Two new species of Smicridea (Rhyacophylax) Müller 1879 (Trichoptera Hydropsychidae) from Atlantic Forest, Brazil
Author
Santana, Vitória
0000-0002-0555-9482
Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de Bolsas de Iniciação Científica (PIBIC), Manaus, Amazonas, Brazil. vsantana. bio @ gmail. com; https: // orcid. org / 0000 - 0002 - 0555 - 9482
vsantana.bio@gmail.com
Author
Desiderio, Gleison Robson
Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pós-Graduação (COPOG), Divisão do Curso em Entomologia (DiEnt), Laboratório de Citotaxonomia e Insetos Aquáticos (LACIA), Manaus, Amazonas, Brazil
Author
Hamada, Neusa
0000-0002-3526-5426
Instituto Nacional de Pesquisas da Amazônia (INPA), Coordenação de Pós-Graduação (COPOG), Divisão do Curso em Entomologia (DiEnt), Laboratório de Citotaxonomia e Insetos Aquáticos (LACIA), Manaus, Amazonas, Brazil & neusaha @ gmail. com; https: // orcid. org / 0000 - 0002 - 3526 - 5426
neusaha@gmail.com
text
Zootaxa
2021
2021-03-05
4941
1
115
126
journal article
7799
10.11646/zootaxa.4941.1.7
494f44af-7086-49e3-876e-a84a8bb83381
1175-5326
4594819
90B3063C-0AA3-4E0F-AFB6-5A5C4AFE5C3A
Smicridea
(
Rhyacophylax
)
boraceia
sp. nov.
Santana, Desiderio & Hamada
Figs. 1–3
urn:lsid:zoobank.org:act:
5F866989-8C80-4DCC-86CD-4F982054BA25
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
).
FIGURE 1A–1F.
Smicridea
(
Rhyacophylax
)
boraceia
sp. nov.
, male. 1A, habitus, right lateral (in alcohol). 1B, head, right lateral. 1C, head, dorsal. 1D, right forewing, dorsal. 1E, right hind wing, dorsal. 1F, abdomen, ventral. Scale bars in mm: 1A = 2; 1B, 1C = 0.5; 1D, 1E, 1F = 1.
FIGURE 2A–2F.
Smicridea
(
Rhyacophylax
)
boraceia
sp. nov.
, male genitalia. 2A, left lateral. 2B, dorsal. 2C, apex of tergum X, dorsal. 2D, phallic apparatus, left lateral. 2E, apex of phallic apparatus, left lateral. 2F, apex of phallic apparatus, dorsal. 2G, apex of phallic apparatus, paratype INPA-TRI000100, left lateral. 2H, apex of everted phallic apparatus paratype INPA- TRI000101, left lateral. Scale bar in mm: 2A, 2B = 0.2; 2C–2E = 0.01; 2F = 0.05.
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.