Prorops mandibularis Lim

Lim, Jongok & Lee, Seunghwan, 2011, A new species of Prorops Waterston 1923 (Hymenoptera: Bethylidae) from Cambodia with a key to world species, Zootaxa 3040, pp. 25-28 : 25-27

Prorops mandibularis Lim , sp. nov.

( Figs 1–9 )

Type material. Holotype Ƥ, Central Cardamom Protected Forest, Osom Commune, Veal Veng, Pursat, Cambodia, 12°03'41.6"N 103°14'40.8"E, altitude 588 m, 17–22.viii.2010, Malaise trap, Jongok LIM leg. (SNU).

Diagnosis. FEMALE. Head longer than wide; mandible distinctly hypognathous, broad and flat with two teeth; clypeus short; pronotum trapezoidal; mesoscutum without parapsidal furrow and notauli; scutellum with anterior thin transverse groove; propodeal disc without posterior and lateral carina; metasoma smooth without puncture and microreticulation. MALE unknown.

Description. Holotype (female). Body length 2.87 mm. LFW 1.74 mm.

Color. Head dark castaneous, mandible, antenna, and frontal process castaneous. Mesosoma dark castaneous, legs yellow except coxa and femora dark castaneous, wings subhyaline, veins castaneous. Metasoma dark castaneous. Head ( Figs 2–4 ). Polished, 1.3 × as long as wide (frontal process included) with deeply concave posterior margin and posterior corners forming rounded angle in dorsal view; length of head 1.6 × as long as maximum height in lateral view. Frons and vertex polish, microreticulate with very sparse and shallow punctures. Mandible typically hypognathous with two teeth; lower tooth longer and sharpened than upper tooth; width of mandible getting wide downward, lower width 2.1 × as wide as basal width in frontal view. Frontal process 0.3 mm in length; anteriorly well-developed, apex broadly rounded, not bifid; maximum length of process 2.1 × as long as maximum basal width; maximum length of process 1.3 × as long as maximum length of mandible in lateral view; median groove continued from apex to mid line of compound eye in dorsal view. Clypeus short, apical margin truncated in ventral view; maximum length of frontal process 3.0 × length of clypeus in lateral view. Antenna twelve segmented; first five antennal segments in ratio of 3.5: 1.6: 1.1: 1.0: 1.0 in length; scape, pedicel, flagellemore 1–3,10 2.6 ×, 1.8 ×, 1.3 ×, 0.9 ×, 0.8 ×, and 2.0 × as long as wide, respectively; flagellomeres 2–8 wider than long,. Compound eye 0.22 mm long with short hairs; LE 1.0 × OOL; WF 4.1 × WOT. Ocelli forming compact angle, POL 1.1 × AOL; OOL 2.2 × WOT; posterior ocellus separated from posterior margin by 2.5 × as maximum diameter of anterior ocellus.

Mesosoma ( Figs 5–8 ). Pronotum polished, trapezoidal, 0.5 × as long as wide, strongly microreticulate without puncture, anterior corners forming obtuse angle in dorsal view. Mesoscutum polished, microreticulate without puncture; notauli and parapsidal furrow absent. Scutellum microreticulate with anterior thin transverse groove. Propodeal disc polished and parallel in dorsal view; disc 0.9 × as long as wide without lateral and transverse carina; disc almost smooth with very weak microreticulation. Declivity of propodeum smooth without median carina. Mesopleuron with one fovea in lateral view. Fore wing without pterostigma; margin densely fringed without closed cell; anal, basal, costal, and median vein absent.

Metasoma ( Fig. 9 ). Polish and smooth without microreticulation and puncture.

Remarks. Among the congeneric species, the new species can be easily distinguished from Prorops obsoleta Evans by having radial vein; from P. r a k a n Terayama by ratio of LH/WH and mandible with two teeth; from P. petila Evans by short scape, 2.6 × as long as wide and mandible with two teeth; from P. n a s u t a Waterston by mandible with two teeth, ocelli distinctly far from posterior margin of head. Most easily, the new species can be separated from congeneric species by having hypognathous mouthpart.

Etymology. The species name refers to the large and downwardly developed mandible.

Figures

FIGURES 1 – 9. Prorops mandibularis Lim, sp. nov., Ƥ. 1. Habitus, dorsal view; 2. Head, dorsal view; 3. Antenna; 4. Mandible, frontal view; 5. Mesopleuron, lateral view; 6. Pronotum, dorsal view; 7. Fore wing; 8. Propodeum, dorsal view; 9. Habitus, lateral view. Scale bar: 0.1 mm for 4; 0.2 mm for 2, 3, 5, 6, 8; 0.5 mm for 1, 7, 9.