Megaoculis guyanensis Rheinheimer, comb. n.
Creators: name: Pelsue, Frank W.
name: O'Brien, Charles W.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Megaoculis
Megaoculis guyanensis

description: 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.
description: Published as part of 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), pp. 27-49 in Zootaxa 3102 on pages 47-48, DOI: 10.5281/zenodo.203409