Ibyacerina caparao, Henriques-Oliveira & Silva & Nessimian & Takiya, 2021

Henriques-Oliveira, Ana Lucia, Silva, Andre Luís Ramos, Nessimian, Jorge Luiz & Takiya, Daniela Maeda, 2021, New long-horned caddisfly genus and species of Leptoceridae (Insecta: Trichoptera) from Brazil, Zootaxa 5057 (4), pp. 530-544 : 536

Ibyacerina caparao , new species

( Figs. 5–9 )

Adult male. General color (in alcohol) brown; Antennae, palps, and legs golden brown. Forewing length 6.0 mm. Hind wing length 4.7–5.0 mm. Length of body 4.25–4.50 mm (n = 15).

Male genitalia. Segment IX, in lateral view, annular and longitudinally short; with small posterolateral protuberance on each side above inferior appendage and broader posterolateral area below preanal appendage bearing 3 or 4 setae ( Fig. 5 ); in dorsal view, short, sub-quadrangular, posterior margin slightly produced posterad laterally and concave mesally ( Fig. 6 ). Preanal appendages slender, digitate, shorter than tergum X, with scattered short setae and blunt apices; originating from single base together with small mesal process half as long as preanal appendages and with bifid apex ( Fig. 6 ). Tergum X, in dorsal view, broad, subquadrate, heavily sclerotized and wider at truncate posterior margin ( Fig. 6 ); in lateral view dorsoventrally flattened (depressed), saddle-like, slightly wider basally, apex upturned and subtruncate, with small setae at apex ( Fig. 5 ); longitudinal carina on each ventrolateral margin ( Figs 5, 6 ). Inferior appendages each divided into three lobes: basoventral lobe short, rounded, setose; mesal lobe elongate, slightly compressed and broader at base, with apex narrowed before tip and curved slightly lateroventrad; dorsal lobe long, digitate, setose, compressed and wider apically in lateral view ( Fig. 5 ); in ventral view, basoventral lobe wide at base, rounded apically, protruding, and very setose; mesal lobe flat, blade-like, with apex narrowed subapically and blunt apically; dorsal lobe long, digitate and setose subapically ( Fig. 7 ). Phallic apparatus, in lateral view, tubular, curved slightly ventrad; with pair of slender apicolateral processes curved slightly dorsolaterad ( Fig. 8 ); endotheca membranous, with U-shaped phallotremal sclerite ( Figs 8, 9 ).

Female and immature forms: unknown.

Holotype male: BRAZIL: Minas Gerais: Alto Caparaó, Parque Nacional do Caparaó, 1st order tributary of Rio José Pedro , S 20°25’00.50”, W 41°49’19.00”, 2154 m. 19.i.2014, A.P.M. Santos & A.L. R. Silva, leg. ( DZRJ5419 ).

Paratypes: Same data as holotype, 9 males ( DZRJ5420 ) and 3 males ( MZSP) ; same data as holotype, 1 male ( DZRJ5422 , DNA voucher ENT 1812 ) ; same locality as holotype except, 12–14.i.2015, Malaise trap. J.L. Nessimian, A.L.H. Oliveira, S.P. Gomes & C. Portela leg. 1 male ( DZRJ5421 ) .

Etymology: The epithet caparao , a noun in apposition with unchanging gender, refers to the name of the mountain range (Serra do Caparaó) where the type specimens of the new species were collected.

Distribution and biology: Brazil (Minas Gerais state). Specimens of Ibyacerina caparao new species were collected in a hygropetric habitat, near a wall with water splashes of a 1st order tributary of Rio Jose Pedro at 2,154 m a.s.l. in Parque Nacional do Caparaó, on the trail to Pico da Bandeira, the 3rd highest mountain in Brazil. This creek flows over bedrock at a depth of approximately 5–10 cm ( Figs 10A–10C ). Specimens were collected flying during the day.

Figures

FIGURE 10. First order tributary of Rio José Pedro, Parque Nacional do Caparaó, Minas Gerais State, Brazil; type locality of Ibyacerina caparao gen. nov. et sp. nov. 10A, Malaise trap over stream; 10B, view of water running down the wall behind Malaise trap; 10C, downstream view from Malaise trap.

FIGURES 5–9. Ibyacerina caparao gen. nov. et sp. nov., male genitalia. 5, genital capsule, left lateral; 6, genital capsule, dorsal; 7, genital capsule, ventral; 8, phallic apparatus, ventral; 9, phallic apparatus, left lateral.