Helicopsyche (Feropsyche) bendego, 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 : 232-233

Helicopsyche (Feropsyche) bendego , new species

( Figures 1 A–1G)

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Diagnosis. Helicopsyche bendego sp. nov. resembles H. (F.) cipoensis Johanson & Malm 2006 , and H. (F.) muelleri Banks 1920 , all from Brazil. All of these species have large, slightly club-like inferior appendages, with prominent basomesal lobes. However, in H. (F.) muelleri the posterior margin of each inferior appendage has a pointed apical projection, absent in the other two species. Moreover, tergum X has linear rows of setae near the mesodorsal borders in all of these species (segment X is destroyed in the lectotype of H. (F.) muelleri according to Johanson (1998), but these rows of setae are present in the illustrations of H. (F.) angelae ( Marlier 1964) , a junior synonym of the former species). Also, segment X, in dorsal view, is enlarged apically and has a shallow, rectangular mesal cleft in the new species, while in the other species it has almost the same width from its base and is without an apical cleft.

Description. Adult. Overall color (in alcohol) nearly uniformly golden-brown; antennae, palps, and legs yellowish brown (one maxillary palp missing in the holotype). Cephalic setal warts large, oval; postantennal warts tube-shaped. Maxillary palps 2-segmented, proximal and distal segments about equally long, both covered with many dark-brown setae. Tibial spur formula 2,4,4; each foreleg anterior apical tibial spur about 3x longer than posterior apical spur. Male forewings each 4.4–5.0 mm long (n = 10; holotype male = 4.8 mm), covered with fine, short, brown setae. Forewings with forks I, IV, and V present, discoidal and thyridial cells elongate, discoidal cell slightly shorter; hind wings each with forks I and V present, fork I short, anal veins reduced, hamuli present in continuous row along proximal anterior margin, distal anterior margin abruptly concave and without hamuli. Abdomen with sterna III–IV bearing well-developed and darkly pigmented reticulation; abdominal sternum VI ventral process long, about as long as segment VI, tubular along its length, oriented posteroventrad, larger at base, nearly straight in lateral view, covered with microtrichiae, apex rounded, with lamellae apicoventrally ( Figs. 1F, 1G ).

Male genitalia. Segment IX short ventrally; in lateral view with anteromesal margin well-developed, anterodorsal margin almost straight, and anteroventral margin concave; lateral apodeme well-developed, located midlaterally on segment ( Fig. 1A ); in dorsal view with anterior margin strongly concave ( Fig. 1B ); in ventral view with anterior margin convex and posterior margin slightly concave with shallow mesal invagination ( Fig. 1C ). Segment X, in lateral view, triangular, strongly tapering to apex from distal 2/3 ( Fig. 1A ); in dorsal view broad, slightly surpassing apices of inferior appendages, narrower in basal half, apically rounded with rectangular mesal cleft, mesodorsal borders inverted Y-shaped, stem of Y bordered laterally by pair of nearly linear setal rows each with 6–10 long, stout setae ( Fig. 1B ). Superior appendages originating dorsolaterally, setose, rounded in lateral view, clavate in dorsal view ( Figs. 1A, 1B ). Basal plate of inferior appendages triangular in lateral view, not surpassing anteroventral margin of segment IX ( Fig. 1A ), large and trapezoidal in ventral view ( Fig. 1C ); primary branches of inferior appendages large, covered by long, stout setae; in lateral view, each nearly clavate, curved dorsad and widening slightly from base to apex, with distal portion about 1.5x broader than its proximal portion, dorsal margin concave, ventral margin convex near base and slightly concave subapically, apicodorsal margin rounded, slightly undulate, with several long, stout setae along margin ( Fig. 1A ); in dorsal view, 2/3 as wide as base of tergum X, each with inner margin rounded, strongly produced mesad ( Fig. 1B ); in ventral view partially twisted, ventral surface narrowing to apex, apex rounded, internal portion with two basomesal lobes well-developed, ovate, bearing several spine-like setae apically (10–12 setae, only four visible through appendage in lateral view) ( Figs. 1A, 1C ), 1–2 spine-like setae distal of these lobes, each on distinct protuberance ( Fig. 1C ). Phallus tubular, moderately down-curved along its length; phallobase narrow, slightly inflated basodorsally, narrower in middle, apicoventral margin strongly sclerotized, rounded apically; endotheca membranous and partially extending dorsally as lobe over endophallus; phallotremal sclerite not apparent ( Figs. 1D, 1E ).

Holotype male: BRAZIL: Rio de Janeiro: Santa Maria Madalena, Parque Estadual do Desengano, Morumbeca dos Marreiros, Ribeirão Macapá (ponte), 21°52’34.9” S, 41°54’54.9” W, 13.iv.2016, 1045 m, LL Dumas, JL Nessimian, CS Portela & JF Barbosa leg. ( DZRJ).

Paratypes: BRAZIL: Rio de Janeiro: same data as holotype, 1 male, 6 females ( DZRJ) ; same data as holotype, 1 male, 1 female ( MZSP) ; same locality, 21.x.2016, LL Dumas, JL Nessimian & JF Barbosa leg., 3 males, 5 females ( DZRJ) ; same locality, 21-23.x.2016, LL Dumas, JL Nessimian & JF Barbosa leg., 2 males ( DZRJ) ; Santa Maria Madalena, Parque Estadual do Desengano, Morumbeca dos Marreiros , Ribeirão Macapá , 21°52’35.5” S, 41°55’05.4” W, 13.iv.2016, 1039 m, LL Dumas, JL Nessimian, CS Portela & JF Barbosa leg., 1 male, 1 female ( DZRJ) ; Santa Maria Madalena, Parque Estadual do Desengano, Morumbeca dos Marreiros, afluente do Ribeirão Macapá , 21°52’39.0” S, 41°54’55.3” W, 13.iv.2016, 1110 m, LL Dumas, JL Nessimian, CS Portela & JF Barbosa leg., 1 male, 1 female ( DZRJ) ; São Fidélis, Parque Estadual do Desengano, Morumbeca dos Marreiros , Ribeirão Macapá , 21°52’36.1” S, 41°54’43.8” W, 13.iv.2016, 1111 m, LL Dumas, JL Nessimian, CS Portela & JF Barbosa leg., 2 males, 1 female ( DZRJ) ; Campos dos Goytacazes, Mocotó, Parque Estadual do Desengano , Rio Mocotó (próximo a Cachoeira do Maracanã ), 21°48’51.2” S, 41°45’24.3” W, 17.iv. 2016, 243 m, LL Dumas, JL Nessimian, CS Portela & JF Barbosa leg., 1 male ( DZRJ) ; Campos dos Goytacazes, Parque Estadual do Desengano, Itacolomi , afluente do Córrego da Malhada Branca , Poço Parado , 21°49’58.7” S, 41°49’47.4” W, 24.x. 2016, 919 m, LL Dumas, JL Nessimian & JF Barbosa leg., 1 male, 3 females ( DZRJ) ; Itatiaia, Maromba, Rio Preto , Cachoeira do Escorrega , 22°19’49.7” S, 44°36’55.5” W, 26.i.2012, 1381 m, BHL Sampaio & ALH Oliveira leg., 2 males ( DZRJ) .

Distribution. Brazil (Rio de Janeiro).

Etymology. The specific name “bendego” is in reference to the Bendegó Meteorite, the biggest iron meteorite ever found in Brazilian soil, weighting 5,360 kilograms. It was found in Bahia in 1784 and brought to Museu Nacional in 1888, where it had been on display in museum entrance ever since.

Figures

FIGURE 1. Helicopsyche (Feropsyche) bendego, new species. 1A–1E, Male genitalia (holotype): 1A, left lateral; 1B, dorsal; 1C, ventral; 1D, phallus, left lateral; 1E, phallus, ventral. 1F, Abdominal sterna VI and VII, left lateral. 1G, Abdominal sternum VI ventral process, ventral. Scales = 0.5 mm.