Gorhamium bidentatum, Nascimento & Bocakova, 2024

Nascimento, Elynton Alves & Bocakova, Milada, 2024, Phylogenetic analysis reveals a new net-winged beetle genus of Eurrhacini (Coleoptera, Lycidae) from the Pacific slopes of Central America and Ecuador, ZooKeys 1204, pp. 241-259 : 241-259

publication ID	https://doi.org/ 10.3897/zookeys.1204.114932
publication LSID	lsid:zoobank.org:pub:F5134CC6-A83C-48B6-A1EA-235E6858D5CB
DOI	https://doi.org/10.5281/zenodo.11505169
persistent identifier	https://treatment.plazi.org/id/2C643453-BC6F-545E-A4FB-74E4DD6E086A
treatment provided by	ZooKeys by Pensoft
scientific name	Gorhamium bidentatum
status	sp. nov.

Treatment

Gorhamium bidentatum sp. nov.

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

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 View Figure 6 ), 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 View Figure 2 ). 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 View Figure 2 ). 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 View Figure 4 ). 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 View Figure 5 ). Tergum X small, only 1.3 × longer than preceding sternum IX on the sides (Fig. 5 B View Figure 5 ). Phallus rod-like in distal 1 / 3, slightly widened apically, with a dorsal hook in median portion (c, Fig. 6 D View Figure 6 ) and large ventral opening widest medially (b, Fig. 6 C View Figure 6 ). 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 View Figure 6 ).

Female. Eyes small, eye diameter 1.3 × shorter than interocular distance. Antennae serrate (Fig. 2 B View Figure 2 ). Terminal sternum with spiculum gastrale rudimentary, triangular to slightly pointed (Fig. 5 D View Figure 5 ). Ovipositor elongate (Fig. 6 H View Figure 6 ), 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.