Helicopsyche (Feropsyche) krenak, Neto & Vilarino & Salles, 2023

Neto, Pedro Bonfá, Vilarino, Albane & Salles, Frederico F., 2023, Brevitentoria Weaver 1984 (Trichoptera: Integripalpia) of Espírito Santo State, Brazil: New records and new species, Zootaxa 5336 (3), pp. 301-327 : 312-315

Helicopsyche (Feropsyche) krenak sp. nov.

( Figs 6A–6C , 7A–7H )

urn:lsid:zoobank.org:act:E592C148-48AF-42B3-9A1C-8DD5C402DC0A

Holotype male. Brazil, Espírito Santo, Santa Teresa, Reserva Biológica Augusto Ruschi, Bragacho stream (P13), 19°52’2.53”S 40°33’34.27”W, 830m, 30.ix–21.x.2017, Malaise, CEUNES col. ( UFVB: TR00085 ).

Paratypes. Same data as holotype (1♁, UFVB: TR00086 ); same, except 19.xii.2017 – 17.i.2018 (1♁, UFVB: TR00087 ) .

Additional material examined. P16: 20–21.iii.2018 (1♁).

Diagnosis. This species is similar to Helicopsyche petri Dumas & Nessimian 2019 , H. johansoni Moreno et al. 2023 , and H. lambda Flint 1983 by all these species having an inferior appendage with a long and narrow apical process and a well-developed basomesal lobe. The new species is also similar to H. monda Flint 1983 but this species has a basomesal lobe barely noticeable laterally. The new species differs from H. petri mainly by the protruding basomesal lobe surpassing the primary branch of an inferior appendage in lateral view and by the longer segment X (longer than segment IX). It can be differentiated from H. johansoni mainly by the inferior appendage having a shorter basal plate (not surpassing segment IX), wider basomesal lobe, and shorter apical process (1/2 as long as in H. johansoni ). The new species is differentiated from H. lambda mainly by the pointed basomesal lobe in H. lambda , which is apically round in the new species, and the longer segment X and shorter basal plate in the new species.

Description. Adult male: Forewing 4.2 mm (holotype). Body color overall pale brown, wings translucent, pale brown (in alcohol) ( Fig. 6A ). Head: postantennal setal wart club-shaped, cephalic setal wart large, round, occupying half of vertex, coronal suture well defined ( Fig. 6C ). Maxillary palp typical of genus. Antenna long, scape wide. Thorax: Pronotum very narrow, with transversely elongate setal wart. Mesonotum wide, with mesoscutal setal wart pale, ovoid, and diffuse; mesoscutellum anterior margin round, posterior margin substraight, with diffuse setal wart ( Fig. 6B ). Legs yellowish pale. Tibial spur formula 2-2-4. Forewing forks I, II, III and V present; hind wing forks I and V present ( Fig. 7A ). Abdomen: Sternum VI ventral process long, about as long as segment VI, tubular throughout its length, oriented posteroventrad, slightly wider at base, curved slightly upward in lateral view, with microtrichiae along length, apex round, with lamella apicoventrally ( Figs 7G, 7H ).

Genitalia ( Figs 7B–7F ): Segment IX, in lateral view ( Fig. 7B ), with prominent anterior lobe near mid-height, anterodorsal margin substraight, anteroventral margin concave, with dorsal, lateral and transversal sutures; in dorsal view ( Fig. 7C ), with anterior margin shallowly concave, dorsal suture weakly sclerotized, reaching apex of segment X; in ventral view ( Fig. 7D ), posterior margin with small mesal process, transverse sutures well developed. Segment X, in lateral view ( Fig. 7B ), narrowing along its length, subrectangular; in dorsal view ( Fig. 7C ), with parallel lateral margins, apex with wide notch; each resulting apical lobe with 6–7 subapical setae, and about 2 dorsolateral setae. Preanal appendage ( Figs 7B, 7C ) club-shaped, projecting posterolaterad. Inferior appendage with primary branch, basomesal lobe and basal plate. Primary branch, in lateral view ( Fig. 7B ) wide, hatchet-shaped, distal portion about 2x as wide as proximal portion; dorsal margin concave, apicodorsally produced into rounded lobe, apical margin slightly concave, posteroventral margin substraight with ventrobasal region concave; in dorsal view, inner margin subapically produced mesad, semicircular; apex slender, digitiform, curved mesad. Basomesal lobe, in lateral view ( Fig. 7B ), with apex round, protruding beyond primary branch, with 9 or 10 spine-like setae; in ventral view ( Fig. 7D ), produced into apically rounded lobes, with mega setae over mesal and posterior margins, mesal margin straight. Basal plate, in lateral view ( Fig. 7B ), short, substraight, not surpassing segment IX; in ventral view ( Fig. 7D ) triangular, acute anteriorly. Phallus, in lateral view ( Figs 7E, 7F ), curving slightly ventrad; anterior 1/4 nearly 2x as wide as central part ( Fig. 7E ); in ventral view ( Fig. 7F ), anterior 1/4 nearly 2x as wide as central part, slightly wider toward posterior half; endotheca conspicuous ( Figs 7E, 7F ); sperm channel visible anteriorly; phallotremal sclerite in lateral view small, horseshoe-shaped ( Fig. 7E ).

Etymology. The specific epithet “krenak” is the name of the indigenous people who inhabited the south of Bahia State and north of Espírito Santo and Minas Gerais States. They are also known as Botocudos and Aymorés. The name is used here as a noun in apposition with unvarying gender.

Distribution. Brazil (Espírito Santo).

Figures

FIGURE 6. Helicopsyche krenak sp. nov., adult male. 6A, habitus, left lateral; 6B, head and thorax, dorsal; 6C, head, dorsal. Abbreviations: ce.w. = cephalic setal wart; me.w. = mesoscutal setal wart; pa.w. = postantennal setal wart; po.w. = postocular setal wart; pr.w. = pronotal setal wart. Scale bar: A = 0.5 mm; B = 0.2 mm; C = 0.1 mm.

FIGURE 7. Helicopsyche krenak sp. nov., adult male. 7A, right fore- and hind wing venation, dorsal. 7B–7F, genitalia: 7B, left lateral; 7C, dorsal; 7D, ventral; 7E, phallus, left lateral; 7F, phallus, ventral. 7G–7H, sternum VI ventral process: 7G, left lateral; 7H, ventral.