Premnobius neoadjunctus (Schedl), 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 : 77

Premnobius neoadjunctus (Schedl)

Fig. 4 A, B

Xyleborus neoadjunctus Schedl, 1967: 13

Coptoborus neoadjunctus (Schedl) : Wood & Bright 1992: 663.

Gnathotrupes neoadjunctus (Schedl) : Wood 2007: 670.

Premnobius neoadjunctus (Schedl) : Atkinson et al. 2018: 3 .

Similar species. This species most resembles P. flechtmanni in that both have only a single blunt projection on the declivital crest without additional tubercles.

Diagnosis. Length 2.8 mm, 3 as long as wide ( Wood 2007: 670). Frons granulate-punctate. Anterior margin of pronotum subtruncate, unarmed. Pronotum with summit at anterior third, disc shining with moderately deep punctures, separated by 3–4 their diameters, vestiture of short, fine, erect setae, longer laterally. Striae on disc not impressed; interstriae 3 as wide of striae. Uniseriate interstrial setae fine, about as long as width of interstriae, becoming much longer posteriorly near declivital crest. Declivity occupying posterior third of elytra, concave, with an elevated crest from interstria 4 to apex, transition gradual at base. Declivital crest irregularly granulate, with a quadrate, blunt, laterally compressed process about 2/3 distance from base to apex. Strial punctures distinct, uniseriate on face of declivity, large than on disc. Long setae on crest also present in anterolateral areas of face, before quadrate processes.

Note. Atkinson et al. (2018) mistakenly showed the declivity of P. assiduus in Fig. 4D , not the declivity of this species.

Distribution. Known only from two localities in Amazonian and southern Brazil ( Fig. 12D ).

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.