Callibora Cognato, 2018

Cognato, Anthony I., 2018, Callibora Cognato (Coleoptera: Curculionidae: Scolytinae: Xyleborini), a New Genus of Xyleborine Ambrosia Beetle from Ecuador, The Coleopterists Bulletin 72 (4), pp. 801-804 : 803

Callibora Cognato , new genus

( Figs. 1–5 ) Zoobank.org/ urn:lsid:zoobank.org:act:856D9539-1DB4-451A-999C-DF0B69FCBE1B

Type Species. Callibora sarahsmithae Cognato , new species.

Diagnosis. Callibora resembles the related Dinoxyleborus , and Sampsonius , with the posterior face of the protibia inflated and tuberculate and a flattened antennal club (type 4, Hulcr et al. 2007) with sutures 1 and 2 strongly procurved. Callibora is also similar in appearance to Dryocoetoides , but the latter genus has straight to weakly procurved antennal club sutures (type 3, Hulcr et al. 2007). Callibora can be distinguished from all the above genera by the rounded, tall pronotum (type 4, Hulcr et al. 2007) and the truncate elytral declivity. The truncate elytral declivity is similar in appearance to Amasa species , and the new species may be confused with Amasa truncata Erichson, 1842 , a species recently introduced to South America (Fletchmann and Cognato 2007; Kirkendall 2018). Other Asian species, such as Xylosandrus amputatus (Blandford, 1894) and Xylosandrus mancus (Blandford, 1898) , have truncated declivities, and X. amputatus is adventive in the southeastern USA ( Cognato et al. 2011b). However, the inflated tuberculate protibia distinguishes Callibora from these Asian genera.

Description. As described for the species.

Etymology. F. Kalli (G) = beautiful, bora (G) = gluttonous (traditionally interpreted as “borer” by scolytine taxonomists).

Callibora sarahsmithae Cognato , new species ( Figs. 1–5 ) Zoobank.org/ urn:lsid:zoobank.org:act:643DC564-AADE-48CC-B477-1174A71A7D91

Type Material. Holotype, female, temporarily held in trust at NMNH for MECN. Upper label “ ECUADOR: Napo Prov. Res. Ethnica Waorani, 1 km S. Onkone Gare Camp Trans. Ent. 00 ° 39’ 10” S, 076 ° 26’ W. 220 m elev. January 1994. T. L. Erwin et al. collectors.”; lower label “Insecticidal Fogging. Terre Firme Forest. Trans. 4, Sta. 7. Erwin - lot #586.” Subsequent to the labeling of the specimen, the latitude/longitude coordinates and elevation were revised to 0.6586° S, 76.4453° W, 220–250 m ( T. L. Erwin, in litt.). The type is missing its left antenna.

Diagnosis. As described for the genus.

Description. Female. Length 3.00 mm (pronotum 1.50 mm, elytra 1.50 mm). Width 1.40 mm (pronotum 1.35 mm, elytra 1.40 mm). Body color ferruginous apically and transitioning to dark red-brown posteriorly, with the elytral declivity the darkest. Legs and antennae lighter, ferruginous. Head: Epistoma entire, transverse, lined with row of hair-like setae. Frons slightly convex from epistoma to upper level of eyes; surface shiny, tuberculate; tubercles above epistoma large, coarse, decreasing in size and coarseness from epistoma to upper level of eyes, shallowly aciculate from epistoma to upper level of eyes, punctate dorsad of upper level of eyes; punctures large, deep, widely spaced. Eyes moderately emarginated above level of antennal insertion; upper portion of eyes similar to lower part. Submentum flat, impressed below genae, triangular. Scape narrow, elongate, about length of club. Antennal funicle 4- segmented, antennomeres subequal in size. Pedicel half length of funicle. Club approximately circular, club type 4 ( Hulcr et al. 2007), flattened, round; segments 1 and 2 strongly procurved, corneous, visible on both sides of club, segment 3 not visible. Pronotum: Pronotum rounded, tall (in lateral view) (type 4, Hulcr et al. 2007); 1.1 times as long as wide; anterior margin rounded in dorsal view (type 1, Hulcr et al. 2007), with 6 large serrations anteriorly produced; surface shiny, asperities large, coarse, arranged in approximate rows, decreasing in size and coarseness from anterior margin to midpoint; disc and anterolateral areas finely and evenly punctate; lateral margins rounded; base rounded, transverse. Scutellum: Small, U-shaped, flat, flush with elytra. Elytra: Disc 1.1 times as long as wide. Elytral base transverse; humeral angles rounded. Sides straight from base to apical half of declivity; apex entire. Disc shorter than declivity. Disc smooth, shiny, glabrous; striae moderately punctate; 1–2 rows of interstrial punctures shallow, deeper anteriolaterad; interstriae 5 times width of striae; interstriae parallel. Declivity obliquely truncate, angle to disc approximately 70°. Declivital face imperfectly convex, densely shagreened, dull, striae 1–4 shallowly punctate, curving to apex on apical third, stria 1 impressed. Declivital interstriae shallowly punctured, with minute, dense granules on apical third. Declivital margin granulate-costate from base to midpoint, acutely costate from midpoint to apex. Legs: Procoxae contiguous; prosternal posterocoxal piece short, triangular. Protibia slender, broadest at apical third; posterior face inflated, tuberculate; 7 large denticles present on outer margin of apical half. Meso- and metatibiae flattened, with evenly rounded outer margin; with 7–8 spines; posterior face unarmed.

Distribution. ECUADOR. Potentially restricted to the forest canopy.

Etymology. Named for my wife, Sarah M. Smith, the very talented first American female scolytine taxonomist.

Figures

Figs. 1–5. Callibora sarahsmithae, female holotype. 1) Dorsal habitus; 2) Lateral habitus; 3) Antenna; 4) Frontal habitus; 5) Elytral declivity, posterior oblique view.