3574
Author
Wiedenbrug, Sofia
Author
Lamas, Carlos E.
Author
Trivinho-Strixino, Susana
text
Zootaxa
2012
2012-12-06
3574
1
61
journal article
11755334
Corynoneura canchim
sp. n.
(
Figs 4–6
)
Type material.
Holotype
male,
BRAZIL
, SP,
São Carlos
,
Fazenda Canchim
,
Córrego do Canchim
,
21°54´S
,
47°52´W
, artificial substrate,
iv.2009
,
G. Nunes
.
Paratypes
:
allotype
female with pupal and larval exuviae (
UFSCAR
SW 133
),
São Carlos
, UFSCar,
Córrego do Espraiado
,
21°58.112´S
,
47°52.265´W
,
19.viii.2011
, artificial substrate,
S. Wiedenbrug
; one pharate male with pupal exuviae;
one female
with pupal and larval exuviae same data as allotype;
one male
with pupal and larval exuviae same date as
allotype
but
25.iv.2012
,
L. Rossi
; four pupal exuviae same data as
holotype
but
19.v.2011
,
S. Wiedenbrug
.
FIGURE 4.
Corynoneura canchim
sp. n.
, male.
A
. Terminal flagellomeres.
B–C
. Hypopygium. B. Tergite IX and gonostylus included. C. Tergite IX removed, sclerites hatched; right: ventral view, left: dorsal view.
Diagnostic characters.
The male of
Corynoneura canchim
can be differentiated from other species with phallapodeme attachment placed in the caudal apex of the sternapodeme, phallapodeme sclerotized on posterior margin and apex of hind tibia with a s-shaped seta, by the antenna plumose with 8 flagellomeres, tergite X apparent, superior volsella low without long setae, inferior volsella low and broad, gonostylus curved. The female of
C. canchim
is characterized by the seminal capsules 32–37 µm long, both similarly sclerotized; copulatory bursa semi-circled, orally median invaginated. The pupa has rounded anal lobe, tergites with homogeneous shagreen and sternite
II
with long and colourless spinules. The larva has long antennae with the first segment longer than the postmentum length, mentum with two median teeth and head integument with dorsolateral sclerotized fold.
FIGURE 5.
Corynoneura canchim
sp. n.
, female.
A
. Terminal flagellomeres.
B–D.
Genitalia. B. Dorsal view with view of labia. C. Ventral view. D. Ventral view of labia.
Etymology.
The specific epithet is named after the
type
locality and is treated as a noun in apposition.
Description
Male
(n = 3)
Total length 1.00–
1.32 mm
. Wing length
0.54–0.56 mm
.
Color. Thorax brownish. Abdominal tergites I–IV whitish, other tergites and genitalia brownish. Legs whitish.
Head. AR = 0.70–0.76. Antenna with 8 flagellomeres, apical flagellomere 120–150 µm (
Fig. 4 A
). Flagellomeres with more than one row of seta each. Eyes pubescent.
Thorax. Antepronotal lobes dorsally tapering.
Wing. Clavus/wing length 0.21. Anal lobe absent.
Legs. Hind tibial scale 35–37 µm long, with one small s-seta.
Hypopygium (
Figs 4 B–C
). Tergite X exposed beyond tergite IX. Tergite IX with 4 setae. Laterosternite IX with 1 seta. Superior volsella low without long setae. Inferior volsella broad, low and rounded. Aedeagal lobe small. Transverse sternapodeme rounded. Phallapodeme with posterior margin sclerotized, rounded, attached in the caudal apex of the sternapodeme.
Metric and meristic features in
Table 1
.
Female
(n = 1–2)
Total length
0.95 mm
. Wing length
0.57 mm
.
Color. Thorax brownish. Abdominal tergites I-III whitish, other tergites and genitalia brownish. Legs whitish.
Head. AR = 0.48–0.49. Antenna with 5 flagellomeres, apical flagellomere 50–53 µm long (
Fig. 5 A
). Flagellomeres with more than one row of setae each. Eyes pubescent.
Thorax. Antepronotal lobes dorsally tapering.
FIGURE 6.
Corynoneura canchim
sp. n.
, immatures.
A–C
. Pupa. A. Segments II–IV; left: ventral view, right: dorsal view. B. Tergites VIII, IX and anal lobe; left: ventral view of anal lobe, right: dorsal view of anal lobe. C. Detail of shagreen of sternite II.
D–G
. Larva. D. Head, dorsal view and separated antenna. E. Mentum. F. Abdominal setae. G. Sub-basal seta of posterior parapod.
Wing. Clavus/wing length 0.41. Anal lobe absent.
Legs. Hind tibial scale 30–37 µm long, with one small s-seta.
Genitalia (
Figs 5 B–D
). Tergite IX with 2 setae. Laterosternite IX with 1 seta. Two seminal capsules respectively 32 µm and 37 µm long; one spermathecal duct with a loop, second shorter and straighter, both ducts join together shortly before seminal eminence, which has sclerotized outer borders. Notum 45 µm long. Apodeme lobe well sclerotized, apically pointed. Coxosternapodeme, strongly curved, with one end at roof of copulatory bursa, last semicircle-shaped, orally median invaginated. Labia membranous, bare, funnel shaped, apically building the accessory gonopore(?). Gonocoxapodeme straight, gonapophyses median smoothly pointed. Postgenital plate rounded with few microtrichia. Cercus 20–27 µm long.
Metric and meristic features in
Table 2
.
TABLE 2.
Comparison of metric (in µm) and meristic characters of female of
Corynoneura
.
| Species/ Character |
C. canchim
(n = 1–2)
|
C. diogo
(n = 1)
|
C. espraiado
(n = 2)
|
C. ferelobata
(n = 2)
|
C. humbertoi
(n = 1–2)
|
C. salviniatilis
(n = 1)
|
C. sisbiota
(n = 1–2)
|
| Thorax |
350 |
– |
345 |
350–480 |
340–445 |
– |
340–375 |
| Abdomen |
460–600 |
– |
370 |
– |
860 |
– |
720 |
| AR |
0.48–0.49 |
0.45 |
0.50–0.62 |
0.33–0.39 |
0.51 |
0.37 |
0.30–0.34 |
| Apical flagellomere |
50–52 |
45 |
55–60 |
30–45 |
52–57 |
40 |
30 |
| n Flagellomeres |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
| n Clypeals |
8 |
7 |
8 |
8 |
8–9 |
– |
8 |
| Palpomere 3 |
15 |
12 |
15–17 |
15 |
17–20 |
– |
15 |
| Palpomere 4 |
17 |
20 |
20–22 |
20 |
25 |
22 |
15–17 |
| Palpomere 5 |
40 |
52 |
52–55 |
40 |
47–50 |
40 |
35–42 |
| n Dorsocentrals |
3 |
– |
3 |
4 |
3 |
– |
3–4 |
| n Prealars |
2 |
– |
2 |
2 |
2 |
– |
2 |
| n Scutellars |
2 |
– |
2 |
2 |
2 |
– |
2 |
| Wing |
570 |
505 |
540–560 |
– |
510–620 |
560 |
540 |
| Clavus/Wing |
0.41 |
0.40 |
0.38–0.39 |
– |
0.42 |
0.40 |
0.42 |
| LR1 |
0.48–0.51 |
0.48 |
0.52–0.53 |
– |
0.48–0.53 |
0.45 |
0.44 |
| BV1 |
3.45 |
3.41 |
3.49–3.67 |
– |
3.26–3.28 |
3.41 |
3.67 |
| SV1 |
3.71 |
4.01 |
3.59–3.74 |
– |
3.50–3.68 |
4.12 |
4.16 |
| LR2 |
0.57–0.62 |
0.67 |
0.63–0.69 |
– |
0.66–0.69 |
0.59 |
0.63 |
| BV2 |
4.88–4.92 |
4.31 |
4.75–4.83 |
– |
4.68–4.86 |
4.44 |
4.45 |
| SV2 |
3.60–3.63 |
3.40 |
3.17–3.35 |
– |
3.16–3.20 |
3.57 |
3.45 |
| LR3 |
0.49–0.51 |
0.51 |
0.53–0.54 |
– |
0.49–0.53 |
0.47 |
0.57 |
| BV3 |
4.25–4.36 |
3.98 |
4.00–4.15 |
– |
4.00–4.25 |
3.75 |
4.23 |
| SV3 |
3.88–3.95 |
3.78 |
3.64–3.68 |
– |
3.76–3.96 |
4.16 |
3.65 |
| Ti3 scale length |
30–37 |
35 |
30–45 |
35–37 |
35–37 |
30 |
27 |
| Width of apex of Ti3 |
32 |
22 |
25–30 |
25–32 |
30 |
37 |
27 |
| Sca1, Sca2 |
32–37 |
32, 32 |
57–60 |
37–42 |
52–95 |
30, 30 |
35, 35 |
| Notum |
45 |
20 |
30 |
25 |
27 |
– |
57 |
| Cercus |
20–27 |
25 |
32–35 |
17–22 |
35 |
27 |
17 |
Pupa
(n = 3–4)
Total length
1.21–1.35 mm
.
Color (exuviae). Cephalothorax light brown, abdomen transparent except brownish muscle markings, lateral margin and anal lobe.
Cephalothorax. Frontal apotome rugose. Thorax suture smooth. All Dc-setae thin taeniate. Dc
1
displaced ventrally. Wing sheaths with two rows of pearls.
Abdomen (
Figs 6 A–C
). Tergite I almost bare, tergite II with few small shagreen points, shagreen on tergites III-IX quite homogeneous, on tergite III-VI posterior points slightly larger, on III-V posterolateral points slightly larger than posteromedian. Sternite II with long colourless spinules (
Fig. 6 C
). Other sternites with fine shagreen. Conjunctives SIV/V-SVII/VIII with small spinules. Segment I with 1, II with 3 L-setae and IV-VIII with 4 long taeniate L-setae. Anal lobe rounded (
Fig. 6 B
). Anal lobe with fringe not complete, 3 taeniate macrosetae and inner setae taeniate.
Metric and meristic features in
Table 3
.
Larva
(n = 1–4)
Head. Postmentum 145–162 µm long. Head capsule integument smooth, with dorsolateral sclerotized fold (
Fig. 6 D
). Mentum with two median teeth, first lateral teeth small and adpressed to median, five additional lateral teeth (
Fig. 6 E
). Antenna 404–425 µm long, segments two and three brown (not drawn). First segment longer than postmentum length.
Abdomen. Ventral setae modified, slightly wider than dorsal setae (
Fig. 6 F
). Subbasal seta on posterior parapod serrated at the base and mostly at one margin (
Fig. 6 G
).
Metric and meristic features in
Table 4
.
Remarks.
Larvae of
C. canchim
sp. n.
were collected in artificial substrate of stones and leaves at slow flowing, lowland streams in
São Paulo State
,
Brazil
.