP); 1 ♂, Termas de Santa Teresita, 19.II.2005, col Fidalgo P., Fidalgo G., Torréns, at light ( MACN); 1 ♂, Santa Teresita, 28°35´57ʹʹS, 66°33´44ʹʹW, 21–22.XII.2009, col Fidalgo P., Torréns, YPT, sand dune ( MACN); 1 ♂, Termas de Santa Teresita, 18.II.2006, col Fidalgo P., Fidalgo G., at light (IADIZA); 10 ♂, Santa Teresita, 18.XI.2006, col Fidalgo P. ( MACN, in alcohol); 1 ♂, 7 km E Anillaco, 17.II.2006, col Fidalgo P., Torréns, at light ( MACN); 1 ♂, Udpinango, 16.II.2006, col P. Fidalgo P. ( MACN); 10 ♂, Pituil, R 40, km 3451– 52, 26.XI.2012, col Diez, Fidalgo P. ( MACN in alcohol). Catamarca, 1 ♂, Ruta Nacional 45, Km 1280 ca. Río Colorado, 10.IV.2005, col Fidalgo P. ( MACN); 1 ♂, Ruta 46, 66 km entre Belen y Andalgala, 1.II.2006, col Fidalgo P. ( MACN in alcohol). San Juan, 2 ♂, Ruta 141, km 173 ca. Caucete, 14.I.2006, col Fidalgo P. ( MACN).

Distribution. Argentina (Catamarca, La Rioja, San Juan).

Variation. The specimens from Udpinango and Anillaco (La Rioja) have the protarsomere 1 with seven outer lateral spines and the body color is dark brown. The specimens from San Juan have the protarsomere 1 with five outer lateral spines approximately. Some specimens from Santa Teresita (La Rioja) have the protarsomere 1 with five outer lateral spines, and the median longitudinal carina on T7 is weak.

Etymology. The specific epithet, the Latin adjective globulosus , refers to the globular prominence of the clypeus.

Figures

FIGURE 4. Plumarius globulosus sp. nov., ♂. A, Head, frontal view; B, Head, ventral view; C, Head, lateral view; D, T 7, longitudinal carina; E, Genital capsule, ventral view. Scale bars = 0.5 mm.