Atlanticolycus itatiaia, 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 itatiaia sp. nov.

( Figs. 4 , 11–12 )

Type material. Holotype, male, BRAZIL: BR, RJ, PN do Itatiaia ; Rio Tapera, próx. ao abrigo 3; 22°27’17,4”S 44°36’26,1”W; 10.iv. 2015, 784m, IT207; L.L. Dumas, J.L. Nessimian col. ( DZUP).

Diagnosis: Eye diameter 1.5× longer than interocular distance. Maxillary palpomere 2 about 2.6× longer than 3. Pronotum 1.25× wider than long, median longitudinal carina in apical 1/3 bifurcating medially forming areola mostly at posterior 2/3, connected to the posterior margin by a very short carina. Elytra dark brown, with a yellow median semicircular spot ( Fig. 4 ). Male genitalia with phallus curved in basal 1/3 and apical 2/3 straight in lateral view, with curved apical double projections dorsally-oriented and apex ventrally bent ( Fig. 11a, b ); parameres straight in ventral view ( Fig. 12 ), with ventral subapical and apical thorns ( Fig. 11c ).

Description: Maxillary palpomeres brown, basal 3/4 of palpomere 2 yellow. Trochanters yellow, basal 1/3 of median femur yellow. Pronotum dark brown with lateral and anterior sides yellow. Elytra dark brown, with a short portion of the humeral region and a median semicircular spot yellowish ( Fig. 4 ).

Eye diameter 1.5× longer than interocular distance. Antennomeres 3−5 almost of the same length. Maxillary palpomere 2 as long as 4, 2.6× longer than 3. Pronotum 1.25× wider than long, median longitudinal carina bifurcating in anterior 1/3 forming areola mostly at posterior 2/3, connected to the posterior margin by a very short carina. Prosternum trapezoidal, mesoventrite trapezoidal. Elytra 3.8× longer than humeral width, intercostal intervals with irregular cells. Hind femora 2.6× longer than trochanter length. Male genitalia with short phallus, curved in basal 1/3 and apical 2/3 straight in lateral view, with curved apical double projections dorsally-oriented and apex ventrally bent ( Figs. 11a, b ); parameres elongate, almost as long as phallus, straight in ventral view, apically rounded with ventral subapical and apical thorns ( Fig. 11c ), joined basally by a ring-like bridge, phallobase asymmetrical and as long as half of parameres length ( Fig. 11–12 ). Body length: 5.9 mm, humeral width: 1.3 mm.

Etymology: The specific name is a noun in apposition taken from the type locality, Itatiaia National Park.

Distribution: Brazil: Southeastern region, Rio de Janeiro state, Itatiaia 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.