Cryptocanthon humidus Howden, 1973

Cook, Joyce, 2002, A Revision Of The Neotropical Genus Cryptocanthon Balthasar (Coleoptera: Scarabaeidae: Scarabaeinae), The Coleopterists Bulletin (mo 1) 56, pp. 3-96 : 68-70

27. Cryptocanthon humidus Howden

(Figs. 145–149)

Cryptocanthon humidus Howden 1973:46 ; Howden and Gill 1987:207

Material Examined. Six specimens (3 males, 3 females).

Type Material Examined. Holotype: COLOMBIA ‘‘1200’’, Anchicaya Dam, / 70 km E. Buenaventura, / Valle, Colombia, VII.23 / 1970. H. & A. Howden ’’ ‘‘ J. M. Campbell ’’ ( CMNC) female.

Non-type Material Examined. ‘‘ COLOMBIA: Valle , Alto Anchicaya, 29– 31.VII.1983, B. Gill, 500 m ’’ ( BDGC) 1 male ; ‘‘ Valle , Bajo Calima, 2–5.VIII.1983, B. Gill, 50 m ’’ ( BDGC) 1 female ; ‘‘ PAN[AMA]: Panama , Chepo-Carti Rd., VII 1982, B. Gill, 400 m, FIT’’ ( CMNC) 1 male, ( BDGC) 1 male; same data except ‘‘ VI.1982 ’’ ( BDGC) 1 female .

Diagnosis. This species is distinguished by the following combination of characters: vertical surface of clypeus not foveate; pronotal hypomeron not carinate; inflexed portion of elytron lacking basal fovea; metathoracic wings fully formed; male protibia deeply notched on inner margin (Fig. 145); pygidium strongly convex, with a median longitudinal swelling; paramere apices truncate, conjointly slightly emarginate ( Fig. 148 ).

Description. Male. Total length 3.3–4.3 mm; greatest width 2.1–2.8 mm. Head. Clypeus not strongly produced anteriorly (Fig. 146). Clypeal teeth moderately developed, widely separated, strongly reflexed. Clypeal emargination evenly rounded; vertical surface broadly V-shaped, not foveate. Apical margin of clypeus lateral to teeth slightly convexly arcuate. Disc of clypeus flattened, slightly concave; moderately, irregularly punctate. Clypeogenal suture indicated by obscure raised area. Anterior margin of gena slightly elevated above anterior margin of clypeus. Vertex and gena moderately coarsely, densely punctate. Pronotum. Evenly, moderately convex medially; laterally narrowly explanate, shallow depressions laterally in posterior half. Anterior angles nearly right-angled. Sides anterior to lateral angles nearly straight; slightly convexly rounded posterior to lateral angles. Posterior angles obtuse, very abruptly rounded, not incised. Pronotal punctures medially finer and less dense than on vertex; laterally, punctures similar to those of vertex; setae fine, inconspicuous. Pronotal hypomeron convex with large annulate punctures; not carinate posteriorly. Elytra. Transversely and longitudinally strongly convex; lateral carinae not strongly elevated. Each elytron dorsally with seven striae, each stria indicated by two clearly wavy lines. Elytral intervals flat; each interval with row of minute setose punctures on each side adjacent to striae; setae very fine, inconspicuous. Inflexed portion of elytron broad, evenly narrowed apically, with minute scattered punctures; lacking basal fovea; stria nine present as double wavy line in posterior half, stria ten indicated by row of small punctures adjacent to epipleuron. Epipleuron smooth with row of minute punctures along each margin. Wings. Metathoracic wings well developed. Venter. Prosternum coarsely, densely punctate. Mesosternum with moderately small punctures medially; laterally, punctures are large, shallow and annulate. Meso-metasternal suture roundly angulate medially. Metasternum flat medially with minute scattered punctures; punctures larger posteriorly; laterally punctures are large, shallow, annulate. Legs. Profemur coarsely, densely punctate ventrally. Protibia (Fig. 145) in apical half broadened medially and concave ventrally; deeply notched medially before apex. Mesofemur and metafemur finely punctate ventrally. Metatrochanter unmodified. Metatibia very slightly angulate, not crenulate; small tooth present subapically on inner side. Abdomen. Apical sternite coarsely, densely punctate. Pygidium strongly convex in apical half; convexity with median longitudinal swelling, sharply declivous posteriorly; short sulcus at basal margin; moderately coarsely punctate. Male genitalia. Parameres ( Figs. 147–148 ) with apices truncate, conjointly slightly emarginate, not setose.

Variation. Female. Total length 3.5–4.1 mm; greatest width 2.4–2.5 mm. Clypeal teeth more strongly developed. Legs unmodified.

Bionomics. This species has been collected in flight intercept traps at elevations between 50 m and 500 m. It has been taken during the months of June–August.

Geographic Distribution ( Fig. 149). This species occurs on the Pacific slope of the Cordillera Occidental in Colombia and in the Panamanian province of Panama.

Figures

Figs. 147–148. Cryptocanthon humidus. 145) left protibia, male; 146) clypeal outline; 147) aedeagus, lateral; 148) parameres, dorsal. Scale line 5 0.5 mm.