Cryptocanthon curticrinis Cook, 2002

Cook, Joyce, 2002, A Revision Of The Neotropical Genus Cryptocanthon Balthasar (Coleoptera: Scarabaeidae: Scarabaeinae), The Coleopterists Bulletin (mo 1) 56, pp. 3-96 : 59-61

23. Cryptocanthon curticrinis Cook sp.nov.

( Figs. 125–129)

Material Examined. Nine specimens (4 males, 5 females).

Type Material. Holotype: ‘‘ ECU[ADOR]: Napo Prov. / Limoncocha , 250 m / 18.VI.1976 / S. & J. Peck / Ber. 348, litter’’ ( CMNC) male . Paratypes (8): same data as holotype ( CMNC) 3 males, 4 females ; ‘‘ ECUADOR: Napo, mid. / Rio Tiputini, Yasuní Res. / Stn. 0840.59S, 768249W / Berlese for. litter. 29 Jun / 1999. CEC#034 C. Carlton ’’ ( BDGC) 1 female .

Etymology. The epithet ‘‘curti-’’ (Latin) ‘‘short,’’ ‘‘-crinis’’ (Latin) ‘‘hair,’’ refers to the short setae of this species.

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; pygidium strongly convex with median longitudinal carina; paramere apices weakly angulate ( Fig. 128).

Description. Holotype. Male. Total length 3.3 mm; greatest width 2.1 mm. Head. Clypeus not strongly produced anteriorly ( Fig. 126). Clypeal teeth moderately well developed, widely separated, moderately reflexed. Clypeal emargination between teeth evenly rounded; vertical surface broadly V-shaped, not foveate. Apical margin of clypeus lateral to teeth slightly convexly arcuate. Disc of clypeus concave, with medium-sized punctures irregularly spaced medially, dense laterally. Clypeogenal suture vaguely indicated by raised area. Gena slightly produced anteriorly, forming an obtuse angle with anterior margin of clypeus. Vertex and gena with medium-sized, irregularly spaced punctures. Pronotum. Convex, explanate laterally, with shallow depressions posterolaterally. Anterior angles approximately right-angled. Sides anterior to lateral angles weakly concave; straight posterior to lateral angles. Posterior angles obtuse, not incised. Pronotum densely punctate; punctures medium-sized anteromedially; larger, shallow, annulate posteriorly and laterally; setae very fine, inconspicuous. Pronotal hypomeron convex, shallowly punctate, not carinate posteriorly. Elytra. Transversely and longitudinally moderately convex; lateral carinae not strongly elevated. Each elytron dorsally with seven striae, each stria indicated by two wavy lines. Elytral intervals slightly convex; each interval with row of minute setose punctures on each side adjacent to striae; setae short, inconspicuous. Inflexed portion of elytron broad, evenly narrowed apically, with minute scattered punctures at base; basal fovea absent; striae eight and nine absent, stria ten indicated by row of punctures adjacent to epipleuron. Epipleuron with row of small shallow punctures along medial margin. Wings. Metathoracic wings well developed. Venter. Prosternum with medium-sized, shallow punctures. Mesosternum with small, scattered punctures medially; laterally, punctures large, shallow, annulate. Meso-metasternal suture evenly rounded medially. Metasternum slightly convex medially, with minute punctures anteriorly, small punctures posteriorly; laterally, punctures large, shallow, annulate.

Legs. Profemur densely punctate ventrally. Protibia ( Fig. 125) slightly widened medially in apical half; weakly notched medially before apex; strongly expanded medially at apex. Mesofemur and metafemur with small, elongate punctures ventrally. Metatrochanter unmodified. Metatibia weakly angulate, not crenulate; lacking subapical lobe.

Abdomen. Apical sternite irregularly, shallowly punctate. Pygidium strongly convex, steeply declivous basally, with median longitudinal carina; base with narrow sulcus. Male genitalia. Parameres ( Figs. 127–128) with apices weakly angulate, not setose.

Variation. Male: total length 3.2–3.4 mm; greatest width 2.1–2.2 mm. Female: total length 3.4–3.8 mm; greatest width 2.1–2.4 mm; clypeal teeth more strongly developed; tibiae unmodified.

Bionomics. This species has been collected from forest litter at 250 m during the month of June.

Geographic Distribution ( Fig. 129). This species is known only from the Amazonian lowlands in the province of Napo, Ecuador.