Scolytodes excavatus 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 : 78-79

Scolytodes excavatus Jordal , sp. nov.

urn:lsid:zoobank.org:act:26C36B3E-E231-4662-9EAC-7D3FB9D76EB0

( Figs 2, 5, 8 )

Type material. Holotype, female: Peru, Huanuco Dept, Cordillera Azul , 37km NE Tingo Maria, 1600m, site673, 11¯ 14jan. 1983, montane rain forest, A. Newton & M. Thayer . Allotype: same data as holotype. Paratype: Peru, Huanuco Dept, Cordillera Azul , 39km NE Tingo Maria, 1700m, site672, 11¯ 14jan. 1983, montane rain forest, A. Newton & M. Thayer. HT, AT and PT 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 short obscure median carina just above epistoma, vestiture in excavated area minute. Similar to S. cavus , but the female frons lacks long dorsal vestiture.

Description female. Length 1.9 mm, 2.2 × longer than wide; colour dark brown. Head. Eyes weakly sinuate, separated above by 2.9 × their width. Frons weakly concave from edge of eyes between vertex and epistoma; surface finely pubescent, with an obscure short longitudinal carina just above epistoma; vestiture consisting of minute pubescence in impressed area, with longer setae close to and on epistoma. 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 0.4 × and mesocoxae 0.8 × the width of one procoxa. Protibiae straight and narrow, distal tooth 1 two times longer than tooth 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.

Male. Similar to female except smaller, 1.7 mm long, lower frons flat and impressed just above epistoma, surface shiny, with few shallow punctures, glabrous; eyes separated by 1.9¯2.0 × 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 excavatus , a masculine nominative participle, meaning excavated, referring to the concave female frons.

Biology and distribution. This species is only known from the type locality in Peru, in medium altitude rain 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).