Smicridea (Smicridea) ipiranga Desiderio, Pes & Hamada, 2021

Desiderio, Gleison Robson, Pes, Ana Maria, Andrade-Souza, Vanderly & Hamada, Neusa, 2021, The Smicridea (Smicridea) fasciatella species group (Trichoptera: Hydropsychidae) in Brazil: six new species and new distributional records, European Journal of Taxonomy 750 (1), pp. 156-196 : 172-175

publication ID 10.5852/ejt.2021.750.1371

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Smicridea (Smicridea) ipiranga Desiderio, Pes & Hamada

sp. nov.

Smicridea (Smicridea) ipiranga Desiderio, Pes & Hamada sp. nov.

Figs 3 View Fig , 4E View Fig , 9 – 10 View Fig View Fig


This new species can be assigned to the fasciatella complex. Smicridea ipiranga sp. nov. is similar to S. varia (Banks, 1913) , S. lacanha Bueno-Soria & Hamilton, 1986 , and S. catherinae Blahnik, 1995 based on the shape of the apical segment of the inferior appendage, which is slender, strongly curved medially and has a pointed apex. These four species also have a single long, stout apical spine-like seta on the internal margin of the basal segment of the inferior appendage. However, S. ipiranga sp. nov. can be distinguished from its congeners by its diminutive size (on average 3.55 mm); the most similar species in the complex are twice its size on average: S. catherinae (about 6.0 mm), S. lacanha (about 7.9 mm), and S. varia (about 6.15 mm). Additionally, the new species has the phallotremal sclerite with the distal region M-shaped in dorsal view, while in S. catherinae , S. lacanha , and S. varia , this sclerite is Y-shaped.


The specific epithet is a reference to the Ipiranga Stream, located in the Reserva Florestal Adolpho Ducke, where the type specimen was collected. This name is used in apposition.

Material examined

Holotype BRAZIL • ♂; Amazonas , Manaus , Reserva Florestal Adolpho Ducke, Igarapé Ipiranga; 02°58′53.6″ S, 59°54′24.4″ W; 95 m a.s.l.; 30 Jun.–2 Jul. 2015; A.M.O. Pes, G.R. Desiderio, P. Barcelos-Silva and W. Xavier leg.; Pennsylvania trap; INPA-TRI 000112 . GoogleMaps

Paratypes BRAZIL • 2 ♂♂; same locality as for holotype; 9 Aug. 2013; A.M.O. Pes and P. Barcelos-Silva leg.; white sheet with an LED light; INPA-TRI 000113 GoogleMaps 3 ♂♂; same collection data as for holotype; Malaise trap; INPA-TRI 000114 GoogleMaps 5 ♂♂; same collection data as for holotype; Malaise trap; MZUSP GoogleMaps 108 ♂♂; same collection data as for holotype; INPA-TRI 000115 GoogleMaps 1 ♂; Presidente Figueiredo , AM–240, Km 13, Corredeira da Dona Maroca ; 02°02′00.1″ S, 59°51′45.1″ W; 19 Apr. 2008; U.G. Neiss leg.; white sheet with an LED light; DZUP GoogleMaps 6 ♂♂; Presidente Figueiredo , Balneário Sossego da Pantera, Igarapé da Onça; 02°05′57″ S, 60°01′02″ W; 92 m a.s.l.; 23 Aug. 2012; A.M.O. Pes leg.; white sheet with an LED light; DZRJ GoogleMaps .


Adult male ( Figs 9–10 View Fig View Fig )

FOREWING LENGTH. 3.40–3.62 mm (mean = 3.55, SD = 0.07, n = 6).

COLOR. General color dark brown (in alcohol) or black (pinned) ( Fig. 9A View Fig ). Antennae yellowish brown ( Fig. 9A View Fig ). Head dark, with white setae on dorsum ( Fig. 9B–C View Fig ); dorsally with weakly-pronounced median suture; with five setal warts; anteromesal wart small, rounded; anterolateral pair undivided, weakly delimited; posterolateral pair large, ovoid ( Fig. 9C View Fig ). Maxillary palp with segments 1–4 increasing gradually about 0.8× in size toward more apical segments, segment 5 long, about 1.2× as long as all previous segments combined ( Fig. 9B View Fig ). Thorax dark brown, covered with pale brown setae; legs dark brown, with mid-leg tarsi pale yellowish ( Fig. 9A View Fig ). Wing venation typical for subgenus ( Fig. 9D–E View Fig ). Forewings, in alcohol, brown, with white transverse band subapically on pterostigma reaching base of R4+5 and small white spot on apex of Cu2 ( Fig. 9D View Fig ); pinned specimens with 2 transversal bands of white setae, one continuous band in proximal portion reaching from base of subcostal vein to apex of 1A, the other band discontinuous in distal portion reaching from pterostigma to apex of Cu1; apex of wing with fringe of white setae ( Fig. 9A View Fig ). Sternum V with anterolateral glandular processes slightly shorter than sternum. Abdominal segments VI and VII with 2 pairs of internal glands, both pairs longer than their containing segments ( Fig. 9F View Fig ).

MALE GENITALIA ( Fig. 10 View Fig ). Segment IX in lateral view with anterolateral margin straight, strongly sclerotized ( Fig. 10A View Fig ); posterodorsal margin bearing small spicules, distributed in two subquadrate bands ( Fig. 10B View Fig ). Tergum X elongate; in lateral view, ventrolateral margin strongly sclerotized, with small subapical lobe; apex produced and upturned ( Fig. 10A View Fig ); in dorsal view, lateral margin slightly sinuous; dorsomesal setose area bearing five medium-sized, thin setae; divided apicomesally by V-shaped incision about ¼ its length; apex of tergite rounded, with large globose lobe and about eight short, stout setae ( Fig. 10B View Fig ). Inferior appendages 2-segmented; basal segment long, slightly inflated distally, covered with long, thin setae, with one long, stout apical spine-like seta on mesal margin; apical segment short, about ⅓ as long as basal segment, slender, strongly curved medially, apex acute with numerous short, thin setae on mesal margin ( Fig. 10B View Fig ). Phallic apparatus long and tubular; basal section, in lateral view, enlarged, 2× diameter of phallotheca at its narrowest point, forming an angle of about 116° with apical section; median section of phallotheca straight, without processes ( Fig. 10C View Fig ); apex slightly enlarged, without processes or plates; endothecal membranes without spines; phallotremal sclerite, in dorsal view, distinct, strongly sclerotized, proximal region enlarged and narrowing mesally, distal region M-shaped ( Fig. 10D–E View Fig ); in lateral view, aciculate ( Fig. 10C View Fig ). Ejaculatory duct of endophallus, in lateral view, distinct, slightly sclerotized ( Fig. 10C View Fig ). When endothecal membranes are everted, phallotremal sclerite divided into two disconnected parts, one long, apicomesal, rod-like, and the other with a pair of comma-shaped sclerites, distally slightly curved ( Fig. 10F View Fig ).


The males of S. ipiranga sp. nov. were collected near streams in the central Amazon, mainly in a 2 nd order stream (Igarapé Ipiranga) located in the Reserva Florestal Adolpho Ducke, an area of primary Amazon rainforest of about 100 km 2 that is under the protection of the Instituto Nacional de Pesquisas da Amazônia (INPA). The riparian vegetation along this stream is about 2.4 m wide and 0.29 m deep, with a sandy bottom, and a medium-speed water flow ( Fig 4E View Fig ). Its water is clear and acidic (pH 5.1), oxygen solubility levels are high (6.9 mgL), electrical conductivity is low (8.5 µScm-1), and the average temperature is 25.6°C. Specimens of S. ipiranga sp. nov. were also collected in medium-sized streams in the municipality of Presidente Figueiredo (Corredeira da Dona Maroca and Igarapé da Onça), 3.5–12.5 m in width, 0.19–0.44 m deep, with fast-flowing water. These streams were used for recreation (swimming and camping), with rocky bottoms characterized by black and acidic water (pH 4.2–4.8), low electrical conductivity (10.9 µScm-1), and a water temperature of 25ºC.

Distribution ( Fig. 3 View Fig )

Brazil: Amazon (Amazonas).


Brazil, Parana, Curitiba, Universidade Federal do Parana, Museu de Entomologia Pe. Jesus Santiago Moure


Museu de Zoologia da Universidade de Sao Paulo


Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure













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