Cryptocarenus diadematus Eggers

Atkinson, Thomas H., Rabaglia, Robert J. & Cognato, Anthony I., 2010, Two newly detected bark and ambrosia beetles from southern Florida (Coleoptera: Curculionidae, Scolytinae), Zootaxa 2338, pp. 63-68 : 66

Cryptocarenus diadematus Eggers

( Fig. 6 )

Cyrptocarenus diadematus Eggers 1937: 80

Diagnosis. Cryptocarenus consists of 13 Neotropical species (Wood and Bright 1992b). Most are borers of twigs and small-diameter host material and are not host specific. Two other species are known from the U.S., from Florida and southern Texas. C. diadematus is most easily distinguished from the other species known from the U.S. by its larger size and the numerous teeth on anterior margin of pronotum.

Description. Female: Length 2.3 – 3.0 mm; approximately 2.7 times as long as wide. Color yellowish to reddish brown. Frons convex, with a low, longitudinal median elevation above upper level of eyes. Surface coarsely granulate-punctate, becoming longitudinally rugose above eyes. Frontal vestiture sparse. Anterior margin of pronotum with 14–16 teeth, approximately equal in size. Prominent gap immediately behind marginal teeth before numerous anterior rugosities begin and continue to summit. Abundant, erect, hairlike setae interspersed with asperities on anterior area. Pronotal rugosities form a distinct triangular pattern. Posterior and lateral areas of pronotum, smooth, shining. Elytra 1.7 times as long as wide, 1.6 times as long as pronotum. Sides parallel, broadly rounded behind. Elytral surface smooth, shining on disc and declivity. Strial punctures distinct but shallow, interstrial punctures weak or absent. Declivity steep, convex. Vestiture consists of sparse, erect, spatulate interstrial setae. Setae longer and more abundant on declivity, especially on oddnumbered interstriae.

Male: Similar to female in color and proportions, but smaller (1.4 mm long).

Distribution: ( Fig. 9 ). Florida: Palm Beach Co., West Palm Beach, Pine Jog Env. Educ. Ctr., 20–IX– 2003, Lindgren funnel trap baited with ethanol, S. Krantz (2, FSCA). This species is known from lowland Mexico, Central America, Jamaica, Colombia, Venezuela, and Brazil.

The following key is modified from Wood (1982).

Figures

FIGURE 9. Known collection localities for Cryptocarenus diadematus in the Caribbean Basin. Also known from Brazil (Wood and Bright 1992 b).

FIGURES 6 – 8. 6. Cryptocarenus diadematus, female frontal view. 7. Cryptocarenus seriatus, female frontal view. 8. Cryptocarenus heveae, female frontal view.