Hypothenemus concavodeclivis Atkinson and Flechtmann, 2021

Atkinson, Thomas H. & Flechtmann, Carlos A. H., 2021, New species, new records and synonymy of Brazilian species of Hypothenemus Westwood, 1834 (Coleoptera: Curculionidae: Scolytinae), Insecta Mundi 2021 (846), pp. 1-33 : 19

Hypothenemus concavodeclivis Atkinson and Flechtmann , new species

Fig. 11

Diagnosis. This small species would key out to couplet 37 in Wood’s 2007 key. Beyond this point it does not resemble any of the other species included in the key. Unique features include the fine, hair-like setae that are very long on the declivity, the robust body form, and the weakly sulcate declivity.

Female. total length: 1.25 mm, maximum width: 0.60 mm, length of elytra: 0.8 mm, total length / width: 2.03, elytra length / total length: 0.64, pronotal length / width: 0.71.

Frons flattened, central area between eyes with sparse granules and sparse hair-like setae. A shallow, longitudinal impression extends from epistoma to upper level of eyes. Antennal flagellum with three segments (plus pedicel); club oval, with clearly marked sutures.

Pronotum with six evenly spaced asperities on anterior margin, central pair larger than others. Anterior slope with numerous small asperities (>25), surface smooth, shining, with fine hair-like setae mixed with asperities. Summit not produced, at or near middle of pronotum. Disc shallowly punctured, surface finely reticulate between punctures, vestiture of fine, hair-like setae.

Surface of pronotal disc smooth, shining. Striae not impressed, punctures shallow, with short, recumbent hair-like setae. Interstriae smooth, flattened, 3–4× as wide as striae, vestiture of uniseriate, fine, hair-like setae, their length about the same as width of interstriae.

Declivity occupying slightly more than ½ the total elytral length, its surface flattened, slightly concave between the third interstriae. Interstriae with long, erect, hair-like setae, at least twice as long as those on disc as well as confused, recumbent hair-like setae forming the ground vestiture. Longer, erect setae associated with fine granules. Striae also with recumbent setae, longer than those on disc. Strial punctures obscure on declivity, overall declivital surface reticulate.

Male. Unknown.

Type material. Holotype female: Peru: Loreto: Requena, Genaro Herrera , terra firme forest, 4°52′44.22″S 73°38′52.42″W, unbaited window trap, 05-VIII-2011, G. Lamarre ( MEFEIS).

Etymology. The species name refers to the unusual concave declivity in this species.

Figures

Figure 11. Hypothenemus concavodeclivis new species, female holotype. A) Dorsal view. B) Lateral view. C) Frontal view. D) Posterolateral view. Photos by T.H. Atkinson.