Helicopsyche (Feropsyche) dinoprata, 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 : 236-237

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https://doi.org/ 10.11646/zootaxa.4619.2.2

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scientific name

Helicopsyche (Feropsyche) dinoprata

sp. nov.

Helicopsyche (Feropsyche) dinoprata , new species

( Figures 3 View FIGURE 3 A–3G)


Diagnosis. Helicopsyche (F.) dinoprata sp. nov. is unlike any other species in the subgenus Feropsyche in having broad, elongate inferior appendages pointed apically, each with its basomesal lobe short, forming a small protuberance with a single spine-like seta at its apex. Helicopsyche (F.) piroa Ross 1944 , H. (F.) vergelana Ross 1956 , and H. (F.) tapadas Denning 1966 also have elongate inferior appendages, however they are obtuse apically, and the basomesal lobes are well-developed. Furthermore, the setation of tergum X is also distinctive for the new species.

Description. Adult. Similar to H. (F.) bendego sp. nov. except as follows: Each foreleg anterior apical tibial spur about 2x longer than posterior spur. Male forewing length: 4.4–4.9 mm (n = 10; holotype male = 4.8 mm). Abdominal sternum VI ventral process moderately long, shorter than segment VI, tubular along its length, oriented posteroventrad, nearly straight in lateral view, with microtrichiae along length, apex rounded, with lamellae apicoventrally ( Figs. 3F, 3G View FIGURE 3 ).

Male genitalia. Segment IX short ventrally; in lateral view with anteromesal margin well-developed, anterodorsal margin elongated, slightly sinuous, and anteroventral margin concave; lateral apodeme well-developed, located midlaterally on segment ( Fig. 3A View FIGURE 3 ); in dorsal view saddle-like, with anterior margin strongly concave ( Fig. 3B View FIGURE 3 ); in ventral view with anterior margin straight, anterolateral lobes projecting anterad, posterior margin convex, with mesal portion slightly projected ( Fig. 3C View FIGURE 3 ). Segment X, in lateral view, elongate, with dorsal and ventral margins subparallel, ventral margin abruptly tapering near apex, apex rounded ( Fig. 3A View FIGURE 3 ); in dorsal view not surpassing apices of inferior appendages, mesodorsal borders inverted Y-shaped, bearing 2 medially linear rows of 7–8 stout setae along length and a cluster of 6-8 stout setae apically, apex rounded, with slightly mesal notch ( Fig. 3B View FIGURE 3 ). Superior appendages originate dorsolaterally, setose, rounded in lateral view, nearly club-like in dorsal view ( Figs. 3A, 3B View FIGURE 3 ). Basal plate of inferior appendages finger-like in lateral view, not surpassing anteroventral margin of segment IX ( Fig. 3A View FIGURE 3 ), large and rounded at base in ventral view ( Fig. 3C View FIGURE 3 ); primary branches of inferior appendages each broad, strongly elongate, covered by long, stout setae; in lateral view narrow at base, strongly widening towards midlength, and then tapering apically, apex acute, dorsal margin strongly undulated ( Fig. 3A View FIGURE 3 ); in dorsal and ventral views curved mesad, tapering apically, with apex subacute, turned mesad ( Fig. 3B, 3C View FIGURE 3 ); basomesal lobe of each inferior appendage short, not visible in lateral view; in ventral view, slightly protruding from primary branch, bearing single spine-like seta ( Fig. 3C View FIGURE 3 ). Phallus tubular, strongly down-curved along its length; phallobase narrow, elongate, with apicoventral margin elongate, sclerotized, rounded apically; endotheca membranous lobe partially covering endophallus; phallotremal sclerite small, C-shaped ( Figs. 3D, 3E View FIGURE 3 ).

Holotype male: BRAZIL: Rio de Janeiro: Santa Maria Madalena, Parque Estadual do Desengano, Morumbeca dos Marreiros, afluente do Ribeirão Macapá , 21°52’39.0” S, 41°54’55.3” W, 21.x.2016, 1110 m, LL Dumas, JL Nessimian & JF Barbosa leg. ( DZRJ). GoogleMaps

Paratypes: BRAZIL: Rio de Janeiro: same data as holotype, 1 male, 2 females ( DZRJ) GoogleMaps ; same data as holotype, 1 male, 1 female ( MZSP) GoogleMaps ; Santa Maria Madalena, Parque Estadual do Desengano, Morumbeca dos Marreiros , Trilha da Mina , afluente do Ribeirão Macapá , 21°52’3935.6” S, 41°54’55.0” W, 22.x.2016, 1011 m, LL Dumas, JL Nessimian & JF Barbosa leg., 2 males, 3 females ( DZRJ) ; São Fidélis, Parque Estadual do Desengano, Morumbeca dos Marreiros , afluente do Ribeirão Macapá , 21°52’31.1” S, 41°54’54.1” W, 21.x.2016, 1058 m, LL Dumas, JL Nessimian & JF Barbosa leg., 5 males, 2 females ( DZRJ) GoogleMaps ; Itatiaia, Parque Nacional do Itatiaia, Trilha dos Três Picos , 22°27’19.0” S, 44°36’44.0” W, 01.xii. 2012, 822 m, JR Mermudes leg., 2 males, 2 females ( DZRJ) GoogleMaps ; 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., 1 male ( DZRJ) GoogleMaps ; Mangaratiba, Parque Estadual do Cunhambebe, Sahy , Trilha Sahy-Rubião , 22°53’57.8” S, 43°59’15.4” W, vii–viii. 2016, 400 m, LS Barbosa leg., 9 males, 7 females ( DZRJ) GoogleMaps ; Paraty, Sertão do Taquari, afluente do Rio Taquari , 23°02’30.4” S, 44°41’45.2” W, 18.viii.2012, 50 m, PM Souto leg., 1 male, 1 female ( DZRJ) GoogleMaps ; Cachoeiras de Macacu, Guapiaçu, Reserva Ecológica de Guapiaçu , Rio Manoel Alexandre , 22°25’15.1” S, 42°44’20.2” W, 23.viii. 2018, 135 m, LL Dumas & JL Nessimian leg., 2 males ( DZRJ) GoogleMaps .

Distribution. Brazil (Rio de Janeiro).

Etymology. This species is named for Maxakalissaurus topai Kellner et al. 2006 , an aeolosaurid dinosaur affectionally known as “Dinoprata”. Maxakalissaurus topai is the biggest dinosaur described in Brazil, measuring about 13 meters and nine tons, and lived about 80 million years ago. It was found in the city of Prata, Minas Gerais, Brazil, in 1998. A reconstructed Maxakalisaurus topai skeleton was on display at the Museu Nacional, being one of the main attractions of the public exhibition.


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo


Linnean Society of London


Pratt Museum

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