Helicopsyche (Feropsyche) luziae, Dumas & Nessimian, 2019

Dumas, Leandro Lourenço & Nessimian, Jorge Luiz, 2019, New species of Helicopsyche von Siebold 1856 (Trichoptera: Helicopsychidae) from Brazil, including the redescription of Helicopsyche (Feropsyche) planorboides Machado 1957, Zootaxa 4619 (2), pp. 231-250 : 239

Helicopsyche (Feropsyche) luziae , new species

( Figures 4 A–4G)

urn:lsid:zoobank.org:act:A23278E4-1E62-4CF9-8629-0BD1DAE20496

Diagnosis. The new species closely resembles Helicopsyche (F.) planorboides by the overall shape of tergum X, the racket-like inferior appendages as viewed laterally and the finger-like elongated basomesal lobes. However, H. (F.) luziae sp. nov. can be distinguished from H. (F.) planorboides by the absence of an apicoventral projection on each inferior appendage and by the tab-like basal plate, which is rounded in the second species. Also, the new species can be distinguished by the short midlength projection on tergum X (almost hidden in lateral view), which is robust and spine-like as viewed dorsally but tab-like in lateral view in H. (F.) planorboides .

Description. Adult. Similar to H. (F.) bendego sp. nov. except as follows: Overall color (in alcohol) nearly uniformly dark-brown. Cephalic setal warts large, drop-like; postantennal warts apparently absent. Maxillary palps with proximal and distal segments covered with several light-brown setae. Each foreleg anterior apical tibial spur about 4x longer than posterior spur. Male forewing length: 3.6–4.4 mm (n = 3; holotype male = 4.4 mm). Hind wings each with forks I, III, and V present. Abdominal sternum VI ventral process much shorter than segment VI, slightly wider at base, nearly straight in lateral view, with microtrichiae along length, its apex oblique in lateral view, subtruncate in ventral view, with few lamellae apicoventrally ( Figs. 4F, 4G ).

Male genitalia. Segment IX short ventrally; in lateral view with anteromesal margin well-developed, anterodorsal margin slightly concave, and anteroventral margin almost straight; lateral apodeme well-developed, located midlaterally on segment ( Fig. 4A ); in dorsal view with anterior margin strongly concave, inverted V-shaped, lateral margins sinuous ( Fig. 4B ); in ventral view with anterior margin almost straight, bearing acute anterolateral lobes projected anterad, dorsal margin slightly concave, bearing shallow recess mesally ( Fig. 4C ). Segment X, in lateral view, finger-like, wider at base, with two small projections, one spine-like midlaterally and one tab-like apicolaterally ( Fig. 4A, 4C ); in dorsal view subrectangular, slightly surpassing the apex of inferior appendages, mesodorsal borders straight, parallel, long, forming mesal crest, bearing scattered stout setae subapically and two apical clusters of 8–10 stout setae, small midlateral projections directed anterad, apex with deep mesal V-shaped notch, each apical portion with acute and elevated apex ( Fig. 4B ). Superior appendages originate dorsolaterally, wide, setose, round in lateral view, slightly elongate in dorsal view ( Figs. 4A, 4C ). Basal plate of inferior appendages sickle-like in lateral view, not surpassing anteroventral margin of segment IX ( Fig. 4A ), broad and trapezoidal in ventral view, nearly rounded anteriorly ( Fig. 4C ); primary branches of inferior appendages covered by stout, long setae; in lateral view each racket-like, with distal portion rounded and about 3x as broad as its proximal portion, dorsal margin strongly concave, ventral margin slightly concave and undulating, apicodorsal margin slightly undulating, with long, stout setae along apical margin ( Fig. 4A ); in dorsal view oblong, with inner margin strongly projecting mesad, with many long, stout setae along apical margin, apex rounded, bearing 3–4 long, stout setae ( Fig. 4B ); in ventral view, with three mesal longitudinal ridges, bearing many stout setae, external portion sickle-like, with 4–6 stout setae apically, apex subacute, first subventral mesal longitudinal ridge with 2–3 stout setae sub-basally, middle mesal longitudinal ridge short, forming small protuberance subapically, without setae, subdorsal mesal longitudinal ridge extending from midlength to apex, with 3–4 short, stout setae (two more-apical ones on distinct protuberances), dorsomesal margin with 4–6 stout setae (two more-apical ones on distinct protuberances) ( Fig. 4C ); basomesal lobes of inferior appendages finger-like, very long, strongly protruding beyond primary branches in lateral view ( Fig. 4A ), in ventral view wide at base, with several subapical and many apical short, stout setae ( Fig. 4C ). Phallus tubular, strongly down-curved along its length; phallobase narrow, slightly inflated basodorsally and mesoventrally, with apicoventral margin elongate, semi-membranous apically in lateral view, in ventral view with two sclerotized lobes curved ventroanterad (lobes tab-like in lateral view); endotheca membranous lobe extending dorsally over endophallus; phallotremal sclerite small, slightly C-shaped ( Figs. 4D, 4E ).

Holotype male: BRAZIL: Rio de Janeiro: São Fidélis, Itacolomi, afluente de 1ª ordem do Rio do Colégio , 21°49’49.7” S, 41°51’35.1” W, 23.x. 2016, 421 m, LL Dumas, JL Nessimian & JF Barbosa leg. ( DZRJ).

Paratypes: BRAZIL: Rio de Janeiro: same data as holotype, 1 female ( DZRJ) ; same data as holotype, 1 male ( MZSP) ; Petrópolis, Araras, Ponte Funda , Cachoeira da Ponte Funda , 22°25’38.6” S, 43°16’51.1” W, 18.iii.2018, 1072 m, LL Dumas, JL Nessimian, C Novais & ALD Ferreira leg., 1 male ( DZRJ) .

Distribution. Brazil (Rio de Janeiro).

Etymology. This species is named for Luzia Woman, an upper paleolithic period skeleton that was found in a cave in Brazil in 1975 by the French archaeologist Annette Laming-Emperaire. At about 11,500 years old, she was believed to be the oldest human skeleton found in the Americas. The Luzia skull was on display in the public exhibition of the Museu Nacional.

Figures

FIGURE 4. Helicopsyche (Feropsyche) luziae, new species. 4A–4E, Male genitalia (holotype): 4A, left lateral; 4B, dorsal; 4C, ventral; 4D, phallus, left lateral; 4E, phallus, ventral. 4F, Abdominal sterna VI and VII, left lateral. 4G, Abdominal sternum VI ventral process, ventral. Scales = 0.5 mm.