Taxonomic study of the genus Oxyethira Eaton 1873 (Trichoptera: Hydroptilidae) from Northeast Brazil: Eleven new species and distributional records
Author
De Souza, Wagner Rafael M.
Author
Santos, Allan Paulo Moreira
text
Zootaxa
2017
4236
3
484
506
journal article
36453
10.11646/zootaxa.4236.3.4
d05219de-97e3-436c-a2c0-00c63b3ce636
1175-5326
322266
C034B77B-BCC0-46FA-9541-12229A053852
Oxyethira
(unplaced)
rafaeli
sp. nov.
Fig. 6A–6
D
Oxyethira
sp. 5
Takiya
et al.
2016
: 172
Description.
Holotype
.
Length: 2.0 mm. General color pale brown (in alcohol). Head without modifications. General pattern of Neotropical
Oxyethira
. Sternum VII with posterior mesoventral process (
Figs. 6A, 6
C).
Male genitalia: Segment VIII annular, covered with setae; sternum VIII with V-shaped posteromesal incision (
Fig. 6A
); tergum with posterior margin produced into two rounded lobes separated by tiny V-shaped notch (
Fig. 6
B). Segment IX retracted in segment VIII, with two pair of dorsal processes: Dorsal pair straight, digitiform, in lateral view slightly curved caudoventrad and reaching posterior margin of segment VIII, ventral pair encircling the first pair laterally, both covered by the lobes of segment VIII in dorsal and lateral views (
Figs. 6
B, 6C); sternum produced anteriorly, reaching into posterior area of segment VII, with anterior margin broadly rounded, almost truncate (
Fig. 6A
); tergum reduced. Inferior appendages short, darkened apically (
Fig. 6A
); in ventral view fused to sternum IX basally, digitiform and diverging apically (
Fig. 6A
); in lateral view subrectangular, with nearly same width throughout (
Fig. 6
C). Subgenital plate conspicuous; in ventral and dorsal views consisting of two wide, membranous lobes (
Figs. 6A, 6
B); in lateral view slightly expanded anteroventrad. Bilobed process with short lobes, each with small apical seta (
Figs. 6A, 6
B). Tergum X membranous. Phallus simple, tubular, without spines or processes, apex angled left about 45°; ejaculatory duct not protruding (
Fig. 6
D).
Remarks.
The new species is similar to
O. spissa
and
O. diplospissa
sp. nov.
in having segment VIII with the posterodorsal margin expanded into two lobes and segment IX bearing dorsal processes.
Oxyethira rafaeli
sp. nov.
can be differentiated from these by the processes of segment IX, which has one long pair almost straight and digitiform, and another encircling that first pair, both being enclosed within segment VIII; and also by the subgenital plate consisting of two membranous apical lobes.
Etymology.
This species is named after the Brazilian entomologist Dr. José Albertino Rafael, who coordinated the project “Pesquisa em Unidades de Conservação do Bioma Caatinga,” which made possible the expeditions to Ubajara (
Ceará
State) and Piracuruca (
Piauí
State).
Material
examined.
Holotype
.
BRAZIL
:
Piauí
:
Piracuruca
,
Parque Nacional de Sete Cidades
,
Riacho Piedade
,
4°06'34''S
,
41°43'39''W
,
169 m
,
19–21.vi.2012
,
DM Takiya, JA
Rafael,
RR Cavichioli
& F. Limeira-de-
Oliveira
cols.,
Malaise
,
1 ♂
(
CZMA
)
.
Paratypes
.
Same
data as
holotype
, except
Poço da Bananeira
,
4°05'56''S
,
41°40'34''W
,
189 m
,
19.iv.2012
,
DM Takiya
,
light trap
,
4 ♂
(
DZRJ
)
.
Same
data as
holotype
, except,
Cachoeira do Riachão
,
4°06'58''S
,
41°40'13''W
,
171 m
,
18.iv.2012
,
DM Takiya
,
light trap
,
3 ♂
(
DZRJ
)
.
Bahia
:
Piatã
,
Fazenda Machado
, riacho
Machado
,
13°11'00”S
,
41°46'00”W
[aproximate coordinate],
30.vi.2010
,
AR Calor
,
light trap
,
4 ♂
(MZUFBA).