Atrichobrunettia (Pachybrunettia) triangularis Bravo

Bravo, Freddy, 2007, Descriptions of a new subgenus and two new species of Atrichobrunettia Satchell (Diptera, Psychodidae) from the Neotropical region, Zootaxa 1590, pp. 61-68 : 65

Atrichobrunettia (Pachybrunettia) triangularis Bravo , sp. nov.

( Figs. 13–20 )

Type material. BRAZIL, Pará, Santarém, Ch.N.S. Nazaré, Km 13, holotype male, 17.XI.1998, Col. RF / RAN/FLS ( INPA); 4 paratypes male, same locality, date and collector as holotype (2 paratypes, INPA; 2 paratypes, MZUEFS).

Etymology. triangularis refers to the format of the apex of sternite 10.

Diagnosis. Frontal scar patch undivided ( Fig. 13 ). Medial fork distal to radial fork ( Fig. 16 ). The distance AB between the hypandrium and the gonocoxal apodeme is 0.5x–0.7x the length of the paramere ( Fig. 2 ). Apex of sternite 10 triangular without lateral lobes ( Fig. 3 ).

Description. Male. Frontal scar patch undivided ( Fig. 13 ). Scape 1.1x the length of the pedicel ( Fig. 14 ); 1st flagellomere less rounded than the next flagellomeres ( Fig. 14 ); ascoids missing. Palpus formula = 1.3:3.5:3.8:4.8 ( Fig. 15 ). Wing with short Sc; medial fork apical to radial fork ( Fig. 16 ). Male terminalia ( Figs. 17, 18, 19, 20 ): the distance AB between the hypandrium and the gonocoxal apodeme is 0.5x–0.7x the length of the paramere; cerci with apical tenacula; tenacula with short stems and bell-shaped tips many of them lost in the specimens; epandrium sub-rectangular with large foramen; apex of sternite 10 triangular without lateral lobes.

Comments. The narrow sclerite, well sclerotized, that link the base of aedeagus to the apex of the gonocoxal apodeme in A. trilobata sp. nov. can be very short, as observed in the holotype, or long, as observed in all the paratypes. A. trilobata sp. nov. can be differentiated from the others two species of Atrichobrunettia (Pachybrunettia) by the relative position of M fork, that is apical to R fork, and by the length of the narrow sclerite, that is short in A. triangularis sp. nov. and larger in A. minuta and A. trilobata sp. nov. Other difference between the three species is the format of the apex of sternite 10, triangular in A. triangularis sp. nov., with two lateral lobes in A. trilobata sp. nov. and T inverted shape in A. minuta .

Distribution. Brazil, Pará (Santarém).

Figures

FIGURES 13 – 20. Atrichobrunettia (Pachybrunettia) triangularis Bravo, sp. nov.. Male, holotype (13, 16, 17, 20), paratype (14, 15, 18, 19). 13. Head. 14. Antenna: scape, pedicel and first flagellomeres. 15. Palpus. 16. Wing. 17. Male terminalia, dorsal, with narrow sclerite short. 18. Male terminalia, dorsal, with narrow sclerite long. 19. Cercus. 20. Male terminalia, ventral. php = post-hypandrial plate. Distance AB = distance between the hypandrium and the gonocoxal apodeme.

FIGURES 1 – 3. Atrichobrunettia (Pachybrunettia) minuta Bravo. Male, holotype. 1. Wing. 2. Male terminalia, dorsal. 3. Male terminalia, ventral. ae = aedeagus; ae. ap. = aedeagal apodem; ep = epandrium; fr = foramen; gx. ap. = gonocoxal apodeme; hyp = hypandrium; ns = narrow sclerites, well sclerotized, link the base of parameres to the apex of the gonocoxal apodeme; par = paramere; S 10 = sternite 10; php = post-hypandrial plate; T 10 = tergite 10. Distance AB = distance between the hypandrium and the gonocoxal apodeme.