Atlanticolycus ilhabela, Nascimento & Bocakova, 2023

Nascimento, Elynton Alves Do & Bocakova, Milada, 2023, A new genus of Eurrhacini from the Brazilian Atlantic Forest (Coleoptera: Lycidae: Lycinae) with an updated key to genera, Zootaxa 5383 (2), pp. 242-250 : 247

Atlanticolycus ilhabela sp. nov.

( Figs. 5 , 13–14 )

Type material. Holotype, male, BRAZIL: Ilhabela; ii–[19]53; Rabello col. ( MZSP).

Diagnosis: Eye diameter 1.8× longer than interocular distance. Maxillary palpomere 2 twice longer than 3. Pronotum 1.2× wider than long, median longitudinal carina at apical 1/4 and areola occupying the median 2/4, connected to the posterior margin by a basal carina. Elytra with yellow humeral region and median transversal band increasing in thickness towards marginal costae, with ellipsoidal dark brown spots in basal 1/2 and distal 1/3 ( Fig. 5 ). Phallus curved medially in lateral view, apex slightly ventrally oriented, with sharp and slightly curved apical and subapical projections dorsally-oriented ( Fig. 13a, b ), parameres with ventral subapical thorns ( Fig. 13c ).

Description: Basal 3/4 of maxillary palpomere 2 yellow. Trochanters yellow, basal 1/3 of median femur yellow. Pronotum dark brown with lateral sides yellow and anterior margin light brown. Elytra with yellow humeral region and median transversal band increasing in thickness towards marginal costae, with ellipsoidal dark brown spots in basal half and distal 1/3 ( Fig. 5 ).

Eye diameter 1.8× longer than interocular distance. Antennomeres 3−5 almost of the same length. Maxillary palpomere 2 as long as 4 and twice longer than 3. Pronotum 1.2× wider than long, median longitudinal carina bifurcating in anterior 1/4 forming areola almost occupying basal 3/4, connected directly to the posterior margin ( Fig. 5 ). Scutellum with posterior margin shallowly emarginated. Prosternum trapezoidal, mesoventrite trapezoidal. Elytra 4.3× longer than humeral width, intercostal intervals with irregular cells. Hind femora 3× longer than trochanter length. Male genitalia with short phallus, curved medially in lateral view, with dorsally-oriented apical and subapical projections, apex of phallus slightly ventrally-oriented ( Figs. 13a, b ); parameres elongate, almost as long as phallus, slightly tapering towards the apex ventral view, apically rounded with ventral subapical strong thorns ( Fig. 13c ) and joined basally by a ring-like bridge, phallobase asymmetrical and 2/3 as long as parameres length ( Fig. 13–14 ). Body length: 5.6 mm, humeral width: 1.3 mm.

Etymology: The specific name is a noun in apposition taken from the type locality, Ilhabela municipality.

Distribution: Brazil: Southeastern region, São Paulo state, Ilhabela municipality ( Fig. 19 ).

Figures

FIGURE 19. Geographical distribution of Atlanticolycus species.

FIGURES 1−6. 1. Pronotum of Atlanticolycus camposgerais sp. nov.; 2–6. Habitus: 2. A. camposgerais; 3. A. japi sp. nov.; 4. A. itatiaia sp. nov.; 5. A. ilhabela sp. nov.; 6. A. morretes sp. nov. Scales: Fig. 1: 0.5 mm, Figs. 2–6: 1.0 mm.

FIGURES 7−18. Genitalia: 7–16. Aedeagi lateral and ventral views: 7–8. A. camposgerais sp. nov.; 9–10. A. japi sp. nov.; 11–12. A. itatiaia sp. nov. (stained with Chlorazol Black); 13–14. A. ilhabela sp. nov.; 15–16. A. morretes sp. nov.; 17–18: female genitalia. 17. A. camposgerais; 18. A. japi. Arrows indicate the following structures: a– phallic dorsoapical projections, b– phallus apex, c– parameral thorns. Scale: 0.5 mm.