New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves)
Author
Kolencik, Stanislav
Author
Sychra, Oldrich
Author
Papousek, Ivo
Author
Kuabara, Kamila M. D.
Author
Valim, Michel P.
Author
Literak, Ivan
text
Zootaxa
2018
4418
5
401
431
journal article
30109
10.11646/zootaxa.4418.5.1
fe001114-35af-46d5-bab4-4ab21689cdc6
1175-5326
1244956
04FEA195-71DA-4C7E-A62B-A658CFCF6B0C
Myrsidea pyriglenae
,
new species
(
Figs 14–17
,
27
,
43–44
)
Type
host.
Pyriglena leucoptera
(Vieillot, 1818)
—white-shouldered fire-eye.
Type
locality.
San Rafael National Park
,
Paraguay
(
26°30'S
,
55°47'W
).
Type
material.
Ex
Pyriglena leucoptera
:
holotype
♀
,
San Rafael National Park
,
Paraguay
(
26°30'S
,
55°47'W
),
21 August 2012
,
I. Literak
(
MMBC
)
.
Paratypes
:
6♀
,
7♂
with the same data as holotype (
MMBC
)
.
FIGURES 26–27.
Dorso-ventral views of female thorax and abdomen:
26
,
Myrsidea capeki
n. sp.
; 27
,
Myrsidea pyriglenae
n. sp.
Diagnosis.
Myrsidea pyriglenae
belongs to the
mcleannani
species group (
sensu
Price
et al.
2008b
), based on the shape of the male genital sac sclerite and the deeply serrated female vulvar margin. According to setal counts and measurements, it is morphologically similar to
M
.
milleri
Price, Johnson & Dalgleish, 2008
ex
Gymnopithys rufigula
(Boddaert, 1783)
from
Venezuela
. However, females of
M. pyriglenae
n. sp.
are distinguished from those of
M. milleri
by having (1) modified tergites, especially enlarged tergite II (
Fig. 27
), and (2) larger number of setae on tergite VII (14–16 vs 6–10), tergite VIII (8–9 vs 4), and on anal fringe (83–88 vs 64–74). Males of
M. pyriglenae
differ from those of
M. milleri
by having a larger number of setae on tergites VII (11–15 vs 7–9) and VIII (7–8 vs 4). In addition, the host species of these two species of
Myrsidea
(
Pyriglena leucoptera
and
Gymnopithys rufigula
) have different geographical distributions (
Clements
et al.
2017
) and are not phylogenetically closely related (
Isler
et al.
2013
). Considering genetic data,
M. pyriglenae
is closest to
M. patersoni
Price & Johnson, 2009
(see Remarks below), but these two species clearly differ in such significant characters as (1) female tergites having completely different shapes (compare
Fig. 27
with fig.
3 in
Price & Johnson 2009
), and (2) completely different genital sac sclerite in males (compare
Figs 14–17
with fig.
4 in
Price & Johnson 2009
).
Description. Female (n = 4).
As in
Figs 27
and
43
. Head with lateral sides of preantennal region conspicuously concave. Hypopharyngeal sclerites fully developed. Length of
dhs
10, 0.050–0.064;
dhs
11, 0.100– 0.113; ratio
dhs
10/11, 0.44–0.63;
ls5
0.04–0.05 long, latero-ventral fringe with 9–10 setae. Gula with 4–5 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum not enlarged, with 4–7 marginal setae; metasternal plate with 6–7 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 14–16 setae in ventral setal brush. Tergites modified as on
Fig. 27
, with enlarged tergite II and widely convex posterior margin of tergites II and III. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 5–8; II, 6– 8; III, 11–12; IV–V, 15–18; VI, 15–17; VII, 14–16; VIII, 8–9. Postspiracular setae very long on II, IV, VII and VIII (0.35–0.45); long on I (0.23); and short on III, V and VI (0.11–0.16). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.07–0.09 inserted 0.060–0.075 from base of each very long seta; length of short lateral marginal seta of last segment, 0.03–0.04. Pleural setae: I, 6–8; II, 7–10; III, 7–9; IV, 8; V, 6–7; VI, 6; VII, 4– 5; VIII, 3. Pleurites V–VII with 1–2 somewhat slender and longer setae. Pleurite VIII with inner setae (0.06–0.08) as long as outer (0.05–0.06). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II,
4–6 in
each aster:
s1
, 0.08–0.10;
s2
, 0.08–0.09;
s3
, 0.07–0.08;
s4
, 0.05–0.06;
s5
, 0.04; with 14–16 marginal setae between asters, 4–7 medioanterior; III, 27–30; IV,
3 3–36
; V, 32–39; VI, 28–36; VII, 23–25; VIII–IX, 15–18; and 9–13 setae on deeply serrated vulvar margin; sternites without medioanterior setae. Anal fringe formed by 38–43 dorsal and 42–46 ventral setae. Dimensions: TW, 0.46–0.48; POW, 0.35; HL, 0.28–0.34; PW, 0.29–0.30; MW, 0.44–0.48; AWIV, 0.61–0.66; ANW, 0.21–0.26; TL, 1.55–1.63.
Male (n = 4).
As in
Fig. 44
. Similar to female except as follows: length of
dhs
10, 0.040–0.058;
dhs
11, 0.089– 0.100; ratio
dhs
10/11, 0.45–0.64;
ls5
0.04 long, latero-ventral fringe with 9–10 setae. Gula with 5 (one specimen with 4 on one side) setae on each side. First tibia with 3 outer ventro-lateral and 4–5 dorso-lateral setae. Metanotum not enlarged with 4 marginal setae; metasternal plate with 5–6 setae; metapleurites with 3 short spiniform strong setae. Femur III with 11–13 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 6–8; II, 6–11; III, 14–15; IV, 13–16; V, 15–17; VI, 14–18; VII, 11–15; VIII, 7–8. Postspiracular setae same with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.04–0.06; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 5–6; II, 6–7; III, 7–8; IV, 6–7; V, 5–7; VI, 5–6; VII, 4; VIII, 3. Pleurites IV–VII with 0–3 slender and longer setae. Pleurite VIII with inner setae (0.04–0.05) as long as outer (0.04–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II,
4–5 in
each aster:
s1
, 0.08–0.09;
s2
, 0.07–0.08;
s3
, 0.06;
s4
, 0.05–0.06;
s5
, 0.03; with 12–15 marginal setae between asters, 4–7 medioanterior; III,
1 9–27
; IV, 25–29; V, 26–32; VI, 25–27; VII, 19–22; VIII, 7–11; remainder of plate, 8–11; and with 3–4 setae posteriorly; with 8–9 internal anal setae. Genital sac sclerite as in
Figs 14–17
. Dimensions: TW, 0.41–0.43; POW, 0.31–0.32; HL, 0.27–0.30; PW, 0.26–0.28; MW, 0.35–0.38; AWIV, 0.46–0.47; GW, 0.10–0.11; GSL, 0.08–0.09; TL, 1.25–1.33.
Etymology.
The species epithet is a noun in apposition derived from the generic name of the
type
host.
Remarks.
This is the first record of
Myrsidea
from
Pyriglena leucoptera
.
A portion of COI gene was sequenced from specimens of
M
.
pyriglenae
from
Paraguay
(GenBank
MF563533
). Comparing our sequence with other known sequences of Neotropical
Myrsidea
, the divergences exceeded 18% in all cases, the closest being that of
M
.
patersoni
Price & Johnson, 2009
(ex
Eucometis penicillata
(Spix, 1825)
, family
Thraupidae, GenBank
GQ454448
), with a p-distance of 18.2%. Unfortunately, there are no genetic sequences known from
M. milleri
, the species morphologically closest to
M
.
pyriglenae
. However, considering the combination of morphological differences with
M. patersoni
and
M. milleri
, and the large sequence divergence with
M. patersoni
, we are confident that
M. pyriglenae
is a new, separate species.