Dryocoetoides reticulatus Atkinson, 2009

Atkinson, T. H., 2009, A new species of Dryocoetoides Hopkins from southern Florida (Coleoptera: Curculionidae: Scolytinae), Zootaxa 2311 (1), pp. 66-68 : 66-68

Dryocoetoides reticulatus Atkinson n. sp.

Figures 1 –4

Female: Length 2.7 mm; width 1.0 mm, 2.7 times as long as wide; length elytra 1.65 mm, occupying 61% of body length. Color light reddish brown, slightly darker on declivity.

Frons flattened, weakly convex, surface between eyes finely granulate-reticulate, punctures sparse and inconspicuous. Vestiture of sparse, slender setae, longest and most abundant near epistomal margin. Antenna circular: Anterior face with suture 1 straight; 1 st segment 1/3 length of club; suture 2 weakly procurved; anterior face of segments 1 and 2 corneous. Posterior face densely pubescent, not corneous, with sutures 1 and 2 strongly procurved and apically displaced.

Anterior portion of pronotum broadly rounded; central margin armed by 4 low asperities, middle pair largest. Asperities on anterior portion of pronotum small and low. Pronotal summit anterior to middle of pronotum. Disc shining, becoming weakly reticulate on sides. Punctures shallow, spaced by twice their circumference. Vestiture of abundant, short, fine setae.

Striae of elytral disc not impressed, punctures uniseriate. Interstriae slightly wider than striae, surface shining, smooth. Small interstrial punctures confused at base of elytra. Vestiture of erect, slender interstrial setae, confused in basal area, becoming more uniseriate posteriorly, and semirecumbent, short strial setae. Erect interstrial setae similar in appearance and length to those on pronotum, more abundant posteriorly and on declivity.

Declivity steep, abrupt, occupying posterior ¼ of elytra, broadly rounded behind. Declivital striae markedly impressed, interstriae slightly elevated. All interstriae with rows of prominent rows of granules at base, all similar in size and spacing within rows. Entire surface of declivity strongly reticulate-granulate, dull; change from discal surface abrupt. Striae weakly impressed, but punctures not visible. Interstriae 1 not elevated at base, but noticeably elevated and widened near apex with confused punctures. Interstriae 2 impressed, without granules on face of declivity, narrowed posteriorly and not reaching apical margin. Interstriae 3 distinctly elevated, widened on face of declivity with confused granules, curving towards suture near apex, cutting off interstriae 2 as it reaches costal margin. A raised, continuous, serrate costa present from sutural apex reaching interstriae 7, occupying 40% of circumference of declivity.

Male: Not known.

Type Material: The unique female holotype is labeled "FLA: Monroe Co., Big Torch Key, SW ¼, 19-XI-1985 – 26-II-1986, S. & J. Peck, hammock for. malaise FIT". It is deposited in the USNM .

Comments: The species name was chosen because of the strongly reticulate surface of the declivity. It is highly unlikely that this species is restricted to southern Florida. Given that the Caribbean region has been so poorly collected, there is no doubt that it will eventually be found there .

FIGURE 2 (BOTTOM). Dryocoetoides reticulatus lateral view.

FIGURE 4 (RIGHT). Dryocoetoides reticulatus frontal view.

Wood (2007) provided a key for all species of Dryocoetoides . The following modification will accommodate D. reticulatus .

6(1). On elytral declivity all strial and interstrial punctures obsolete. ................................................................................ 6'

- Punctures on declivital striae clearly indicated, in rows............................................................................................... 7

6'(6).All strial and interstrial punctures replaced by tubercles, these tubercles confused, not in rows; declivital surface shining; vestiture moderately short, rather abundant on striae and interstriae; Brazil; 2.7 mm .......inaffectus (Schedl)

- Interstrial tubercles, mostly uniseriate (somewhat confused at base); entire surface of declivity dull, reticulate, in marked contrast to shining surface of elytral disc; vestiture short, sparse on declivity; S. Florida; 2.7 mm ................. ....................................................................................................................................................... reticulatus Atkinson

Figures

FIGURE 1 (TOP). Dryocoetoides reticulatus dorsal view.