Premnophilus wilsoni Atkinson & Flechtmann, 2023

Atkinson, Thomas H., Flechtmann, Carlos A. H. & Petrov, Alexander V., 2023, Synopsis of the Neotropical Premnobiina (Coleoptera: Curculonidae: Scolytinae Ipini) with descriptions of new species, new synonymy and keys to species, Zootaxa 5249 (1), pp. 69-91 : 87-88

Premnophilus wilsoni Atkinson & Flechtmann , new species

Fig. 11 A–D urn:lsid:zoobank.org:act:A1FB40E2-9D70-4C25-9C2E-01059964E191

Diagnosis. This species differs from other species in that the declivity is completely flattened with a rounded, circumdeclivital margin. Specimens from Peru differ slightly in the pattern of declivital vestiture.

Female. Total length: 1.31 mm, maximum width: 0.49, length of elytra: 0.69 mm, total length / width: 2.67, elytra length / width: 1.41, pronotal length / width: 1.27 (n=1). Color yellowish brown.

Frons reticulate, with small, shallow punctures, these widely separated and with short, erect setae. A weakly elevated, shining, longitudinal carina runs from well above the eyes to the middle of the frons, not reaching the epistoma. First segment of anterior face of antennal club corneus, bisinuate, middle portion not reaching middle of club; distal part densely pubescent without visible sutures; pubescent area not reaching base of antennal laterally. Posterior face with corneous portion occupying 3/4 club length, pubescent distally, lateral areas not pubescent.

Anterior margin of pronotum rounded, asperities on its leading edge not larger than those on the rest of the anterior slope. Summit slightly anterior to middle, asperities short, with about 3 their thickness, becoming wider and confluent towards summit. Pronotal disc shining, faintly reticulate; punctures shallow, small, widely spaced. Sparse erect setae on disc, spaced by about their length.

Elytral disc shining, smooth. Striae not impressed, punctures shallow, with short recumbent setae. Interstriae about 2 width of striae with mostly uniseriate erect setae, their length slightly longer than the interstrial width. All interstriae becoming granulate at the base of the declivity. Declivity occupying 25% of declivital length in lateral view; steep, with face flattened from the base to the apex. A rounded posterolateral marginal elevation is present in a nearly complete circle from the base to the apex. Margins of interstria 1 raised along suture. The entire declivital face is covered with confused punctures, setae and granules, all of which are uniform in size and distribution. Setae on upper and lateral areas of declivity with longer, stouter setae.

Male. Unknown.

Type Material. Holotype, female, Brazil: Amapá, Tartarugalzinho, Comunidade Entre Rios—Projeto de Assentamento Cedro, Retiro Paraíba, 17′32″ N, 5118′34″ W, 122 m, 11–XII–2014, ethanol-baited FIT, Amazonian terra firme forest fragment, W.R. Silva ( MEFEIS).

Paratypes, females: Brazil: Amazonas, Manaus, 225′ S, 5950′ W, III-1994, Winkler extraction of leaf litter, terra firme forest, R. Didham ( NHMUK, 1) ; French Guiana: Paracou ( Res. Station ?), XI-1996, canopy window trap, P.G. Hammond ( NHMUK, 1) ; Peru: Junin, 15 km NW Satipo, near Rio Venado village , 1111′52.0′′S 7446′12.5′W, elev.~ 1165 m, 18-II-2013, window trap, A.V. Petrov leg ( APP, 2; ZMM, 1).

Distribution. Interior Amazonian and northeastern costal region of South America ( Fig. 12F ).

Etymology. This species is named for Wilson Silva, the collector of this species and in recognition of his collecting efforts in the Amazonian state of Amapá.

Figures

FIGURE 11. Premnophilus wilsoni Atkinson & Flechtmann, female holotype.A. dorsal habitus; B. lateral habitus; C. frons and antenna; D. declivity. All photographs by T.H. Atkinson.

FIGURE 12. Known localities for Neotropical species of Premnobiina. A. Premnobius cavipennis; B. Premnobius ambitiosus; C. Premnobius perezdelacrucei; D. Premnobius species.; E,F. Premnophilus species. Species are grouped only to avoid overlap of collection localities on maps. No ecological or systematic relationships are implied.