Dryotomicus oenophilis, Cognato, Anthony I. & M. Smith, Sarah, 2010

Cognato, Anthony I. & M. Smith, Sarah, 2010, Resurrection of Dryotomicus Wood and description of two new species from the Amazon River Basin (Coleoptera, Curculionidae, Scolytinae, Phloeotribini), ZooKeys 56, pp. 49-64 : 52-55

Dryotomicus oenophilis sp. n. Figs 25

Diagnosis.

Dryotomicus oenophilis is distinguished from the other Dryotomicus species by a large medial tubercle and lateral carina with acute proximal tips on the male frons, interstriae 2 without long uniserial setae, and by raised interstriae of the elytral declivity having tubercles on interstriae 3, 5, and 7 (Fig. 3B).

Description.

Holotype, male, total length 4.5 mm (3.8-4.5 mm, n=7), 2 × longer than wide, color reddish-black (Fig. 2).

Head. Frons shagreen with setae as long as or longer than the large median tubercle, longest setae close to epistoma and frontal margins; a large median tubercle between antennal insertions and dorsal margin of eye; lateral carinae from epistoma to dorsal end of eye thicker at antennal insertion and ending acutely (Fig. 3A). Vertex, shagreen with setae approximately as long as or longer than large median tubercle; slightly concave with distinct slightly carinate lateral margins; obtuse median carina from median frontal tubercle to epistoma. Antennae, scape expanded distally and curved proximally beyond the anterior edge of pronotum, funicle five segmented, segments 1 and 2 about equal length and each as long as the combination of segments 3, 4, 5, club pseudo-lamellate, asymmetric, basal segment 1 expanded at base (j- shaped). Eyes oval, ventrally acute (Fig. 3A).

Pronotal width 2.2 mm (1.7-2.2 mm, n=7), 0.64 × longer than wide; quadrate flat summit not apparent, densely punctured with appressed minute pubescence and scattered longer setae approximately as long as the funicle concentrated anteriorly and laterally.

Elytra 1.2 × longer than wide, 2 × longer than pronotum, striae on disk impressed, punctures only evident near declivity; striae 4-9 marked by shallow, uniserial punctures; interstriae on disk 2 –3× width of striae, confused scales from base to apex on interstriae 1 and 2, interstriae 1 and 3-9 with long uniserial setae approximately as long as the funicle; interstriae 3-9 minutely punctured. (Figs 2, 3B). Elytral declivity with densely placed scales and scattered long setae; striae impressed; interstriae 3, 5, 7 each with 3 tubercles (Fig. 3B).

Male genitalia. Aedeagal body (median lobe) conical, apex acute, lateral margins heavily sclerotized medially on apical half, apophyses (struts) as long as body, attached ventrally; internal sac central area lightly sclerotized, lateral margins heavily sclerotized appearing as ventral apophyses (struts) directed apically, seminal trough at proximal end comprised of two lobes that curve medially (Fig. 4). Tegmen circular, weakly scle rotised on dorsal side. Spiculum gastrale nearly as long as adeagus, crescent-shaped with small knob near the apicalend.

Female similar to male in most features, except frons flat to slightly convex, densely punctured, without median tubercles and carinae (Fig. 5A). Strial punctures on elytra more distinct, interstrial tubercles smaller (Fig. 5B).

Type material.

Holotype and 6 paratypes (3 males and 3 females) bear two collection data labels, First: "Guyana: Iwokrama Forest, GPS N 04,40.486', W 58.41.028', 4-9 March 2007, Cognato, Hulcr, Smith, Dole, McCall Colls"; Second: "Collected with ethanol trap". The holotype is deposited in the Biodiversity Center at the University of Guyana and 4 paratypes are deposited in the A. J. Cook Arthropod Research Collection, Michigan State University, East Lansing; 2 paratypes are in the U.S. National Museum of Natural History, Washington D.C.

Notes.

In Guyana, we collected all specimens from 20 plastic cups filled with 100 ml of 90% ethanol and nailed to trees 1.5 meters above ground.

Etymology.

oeno (G) = wine, philis (G) = lover. The name “wine-lover” signifies the collection of all specimens from ethanol traps.