Premnobius flechtmanni (Wood), 2018

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 : 76-77

Premnobius flechtmanni (Wood)

Fig. 4 E, F

Acanthotomicus flechtmanni Wood, 2007: 337 .

Premnobius flechtmanni (Wood) : Atkinson et al. 2018: 3 .

Similar species. This species closely resembles P. neoadjunctus . At present very few specimens of either species have been collected. Further collection is needed to determine whether these are distinct species.

Diagnosis. Length 2.0 mm, 3.0 as long as wide ( Wood 2007: 337). Frons reticulate in center, punctate laterally. Anterior margin of pronotum rounded, with 8–10 small teeth along margin. Pronotal summit about 33% of pronotal length. Disc shining, with shallow, widely spaced punctures and very short, erect setae, their length less than distance between punctures. Striae on disc not impressed, interstriae 3 as wide as striae. Interstrial setae uniseriate, their length slightly longer than interstrial width, longer and stouter on odd-numbered interstriae, becoming longer posteriorly. Declivity occupying 33% of elytral length, shallowly concave. Raised, acute declivital crest extending from interstria 4 to apex. A small, acute denticle present on interstria 2 at base of declivity; a larger one on interstria 4, displaced mesally from crest, and a quadrate, blunt, flattened projection near middle of declivity, also displaced mesally from crest. Punctures on declivital face confused, some long setae present on face extending from crest to mid line anterior to quadrate projections.

Distribution. All collection localities are from southern interior Brazil, in forests that are drier than those of the coast and Amazon Basin ( Fig. 12D ).

New Records. Brazil: Mato Grosso, Sorriso, Fazenda Anastácia , 1231′5.43″S 5541′24.15″W, 19-V-2021, ethanol-baited FIT, stand reforested with native trees in Dec2016, with predominance of Parapiptadenia rigida , O.T. Dall’Oglio ( MEFEIS, 1) .

Figures

FIGURE 4. Dorsal and posterolateral views of declivities of Neotropical species of Premnobius, part 1. A,B. P. neoadjunctus (Schedl); C,D. P. perezdelacrucei Petrov & Atkinson; E,F. P. flechtmanni (Wood); G,H. P. assiduus (Schedl). 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.