Phylloicus sallesi, Barcelos-Silva, Patrik, Desidério, Gleison Robson & Pes, Ana Maria, 2017

Barcelos-Silva, Patrik, Desidério, Gleison Robson & Pes, Ana Maria, 2017, A new species of Phylloicus Müller 1880 (Trichoptera: Calamoceratidae) from Espírito Santo State, southeastern Brazil, Zootaxa 4238 (2), pp. 287-292 : 287-288

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Phylloicus sallesi

sp. nov.

Phylloicus sallesi sp. nov. Barcelos-Silva, Desidério, & Pes ( Figs 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Examined material. Holotype male. BRAZIL: Espírito Santo: Fundão, Timbuí , Hotel Fazenda Monte Sião , 19°56’02.0”S, 40°24’45.0”W, ix.2014, P. Barcelos-Silva leg. (alcohol, INPA) GoogleMaps . Paratypes: Same data as holotype, 1 male and 1 female (CZNC).

Diagnosis. Phylloicus sallesi sp. nov. is similar to P. bidigitatus Prather 2003 and P. obliquus Navás 1931 , all three of which have a median hollow in the apex of tergum X and the shape of the apical article of each inferior appendage is elongate, triangular, and with three stout setae at the apex. The new species can be distinguished from those by (1) the presence of ventropleural setae (absent in P. bidigitatus and P. obliquus ), (2) midventral longitudinal ridges of sternum IX that are fused on the midline (widely separated in the other species), and (3) the presence of a distinctive and unique globose expansion of the apicoventral margin of the phallobase. (4) The base of tergum X in dorsal view has a convex prominence (prominence absent in P. bidigitatus ), (5) the lateral arms around the apical notch of tergum X are nearly pointed apically (larger and rounded in P. bidigitatus ), and (6) the inferior appendages of P. sallesi sp. nov. are relatively longer than in P. bidigitatus .

Description. Adult. Forewing length 8.54–8.56 mm (n = 3). General body color orangish yellow, dorsal portion of head with dark brown median longitudinal band covered by dark brown setae; antennae, maxillary and labial palps pale yellow to light brown, covered by dark brown setae ( Fig. 1 View FIGURE 1 A). Antennae twice as long as forewings, brown. Dorsal pterothorax orangish yellow ( Fig. 1 View FIGURE 1 A); ventrolateral thorax pale yellow. Legs golden brown. Metathoracic legs of male each with posterior fringe of long setae. Tibial spur formula 2, 4, 4. Forewings held flat when at rest, chestnut brown and without markings ( Fig. 1 View FIGURE 1 A). Forewing venation similar in male and female except that R1 vein fused with R2 subapically in male ( Fig. 1 View FIGURE 1 B1), but free to apical margin in female; forks I, II, III, IV, and V present, all sessile; discoidal, median, and thyridial cells closed ( Fig. 1 View FIGURE 1 B1). Hind wings each with forks II, III, and V; thyridial cell closed ( Fig. 1 View FIGURE 1 B2).

Male genitalia. Abdominal terga I–VIII without anteromesal notches, corematic structures, or other modifications; sternum VII without posteromesal process. Sternum VIII similar to anterior sterna. Sternum IX not elongate ( Fig. 2 View FIGURE 2 C). Tergum IX without mesal ridge; posterior margin with truncate mesal projection; dorsomesal lobe absent; lateral ridges absent; each side with 12 to 14 dorsopleural setae, two to three ventropleural setae ( Fig. 2 View FIGURE 2 A); sternum IX with pair of parallel midventral longitudinal ridges abutted and fused on the midline ( Fig. 2 View FIGURE 2 C). Preanal appendages digitate, about 3/ 4 as long as tergum X, slightly narrower basally, setae long, but not longer than appendage ( Figs. 2 View FIGURE 2 A, 2B). Tergum X covered with setae; in dorsal view with a convex prominence basally, tapering and notched apically with lateral arms nearly pointed; depth of notch about 1/3 as long as tergum X; basodorsal and basolateral processes absent; base in lateral view, with oblique ventrolateral ridges slightly sclerotized ( Fig. 2 View FIGURE 2 A). Inferior appendages each with basal article enlarged apically, longer than apical article, and covered by long setae; apical article sharply tapered, with five short, stout, midlateral, peg-like setae and three similar subapicomesal setae ( Figs. 2 View FIGURE 2 A, 2C). Phallobase long, curved posteroventrad in middle, with apicoventral portion globose ( Fig. 2 View FIGURE 2 D); phallic endotheca with paired apicolateral lobes upturned, directed laterad and then anterad; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite, in lateral view, triangular, in ventral view horseshoe-shaped ( Figs. 2 View FIGURE 2 D, 2E).

Female genitalia. Sternum VIII with anterior margin concave and slightly angulate, posterior margin with deep notch mesally to anterior ridge, transverse band of setae present on posterior 1/3rd ( Fig. 3 View FIGURE 3 C). Sternum IX with anterior and posterior lobes smooth, distinct, and obliquely striate, with pair of distinct glandular openings between these lobes on each side ( Fig. 3 View FIGURE 3 A). Tergum X lateral appendages triangular, longer than its mesal lobe, margined by long setae, bases indistinct; mesal lobe slightly sclerotized, projecting over shallow notch in middle of posterior margin and with pair of rounded ridges beside it ( Figs. 3 View FIGURE 3 A, 3B). Vaginal apparatus with posterior sclerite elongate, vasiform, ring-shaped structure present anteriorly with pointed projection posteriorly; anterior sclerite broadest at midlength, tapered anteriorly and posteriorly, posterolateral projections absent; ventral lobe triangular and slightly sclerotized ( Fig. 3 View FIGURE 3 A).

Habitat. The specimens described here were collected in a narrow stream with dense vegetation cover in an Atlantic Forest fragment.

Etymology. The specific name honors the great entomologist Frederico Falcão Salles, from CEUNES/ UFES, who strongly improved our knowledge of aquatic insects in Espírito Santo State.

Distribution. Brazil (Espírito Santo).


Instituto Nacional de Pesquisas da Amazonia


Universidade Federal do Espirito Santo