Scolytodes cavus Jordal, 2018

Jordal, Bjarte H., 2018, Hidden gems in museum cabinets: new species and new distributional records of Scolytodes (Coleoptera: Scolytinae), Zootaxa 4504 (1), pp. 76-104 : 77-78

Scolytodes cavus Jordal , sp. nov.

urn:lsid:zoobank.org:act:03593C14-850C-47C5-8055-832C751AEC3B

( Figs 1, 4, 7 )

Type material. Holotype, female: Peru, Huanuco Dept, N side Cerro Carpish , 2400m, Chinchap site 670, 9¯ 15 Jan. 1983, cloud forest, A. Newton & M. Thayer . Allotype: same data as holotype. HT and AT deposited in FMNH .

Diagnosis. Interstriae 10 sharply elevated to the level of metacoxa, interstriae 9 sharply elevated from level of

metacoxa to near apex; protibiae without additional mesal tooth. Female frons deeply excavated between eyes to epistoma, a weak median carina from epistoma to centre of impressed area, dorsal vestiture of long subplumose setae reaching level of antennal insertion. Similar to S. excavatus , but female frons with much longer dorsal vestiture.

Description female. Length 2.4 mm, 2.2 × longer than wide; colour dark brown. Head. Eyes weakly sinuate, separated above by 3.2 × their width. Frons deeply, sharply, concave from edge of eyes between vertex and epistoma; surface finely pubescent, with a weak carina running from epistoma towards centre of frons; vestiture consisting of few long and golden setae reaching level of antennal insertion. Antennal club densely pubescent, sutures not clearly marked. Funiculus likely 6-segmented. Pronotum weakly reticulate, faint punctures spaced by 2¯4 × their diameter. Vestiture consisting of 8 erect setae (4–2–2). Elytra smooth, striae not impressed, punctures small, shallow, densely placed in irregular rows; interstriae approximately 4 × wider than striae, punctures slightly smaller than those in striae, entirely confused. Vestiture consisting of about 3¯5 erect setae on every odd interstriae.

Legs. Procoxae separated by 0.5 × and mesocoxae 0.8 × the width of one procoxa. Protibiae straight and narrow, distal tooth 1 twice as long as 2, with 2¯3 additional tiny granules along the edge towards base; protibial mucro very short and curved posteriorly. Meso- and metatibiae with 5–6 lateral socketed teeth on distal third. Ventral vestiture. Setae on metasternum and metanepisternum mainly simple, some bifid.

Male. Similar to female except smaller (2.0 mm long), frons convex, slightly impressed just above epistoma, surface weakly reticulated, with few shallow punctures; vestiture consisting of densely placed tiny setae on lower third; eyes separated by 2.1 × their width.

Key ( Wood 2007). The first couplet fails due to the combination of short interstria 10 and no mesal tooth on protibiae.

Etymology. The Latin name cavus , a masculine nominative adjective, meaning concave, refers to the excavated female frons.

Biology and distribution. This species is only known from the type locality in Peru, in high altitude cloud forest.

Figures

FIGURES 1–9. Dorsal, lateral and front view of the female holotype of Scolytodes cavus (1, 4, 7), S. excavatus (2, 5, 8), and S. speculofrons (3, 6, 9).