Rhabdepyris demissus Stein & Azevedo, 2007

Stein, P. R. W. & Azevedo, C. O., 2007, Synopsis of lobatifrons species-group (Hymenoptera: Bethylidae, Rhabdepyris) from Neotropical region, with redefinition of the group, Zootaxa 1444 (1), pp. 23-34 : 30

Rhabdepyris demissus Stein & Azevedo , New Species

( Fig. 23–29 )

Diagnosis. Propodeal disc with five discal carinae and a pair of additional carinae beside median one. Scutellar groove shallower than scutellar pit. Aedeagus apex lower than cuspis apex in lateral view.

Description. Holotype. Male. Body length 5.28 mm. LFW 3.00 mm. Body and coxae black; mandible and antenna castaneous; palpi, tegula, fore and mid femora, tibiae and tarsi light castaneous; hind femur dark castaneous; wings subhyaline, veins and stigma castaneous.

Head ( Fig. 23 ). Mandible with five apical teeth, uppermost tooth as large as subupper ( Fig. 24 ). Median lobe of clypeus angulate, median carina complete. Length of first four antennal segments in ratio of 17:7:12:12 ( Fig. 25 ). Frons coriaceous and punctate. WH 0.97x LH; WF 0.61x WH; WF 1.11x HE; OOL 1.41x WOT; frontal angle of ocellar triangle acute; distance from posterior ocelli to vertex crest 0.50x DAO. Vertex straight; corner rounded; temple slightly divergent. VOL 0.53x HE.

Mesosoma ( Fig. 23 ). Dorsum of thorax coriaceous and punctate. Notaulus convergent, wide posteriorly. Parapsidal furrow straight, short and on posterior 0,75x of mesoscutum. Scutellar groove shallower than scutellar pit. Propodeal disc 1.62x as wide as long, with five discal carinae and a pair of lateral carinae, with a pair of additional carinae nearly complete beside median one; median carina complete and straight; paramedian complete, straight; lateral discal carina incomplete, straight in anterior half and arched in posterior half, wholly convergent, not touching paramedian carina; lateral carina complete, followed for shallow linear depression; space among discal carinae striate; lateral space on discal carinae polished; declivity coriaceous with median carina; propodeal side strigulate. Mesopleuron ( Fig. 26 ) with upper fovea subrounded; lower fovea elongate and closed, middle area wider than anterior area, upper margin wholly outlined medially. Fore femur 2.05x as long as wide.

Genitalia ( Fig. 27–29 ). Paramere slender, shorter than basiparamere; apex narrow and rounded; dorsal margin convex; ventral margin convex; base concave, developed dorsally. Appendicular process of cuspis with base width 0.3x process width; apex angulate and touching transversal portion of cuspis. Aedeagus apex as high as cuspis apex in lateral view, median portion abruptly narrow.

Material examined. Holotype. Male. PERU, Madre de Dios, Panticolla Lodge , 400 m, 25–26.X.2000, FIT, R. Brooks col. ( CNCI) . Paratype. BRAZIL, Mato Grasso , 1 male, Sinop, XI.1975, M[alaise] t[rap], M. Alvarenga col. ( CNCI) .

Distribution. Brazil and Peru.

Etymology. The specific epithet from Latin refers to the short aedeagus.

Variation. Temple parallel; propodeal disc with a pair of additional carinae present on posterior half of disc beside median one ( Fig. 30 ), lateral discal carina straight, convergent posteriorly, touching paramedian carina; mesopleural lower fovea with middle area more constricted than anterior area; paramere with dorsal and ventral margin straight, and appendicular process of cuspis with base width 0.7x process width ( Fig. 31 ).

Remarks. It is similar to R. atlanticus by having mandible with five apical teeth, uppermost tooth as large as subupper, frontal angle of ocellar triangle acute, vertex straight, scutellar groove shallower than scutellar pit, propodeal disc with five discal carinae and a pair of lateral carinae with a pair of additional carinae nearly complete beside median one, paramedian carina complete, lateral discal carina wholly convergent, mesopleuron with upper fovea subrounded and lower fovea elongate, closed and wholly outlined medially, paramere with apex rounded, dorsal margin convex and base concave, developed dorsally, appendicular process with apex touching transversal portion of cuspis, aedeagus apex as high as cuspis apex in lateral view and median portion abruptly narrow. Rhabdepyris demissus , however, has the frons and dorsum of thorax coriaceous and punctate, the temple slightly divergent, the paramedian carina straight, the lateral discal straight in anterior half and arched in posterior half, not touching paramedian carina, the lateral space on discal carinae polished, the propodeal side strigulate, the paramere slender, shorter than basiparamere with apex narrow and ventral margin convex, and the appendicular process with base one third as wide as own process and apex angulate, whereas R. atlanticus has the frons and dorsum of thorax polished and punctate, the temple parallel, paramedian carina divergent posteriorly, lateral discal wholly arched, touching paramedian carina, the lateral space on discal carinae coriaceous, the propodeal side coriaceous, the paramere wide, about as long as basiparamere with apex wide and ventral margin straight, and the appendicular process with base as wide as own process and apex rounded.

Figures

FIGURES 23–45. 23–29. Rhabdepyris demissus sp. nov. holotype. 23. Head and mesosoma in dorsal view; 24. Mandible in frontal view; 25. Antenna in frontal view; 26. Mesopleuron in frontal view; 27–29. Genitalia. 27. Ventral view; 28. Dorsal view; 29. Lateral view. 30–31. R. demissus sp. nov. holotype. 30. Propodeal disc in dorsal view; 31. Appendicular process in lateral view. 32–34. Appendicular process of R. septemlineatus. 35–36. R. quinquilineatus. 35. Mandible in frontal view; 36. Aedeagus in ventral view. 37–45. R. luteipennis. 37. Aedeagus in ventral view. 38. Mesopleuron with long upper fovae in lateral view; 39. Mesopleuron with short upper fovae in lateral view; 40. Mandible in dorsal view; 41. Propodeal disc in dorsal view; 42. Notaulus in dorsal view; 43. Mandible in dorsal view; 44. Propodeal disc in dorsal view; 45. Notaulus in dorsal view. (scale bar = 250µm).