Tuyvae guyranhandu Orlandin, Piovesan & Carneiro, 2025

Orlandin, Elton, Piovesan, Mônica & Carneiro, Eduardo, 2025, New species and taxonomic notes on the Apatelodidae (Lepidoptera: Bombycoidea), Zootaxa 5642 (1), pp. 1-15 : 11-13

Tuyvae guyranhandu Orlandin, Piovesan & Carneiro sp. nov. ( Figs 8–9 )

Diagnosis. Tuyvae guyranhandu sp. nov. ( Fig. 8 ) is similar to Tuyvae carabaya Giusti, Herbin & Mielke, 2024 ( Herbin et al. 2024b Fig. 43) and Tuyvae maoma (Schaus, 1920) ( Herbin et al. 2024b Fig. 40), the three species differ from Tuyvae douglasboyesi Giusti, Herbin & Mielke, 2024 ( Herbin et al. 2024b Fig. 39) and Tuyvae orion (Dognin, 1916) ( Herbin et al. 2024b Fig. 236) due to the greyish brown colour and the presence of few dark brown markings on the forewings (in T. orion and T. douglasboyesi the colour is light brown and the forewings have longitudinal dark brown markings in the discal region). The best way to separate the Tuyvae species is by examining the male genitalia. Tuyvae guyranhandu sp. nov. ( Fig. 9A ), T. carabaya ( Herbin et al. 2024b Fig. 44a) and T. maoma ( Herbin et al. 2024b Fig. 41a) show uncus wide with a central projection on the apex and ganthos present (in T. orion ( Herbin et al. 2024b Fig. 37a) and T. douglasboyesi ( Herbin et al. 2024b Fig. 39a) the uncus is narrow and the apex is bifid and ganthos absent). Tuyvae guyranhandu sp. nov. can be differentiated from T. carabaya and T. maoma by the valvae with a well-developed sacculus with several pointed projections ( Fig. 9B ) (in T. carabaya ( Herbin et al. 2024b Fig. 44b) and T. maoma ( Herbin et al. 2024b Fig. 41b) the sacculus is weakly developed with two pointed projections).

Description. Male. Head: vertex and frons brown; compound eyes naked; antenna approximately 1/4 the length of the costal margin of the anterior wing, bipectinate from the base to apex, ventrally naked, dorsally covered by brown scales; labial palpus dorsally covered by brown scales, ventrally covered by a compact block of cream scales; first and second segment thick and slightly curved, the second about twice the length of the first, third segment reduced and oval; proboscis absent. Thorax: dorsally brown, ventrally cream. Legs: all legs smooth, cream (except in the foreleg, on the tibia and tarsomeres, the scales in the anterior region are brown); tibia of middle legs with two pairs of spurs and hind legs with a pair of spurs. Forewing. Length: 14 mm (n=1). Upperside: ground colour brown with a darker brown patch from the inner margin projection to the posterior portion of the discal cell; a very faint dark brown line, on the postdiscal region extending from the costal to the inner margin. Underside: ground colour cream; two faint brown lines, on the posdiscal and submarginal regions extending from the costal to the inner margin; outer margin from apical region to CuA 2 brownish. Hindwing. Upperside: ground colour lighter than the forewing; inner margin, from half to the anal angle, with dark brown scales. Underside: ground colour cream, sprinkled with some dark brown scales; two faint brown lines, on the posdiscal and submarginal regions extending from the costal to the inner margin. Abdomen. Dorsally brown, ventrally cream except the eighth segment, tegumen and valvae covered by longer dark brown scales ( Fig. 8 ). Genitalia. Tegumen shield-like, sclerotized in all its extension. Saccus and saccus arm wide. Uncus dorsoventrally flattened, approximately the same length and width as the tegumen, not ventrally curved; laterals with concavity; apical region rounded with a concavity in the middle, and a projection in the ventral region giving a keel appearance; socii absent. Gnathos, unfused, narrow and posteriorly curved with a sickle aspect. Valvae less sclerotized than uncus and tegumen, rectangular with a rounded apex; sacculus well developed with several pointed projections, reaching half the length of the valvae. Aedeagus slightly sclerotized ventrally and dorsally membranous ( Fig. 9 ).

Female. Unknown.

Type material. Holotype. BRAZIL. 1 ♂; Parque Nacional da Amazônia , Itaituba, Pará, deposited at the DZUP, with the following labels: / BRASIL, PARÁ, ITAITUBA, Pq NAC. AMAZÔNIA, BASE TRACOÁ, 4°28'13"S 56°17'03"W, 29, 30-VII-2022, CARNEIRO, ORLANDIN, CASAGRANDE & MIELKE LEG./ DZ 53.106 / GEN. PREP. E. ORLANDIN 2024 / [red label] Holotype Tuyvae guyranhandu Orlandin, Piovesan & Carneiro det. 2025/. Genitalia in vial glass with glycerine with the following label: / DZ 53.106 Tuyvae guyranhandu Orlandin, Piovesan & Carneiro 2025 / CCDB code CMBUT1904-23 . —no paratypes.

Geographic distribution. This species is known only from the type locality, in the Lower Tapajos Valley.

Etymology. The name is the combination of Guyra and Nhandu, greater rhea in Tupi. Guyra Nhandu is the name of the constellation that, in the second half of June, fully appears at dusk, on the east side, indicating the beginning of the dry season for the indigenous peoples of northern Brazil. This constellation was observed during the nights when we collected specimens of this new species.

Remarks. Tuyvae guyranhandu sp. nov. is very similar to T. maoma and T. carabaya its correct identification is only possible by observing the genitalia. DNA barcoding confirms the close relationship between T. guyranhandu sp. nov. and T. maoma ( Table 2 ).

Figures

FIGURE 8. Tuyvae guyranhandu sp. nov. A) dorsal view; B) ventral view.

FIGURE 9. Tuyvae guyranhandu sp. nov. male genitalia. A) ventral view; B) lateral view.