Scolytodes callosus Jordal & Kirkendall

Jordal, Bjarte H. & Kirkendall, Lawrence R., 2019, Rainforest and cloud forest Scolytodes (Curculionidae, Scolytinae, Hexacolini) from the Arthropods of La Selva inventory in Costa Rica: new species, new synonymy, new records, ZooKeys 863, pp. 1-34 : 1

Scolytodes callosus Jordal & Kirkendall sp. nov. Figs 46, 49, 52

Type material.

Holotype, female: Costa Rica, Prov. Heredia, 16 km SSE La Virgen, 1050-1150 m, 10°16'N, 84°05'W, 19 Feb. 2001, INBio-OET-ALAS transect, #010219-5, ex dead branch of Clusia [L. Kirkendall, leg]. Allotype male: same data as holotype. Paratypes: same data as holotype (2); Heredia, near Virgen de Socorro, 10°14.4'N, 84°07.5'W, 1475 m, 11 Apr. 2005, #050411-1, ex Clusia 8 mm dia. [L. Kirkendall, leg] (4); Prov. Heredia, 16 km SSE La Virgen, 1050-1150 m, 10°16'N, 84°05'W, 21 Mar. 2001, INBio-OET-ALAS transect, 11/TN/16/016 and 11/TN/06/011 (2); Prov. Heredia, 9 km NE Vara Blanca, 1450-1550 m, 10°14'N, 84°06'W, 6 Apr. 2005, INBio-OET-ALAS transect, #050406-3, ex dead branch of Clusia [L. Kirkendall, leg] (1); 17 Apr. 2005, 15/TN/08/024 (1); 20 Mar. 2005, 15/TN/11/016 (1); 20 Feb. 2001, 15/TN/04/002 (1); Prov. Heredia, 10 km SSE La Virgen, 450-550 m, 10°20'N, 84°05'W, 16 Mar. 2003, INBio-OET-ALAS transect, #030316-2 ex Clusia 2 cm dia. [L. Kirkendall, leg] (2); 11 km SSE La Virgen, 250-350 m, 10°21'N, 84°03'W, 11 Apr. 2004, INBio-OET-ALAS transect, #040411-1 [L. Kirkendall, leg] (1). Holotype, allotype and 8 paratypes are deposited in MNCR, 4 paratypes in ZMBN, 4 paratypes in USNM.

Diagnosis.

Interstriae 10 carinate to level of ventrite 1; protibiae with an additional mesal tooth near base of tooth 2. Distinguished from the very similar S. mundus by the impressed lower female frons which has a small median callus just above epistoma, by the sparse, but regular, interstrial punctures, by the more broadly separated pro- and mesocoxae, and by the slightly emarginated eyes which are less broadly separated above.

Description female.

Length 1.2-1.5 mm, 2.4-2.5 × as long as wide; color dark brown. Head. Eyes weakly emarginated along anterior margin, separated above by 2.4-2.6 × their width. Frons weakly impressed on a semi-circular area from just below upper level of eyes to near epistoma, surface strongly reticulate, with dense small punctures; a short median vertically elongated callus just above epistoma. Vestiture consisting of a mixture of fine short setae, and longer semi-erect setae, in impressed area. Antennal club with two recurved sutures on anterior face marked by short setae, on posterior side procurved, forming two oblique rings around the club; funiculus not clearly visible, likely 5-segmented. Pronotum strongly reticulate, with shallow tiny obscure punctures spaced by 3-5 × their diameter; faint asperities present on anterior fifth. Vestiture consisting of 8 erect long setae (4 –2– 2). Elytra generally smooth and shiny, sub-rugose on interstriae 1-3; striae 1 impressed, others not, punctures small, deep, associated with a micro-puncture and together appears like one elongated puncture, each pair separated in rows by less than their length; interstriae 3-4 × as wide as striae, with few small scattered punctures. Interstriae 10 carinate to level of ventrite 1. Vestiture consisting of about 25 erect setae regularly distributed on odd-numbered interstriae. Legs. Procoxae separated by 0.7 × and mesocoxae 1.1 × the width of one procoxa. Protibiae narrow, lateral teeth 1 and 2 of equal size, with 1-2 additional small granules along the lateral edge towards base; an additional mesal tooth present near base of tooth 2; protibial mucro obtuse. Meso- and metatibiae with 7 and 6 small socketed lateral teeth on distal half and third, respectively. Ventral vestiture. Setae on metanepisternum and mesanepisternum bifid, on metasternum and part of metanepisternum simple. Sclerolepidia large, plumose-like scales.

Male.

Similar to female, except frons convex, flattened just above (and level with) epistoma, with fine punctures and scant fine setae.

Key

( Wood 1982). Keys to couplet 25, with no further match.

Etymology.

The Latin name callosus is a masculine adjective, meaning hard, thick skin, referring to an elevated median callus just above the epistoma in females.

Biology and distribution.

This species is known from rainforest localities on the northern slopes of Braulio Carrillo in Costa Rica. Specimens were dissected from thin branches and twigs of Clusia , or collected by flight intercept traps (TN). The majority were collected in cloud forest. Some specimens were from the same twig as the larger species S. catinus .