Megaoculis guyanensis (Rheinheimer) Rheinheimer, 2011

Pelsue, Frank W. & O’Brien, Charles W., 2011, A redefinition of the Curculionini of the world, with a key to subtribes and genera, and two new genera: Pseudoculio and Megaoculis (Coleoptera: Curculionidae: Curculioninae), Zootaxa 3102, pp. 27-49 : 47-48

Megaoculis guyanensis (Rheinheimer) comb. n.

Type species: Curculio guyanensis Rheinheimer 2006: 429

Holotype Ƥ Camp Caiman /Cayenne/GUY/ 26.3.2003 /Rheinheimer leg. ( SMTD) Paratypes (4) same data as holotype (JRC).

Material examined: (1) 3 ( Brazil): “ BRAZIL, Para Tucurui, I-1979, M. Alvarenga” ( CWOB). (2) 3 “ French Guiana /AmazoneNaturalLodge/ 30km SE Roura on Kaw /Rd, 10/18/-4-2007. [2nd label] “DG Hall & JE Eger/ 300m. N04º33” 570/W052º12.433, MV light” (1 FWPC) (1 CWOB) 1 Ƥ same data as 3; Ƥ “ French Guiana / 33km, SE Roura on/Kaw Rd, 16-17-4-2007 /J. E. Eger & D. G. Hall” [2nd label] “ 227m. N04º34.135’,/ W052º11.150’ MV light” (2 FWPC).

Redescription: Habitus (Figs. 61–62) 3 5.5–6.5 mm (median=6.0 mm, n=5) in length; 2.6 mm (median= 2.6 mm, n=5) in width. Head: Large; clothed with narrow elongate, apically acute, fulvus scales; eyes large, posterior margin reaching margin of pronotum; gena clothed with long narrow elongate fulvus scales; frons 0.16 as broad as head across eyes; clothed with similar scales. Rostrum: 2.2 mm in length; 0.4 as long as body; derm light brown; base wider than frons; apex with several, long, seta-like scales; apex enlarged; scrobe lateral; scape reaching eye, inserted near midpoint. Antennae: Scape 0.8 mm, funicle 1.1 mm in length, scape 0.7 as long as funicle; club 0.4 mm; funicular antennomere 1 slightly longer than 2 (subequal), 2 and 3 same length, 4 and 5 same length, but not as long as 3, 6 shorter than 7, 7 same length as 5; club oval-acuminate, with long seta-like scales, club as long as funicular antennomeres 5–7. Thorax: 1.0 mm in length, 1.8 mm in width; 0.55 as long as wide; derm fuscous; side margin linear for 5/6 of length, then abruptly narrowed to broad constriction; clothed with decumbent, large, long, narrow, apically acute, fulvus scales; propleuron compressed laterally clothed with similar scales as disc, appearing hairy; mesosternal intercoxal process not prominent; scutellum with circumscutellar and postscutellar areas of elytra not impressed; moderate-sized; longer than broad; densely clothed with long fulvus scales; mesepimeron and mesepisternum sparsely clothed with narrow, elongate, fulvus scales; metepisternal anterior margin broad, narrowing to posterior margin, and clothed with narrow elongate fulvus scales; sterna with similar vestiture. Elytra: Derm fuscous; striae shallow, consisting of deep punctures: each puncture with emerging, narrow, elongate, fulvus scales; humeri with inner margin depressed, prominent, rounded apically; interval 1 fuscopiceous; intervals broad, flat, punctate, with decumbent narrow elongate fulvus scales, with suberect piceous seta-like scales 2– 3 x length of fulvus scales. Legs: Pro-, and mesofemoral teeth minute; metafemoral tooth large; metafemur not reaching apex of elytra; metafemoral clava very tumid; all femora clothed with narrow, elongate, acute, fulvus scales; tibiae bisinuate, lacking pro-, meso-, and metauncus. Abdomen: Sternum I as long as II behind coxal cavity; II not as long as III; III not as long as IV; sternum V longer than III+IV; sterna clothed with narrow, elongate, fulvus scales. Genitalia: Median lobe moderately slender, distally swollen and sclerotised, behind sinuate, laterally strongly narrowed to swollen basal half, with apodemes long, slightly longer than length of median lobe; tegmen with shorter sclerotic arms lacking notch where the arms attach to the endophallus; aedeagal apodeme longer than arms of tegmen, distal margin of tegmen with 2 long sinuate rather stout sclerotic arms with acute apices, with feather like appendage a apex, arms joined by thick transverse basal sclerotized bar (Fig. 65); lateral view (Fig. 66). Female: 6.3 mm in length; rostrum 3.3 mm in length; scape 1.0 mm in length; antennomeres 1 and 2 subequal. Genitalia: Spermatheca with moderately long ramus; collum broadly enlarged with dorsal pore near ramus; corpus thick leaving cornu broadly tapering to acutely rounded apex 0.3 mm in length (Fig. 67).

Differential diagnosis: This species is smaller than the preceding species. Scales are fulvus rather than white as in M. egeri sp.n. Male genitalia are similar to M. egeri , but in M. guyanensis the median lobe is smaller.

Distribution: French Guiana, Amazon Natural Lodge; Brazil, Para Tucurui.