Gorhamium bidentatum sp. nov.

Figs 2 A, B, 3 A, 4 A, B, 5 A – D, 6 C – E, H

Type material.

Holotype • male, “ Panama, V. de Chiriqui, 25–4000 ft. Champion ”, secondary labels - B. C. A. Col. III. (2). Calocladon chiriquense, SYNTYPE - blue-edged circle (BMNH). [Volcan de Chiriqui is now referred to as Volcán Barú].

Paratypes • Panama, same data as for holotype, 1 male, 3 females (BMNH); • “ PANAMA, V. de Chiriqui, 2-3000 ft. Champion ”, secondary labels - same data as for holotype , SYNTYPE - blue-edged circle, 1 female (BMNH); • “ Panama, V. de Chiriqui, 4000–6000 ft. Champion, secondary labels - same data as for holotype , SYNTYPE - blue-edged circle, 3 males (BMNH).

Diagnosis.

Pronotum and elytra largely yellow, only median longitudinal stripe on pronotum, basal half of elytral suture, and elytral apex black. Phallus rod-like apically, ventromedial opening oval, widest medially. Parameres shorter than half of phallus, their ventrobasal projects separated (d 1, Fig. 6 C), apex of parameres bidentate, internal sac largely membranous, micro spurs barely visible.

Description.

Body length: 5.1–6 mm, width across the humeri: 1.1–1.2 mm. Body dark brown, only anterior pronotal margin, broad sides of pronotum, trochanters, bases of femora, scutellum, and most of elytra yellow (Fig. 2 A, B). Sutural stripe in basal half of elytra and apical 1 / 30 of elytra black. Head largely covered by pronotum. Elytra 4–4.8 × longer than humeral width (Fig. 2 A). Primary costae 2 and 4 and basal quarter of primary costa 3 more elevated. Reticulate cells irregular, secondary costae 3 and 4 present only basally.

Male. Eyes large, hemispherically prominent, eye diameter 1.5–1.7 × longer than interocular distance. Antennae with antennomere 3 (= A 3) 1.15 × shorter than A 4, A 4 – A 10 subequal in length; antennal branches flattened, lamella of A 3 1.7 × longer than antennomere length, remaining lamellae considerably longer, ~ 2.4 × longer than antennomere length (Fig. 4 B). Abdominal sternum VIII with a broad, shallow emargination distally (up to 1 / 5 of sternum length), its proximal margin minutely emarginated up to 1 / 10 of sternum length (Fig. 5 C). Tergum X small, only 1.3 × longer than preceding sternum IX on the sides (Fig. 5 B). Phallus rod-like in distal 1 / 3, slightly widened apically, with a dorsal hook in median portion (c, Fig. 6 D) and large ventral opening widest medially (b, Fig. 6 C). Parameres moderately shorter than half of phallus, each with two coarse teeth apically, ventrobasal parameral protrusions slender, medially separated by 1 / 3 of phallic width (Fig. 6 C).

Female. Eyes small, eye diameter 1.3 × shorter than interocular distance. Antennae serrate (Fig. 2 B). Terminal sternum with spiculum gastrale rudimentary, triangular to slightly pointed (Fig. 5 D). Ovipositor elongate (Fig. 6 H), valvifers rod-like, 1.4 × longer than coxites, basally coalescent. Coxites medially distant, their base and apex closer, styli as long as half of coxites.

Etymology.

Named after the shape of apical portion of parameres.

Distribution.

Panama.