Thaumamannia vanderdrifti, Van Doesburg, 1977

Thaumamannia vanderdrifti View in CoL

Van Doesburg, 1977 ( Fig. 36 View Figure 36 )

Diagnosis: This is the largest species of the genus and it is the only known species of Thaumamannia to present a laterally projected edge of the anterior branch tip of the peritreme, forming a sulcus that is even noticeable in dorsal view.

Redescription: Body: Dark brown, slightly lighter on paranota and costal area; antennae, rostrum and legs even lighter ( Fig. 36A View Figure 36 ). Head: Strongly declined, pubescent; antenniferous process about half of the scape length; pedicel mora than two times the scape length, slightly smaller than basiflagellomere, distiflagellomere one and a half times the pedicel length; eyes reduced with few ommatidia; bucculae round, smooth and pubescent on its border, widest anteriorly, with few punctures near insertion with the head, these big and deeply impressed, posterior border concave ( Fig. 36F View Figure 36 ); rostrum reaching at least the third abdominal segment ( Fig. 36B, C View Figure 36 ). Thorax: Pubescent; coarsely punctate including few punctations on the middle of callus region; anterior and posterior border straight; paranota explanate, with few punctations, bearing scale-like projections on its border, projected frontwards surpassing the eyes; scutellum large, almost one-ninth of pronotum maximum width ( Fig. 36E View Figure 36 ); sternal laminae narrow, punctate. Hemelytra: Coriaceous, coleopteroid, ovate, densely pubescent and remarkably convex; carina-like vein extending from the anterior border to the posterior third of the hemelytra; deeply and evenly punctate; costal area with scale-like projections on its border, with one row of inner punctures, anterior border round, revealing scent gland dorsally. Scent gland: Anterior branch gradually projected laterally, tip tilted horizontally, large, almost half the size of the rest of the anterior branch, much more projected than base of anterior branch, edges definitely thicker on the tip, these, unevenly laterally projected to the point of being observable dorsally ( Fig. 36D View Figure 36 ); posterior branch strongly curved distally, with considerably enlarged tip with cracked texture; sulcus prominent on both branches, fading only distally on the anterior branch tip; evaporatorium with straight border anteriorly, only slightly projected on mesopleuron ( Figs 17D View Figure 17 – 36C View Figure 36 ).

Measurements: BL, 2.29 (2.16–2.37 xM; 2.30–2.39 xF); BW, 1.51 (1.37–1.48 xM; 1.56–1.65 xF); HL, 0.12 (0.08–0.17 xM; 0.10–0.15 xF); HW, 0.47 (0.42–0.51 xM; 0.46–0.51 xF); ID, 0.27 (0.25–0.30 xM; 0.25–0.29 xF); PL, 0.53 (0.46–0.55 xM; 0.55–0.57 xF); PW, 1.23 (1.06– 1.22 xM; 1.27–1.37 xF); AS, 0.13 (0.13– xM; 0.11–0.13 xF); AP, 0.30 (0.29–0.30 xM; 0.29–0.30 xF); AB, 0.39 (0.36–0.42 xM; 0.40 xF) and AD, 0.46 (0.46 xM).

Distribution: Described from Suriname by Van Doesburg (1977) and reported in the Brazilian state of Pará by Guidoti et al. (2014).

Material examined: Other specimens: BRAZIL: Pará: Parauapebas, Caverna GEM 1784 (Est. Úmida) [ GCLBN5 ] [ Guidoti PhD – FR036] [Guidoti PhD – 1xM, Vianaidinae 049] ( GC) ; BRAZIL: Pará: Parauapebas, Gruta S 11 D-081 [Guidoti PhD – Extraction #261] [ GCLBN8 ] [ Guidoti PhD – FR038] [Guidoti PhD – 1xF, Vianaidinae 050] ( GC) ; BRAZIL: Pará: Parauapebas, Gruta S 11 D-99 [ GCLBN10 ] [ Guidoti PhD – FR042] [Guidoti PhD – 1xF, Vianaidinae 051] ( GC) ; BRAZIL: Pará: Parauapebas, D-82 [ GCLBN11 ] [Guidoti PhD – FR043] [ Guidoti PhD – 1xF, Vianaidinae 052] ( GC) ; BRAZIL: Pará: Canaã dos Carajás, Gruta S11 12 [ GCLBN9.2 ] [ Guidoti PhD – FR039] [Guidoti PhD – 1xM, Vianaidinae 053] ( GC) ; BRAZIL: Pará: Canaã dos Carajás, Gruta S11 12 [Guidoti PhD – Extraction #262] [ GCLBN9.3 ] [ Guidoti PhD – FR041] [Guidoti PhD – 1xM, Vianaidinae 054] ( GC) .