Smicridea (Rhyacophylax) boraceia Santana & Desiderio & Hamada 2021, sp. nov.
Creators: name: Santana, Vitória
name: Desiderio, Gleison Robson
name: Hamada, Neusa
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydropsychidae
Smicridea
Smicridea boraceia

description: Smicridea (Rhyacophylax) boraceia sp. nov. Santana, Desiderio & Hamada
Figs. 1–3
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Diagnosis. Smicridea (Rhyacophylax) boraceia sp. nov. is most similar to S. (Rhyacophylax) scalprum Vilarino, Dias & Calor 2019 by having tergum X concave at its apex in dorsal view, with lateral margins rounded forming a produced flap, strongly sclerotized, and with the apex of the phallotremal sclerite of the phallic apparatus with subtriangular lateral flap. However, S. (R.) boraceia sp. nov. has six short, stout spines on the ventral region of the apicomesal lobe of tergum X, which are absent in S. (R.) scalprum. In addition, S. (R.) boraceia sp. nov. can be recognized by the two medium-sized, apicolateral spines directed posterad and generally three apicoventral spines directed downward on the phallic apparatus (both absent in S. (R.) scalprum). Additionally, the new species has a pair of subapical, comma-shaped sclerites on the phallotremal sclerite of the phallic apparatus, in dorsal view.
Description. Adult male. Length of each forewing 7.95–8.16 mm (mean = 8.05, SD = ±0.27, n = 5). General color dark brown (in alcohol) (Fig. 1A). Antennae pale brown (Figs 1 A–1C). Head dark brown, dorsal region with: brown setae (Fig. 1C); well-pronounced coronal suture; five setal warts, with anteromesal wart small, rounded, anterolateral pair partially divided, weakly delimited, and posterolateral pair large, ovoid (Fig. 1C). Width of one eye, in dorsal view, 1/3 that of interocular distance (Fig. 1C). Maxillary palp with segment 3 about 2X longer than either of segments 1 or 2 and about same length as segment 4, segment 5 about 1.2X as long as all previous segments combined (Fig. 1B). Thorax dark brown, covered with brown setae (Fig. 1A); legs brown, with fore- and mid-leg tarsi yellowish (Fig. 1A). Wing venation typical for subgenus (Figs 1D, 1E). Forewings, in alcohol, dark brown, with three white transverse bands zigzaging over full length, one subapical band arising on costa, running through half length of R2 and ending at Cu1b; mesal band arising on costa, running through base of R2+3 and ending on apex of Cu2, and basal band arising on subcosta and reaching anal vein (Fig. 1D). Sternum V with pair of anterolateral glandular processes 1.2X longer than sternum. Abdominal segments VI and VII without internal glands (Fig. 1F).
Male genitalia. Segment IX in lateral view with anterolateral margins sinuous, concave at mid-height, weakly sclerotized (Fig. 2A); posterodorsal margins produced, rounded, bearing small spicules (Figs 2A, B). Tergum X elongate; in lateral view, ventrolateral margins strongly sclerotized, without processes; each with apex ending in rounded lobe, with shallow subapicoventral notch, (Fig. 2A); in dorsal view, lateral margins rounded, each produced as flap; dorsomesal setose area bearing seven to eight pairs of medium-sized, fine setae; apex divided mesally into pair of hemitergites by parallel-sided incision about 1/2 length of tergite (Fig. 2B); apex of each hemitergite concave, with one pair of short, stout apicolateral spines, apicomesal lobe strong, rounded, bearing about six short, stout spines ventrally (Figs 2B, 2C). Inferior appendages each 2-segmented; basal segment as long as tergum X, slightly inflated distally, covered with medium-sized to long, fine setae, with four long, stout spine-like setae subapically, two dorsal and two on internal margin; apical segment about 1/2 as long as basal segment, thick, covered with medium-sized, fine setae, curved mesad, apex slightly pointed (Fig. 2B). Phallic apparatus long and tubular; basal section, in lateral view, enlarged, 3X diameter of phallotheca at its narrowest portion, forming angle of about 63° with apical section; median section of phallotheca strongly curved ventrad, without processes (Fig. 2D); apex, in dorsal view, slightly enlarged, without processes or plates; endothecal membranes, in dorsal view, with two medium-sized, dorsolateral spines, directed posterad (Fig. 2F); in lateral view, with three medium-sized, apicoventral spines directed downward (Fig. 2E) (variation: male paratype INPA-TRI 000100 has only two spines (Fig. 2G); male paratype INPA-TRI 000101 also has two spines, one them minute in size (Fig. 2H)); phallotremal sclerite, in dorsal view, distinct, strongly sclerotized, slightly divided distally into two slender, paired lobes with rounded apices, each lobe bearing one small subtriangular lateral, flap (Fig. 2F), accompanied basally with pair of very dark, subapical, comma-shaped sclerites; in lateral view, slender, slightly upturned apically (Fig. 2D). Ejaculatory duct of endophallus, in lateral view, distinct, sclerotized. Endothecal membranes distinctly reticulated (Fig. 2E), dorsolateral spines upturned when phallic apparatus everted (Fig. 2H).
Female and immature stages. Unknown.
Material examined. Holotype male. BRAZIL: São Paulo: Salesópolis, Estaç „o Biológica de Boracéia, Casa Grande, 15.xi.1974, C.G. Froehlich leg., (MZUSP 000351).
Paratypes: same data as holotype, 15 males (MZUSP); same data, except Rio Claro, represa Casa Grande, 23º38’10.3”S, 45º49’57.1”W, 856 m a.s.l., 5 males, 23.i.2011, L.L. Dumas & D.M. Takiya legs., (INPA-TRI 000100–104); same data, except 10 males (DZRJ); same data, except 4 males (DZUP).
Distribution. BRAZIL (Atlantic Forest: S„o Paulo state) (Fig. 3).
Etymology. The specific epithet refers to Estaç„o Biológica de Boracéia where the specimens were collected. The name is a substantive in apposition, with unchanging gender.
description: Published as part of Santana, Vitória, Desiderio, Gleison Robson & Hamada, Neusa, 2021, Two new species of Smicridea (Rhyacophylax) Müller 1879 (Trichoptera Hydropsychidae) from Atlantic Forest, Brazil, pp. 115-126 in Zootaxa 4941 (1) on pages 117-120, DOI: 10.11646/zootaxa.4941.1.7, http://zenodo.org/record/4594819