Chinese species of Pediobius Walker (Hymenoptera: Eulophidae)
Author
Cao, Huan-Xi
Author
Salle, John La
Author
Zhu, Chao-Dong
text
Zootaxa
2017
4240
1
1
71
journal article
36321
10.5281/zenodo.375759
724a3c39-a2cc-44ec-a04c-bca7f2b79ebc
1175-5326
375759
9A463357-EEE2-4A70-BCB2-573052DB48CC
35.
Pediobius yunanensis
Liao, 1987
(
Fig. 32
)
Pediobius yunanensis
Liao,
in
Liao
et al.
1987
: 109
, 112–113; ♀. Lectotype ♀, designated here, IZCAS, examined.
Pediobius songshaominus
Liao,
in
Liao
et al.
1987
: 113
; ♀³. Lectotype ♀, designated here, IZCAS, examined.
Syn. n.
Diagnosis.
Vertex strongly sloping posteriorly, forming an obtuse-angle with occiput (
Fig. 32
a). Occiput not margined. Collar of pronotum not delimited from neck, without anterior carina, elongate and finely reticulate (
Figs 32
a–c). Propodeum with some longitudinal rugae between submedian carinae; the plica produced into a strongly raised crest, which overhangs the posterior spiracular area. The apical tarsomere in all legs swollen, distinctly longer than the three preceding tarsomeres.
Material
examined.
Type
specimens of
P
.
yunanensis
:
Lectotype
♀
,
CHINA
,
Yunnan
,
Kunming
,
07.IX.1965
, coll.
Jing-Liang Qi
(
IZCAS
),
ex
.
Macrocentrus
sp., labeled with "
Pseudacriasoides yunanensis
,
sp. n.
"
;
Paralectotype
1♀
, same data as the
lectotype
.
Type
specimens of
P
.
songshaominus
:
Lectotype
♀
,
CHINA
,
Yunnan
,
Kunming
,
16.IX.1965
, coll.
Jing-Liang Qi
(
IZCAS
),
ex
.
Dioryctria splendidella
Herrich & Schäeffer
, labeled with "
Pseudacriasoides songshaominus
,
sp. n.
"
;
Paralectotype
1♀
, same data as the
lectotype
.
Other
material examined.
CHINA
:
Sichuan
:
3♀
,
Jianyang
, the
Plant Protection Station
of
Jianyang City
,
27.II.1979
;
Yunnan
:
1♀
,
Kunming
,
7.IX.1965
, coll.
Jing-Liang Qi
,
ex.
the pupa of
Dioryctria splendidella
Herrich & Schäeffer
;
2♀
,
Qujing
,
12.VIII.1982
,
ex.
Dioryctria splendidella
Herrich & Schäeffer.
FIGURE 32.
Pediobius yunanensis
Liao, 1987
, female. a–c: body in dorsal view; d: fore wing; e: antenna. Scale bar: 0.5 mm.
Biology.
The
type
specimens of
P. songshaominus
were reared from the pupae of
Dioryctria splendidella
Herrich & Schäeffer
(
Lepidoptera
:
Pyralidae
). The
type
specimens of
P
.
yunanensis
were reared from
Macrocentrus
sp. (
Hymenoptera
:
Braconidae
) that is a parasitoid of
D. splendidella
. In
China
, this species was also recorded as a primary parasitoid from
D. pryeri
Ragonot
(
Lepidoptera
:
Pyralidae
).
Distribution in
China
.
Sichuan
,
Yunnan
.
Remarks.
Although
Liao
et al.
(1987)
used "
P. yunanensis
"
and "
P. songshaominus
" in his book, he wrote them as "
Pseudacriasoides yunanensis
" and "
Ps
.
songshaominus
" on the identification labels. However, we didn't find any specimen labeled with "
Holotype
" for
P
.
yunanensis
and
P
.
songshaominus
. So, we designate a female as the
lectotype
for each of them here. As described by
Liao
et al.
(1987)
,
P
.
yunanensis
is very similar to
P
.
songshaominus
in appearance. They differ from each other only in few characters. Of the differences stated by
Liao
et al.
(1987)
, the first two, the relative length of pronotum to mesoscutum and body colour, are fitted to both and not reliable to separate them; the third one, each protruding postero-lateral corner of pronotum with a foveola at inner side, is found in both the
type
specimens of
P
.
yunanensis
and
P
.
songshaominus
. Besides their different host records (see the biology), we could not find any significant difference to better differentiate them. Thus, we synonymize
P
.
songshaominus
with
P
.
yunanensis
here. The only single male
paratype
of
P
.
songshaominus
has been lost. Based on the original description, male is similar to female, except the following: body more vividly metallic blue-green; scape stout and distinctly compressed and swollen; scutellum nearly smooth in the mid line; gaster truncate ovate, with the following tergites concealed by Gt1.
This species is similar to
P
.
occipitalis
and the American
P
.
strobilicola
Peck. They
seem to be in the same species group. These three species are similar not only in morphology but also in biology, with all three species lacking the occipital carina (
Figs 32
a–c), having the pronotum elongate (
Figs 32
a–c), swollen apical tarsomere that distinctly longer than the preceding tarsomeres (
Figs 32
a–c), and associated with pine shoots.
Peck (1985)
compared
P
.
strobilicola
with
P
.
occipitalis
, where the ratio of length to width of F1 seems to be a reliable character to separate them; while the blunt plica of propodeum seems more reliable to separate
P
.
strobilicola
from
P
.
occipitalis
or
P. yunanensis
.
Pediobius yunanensis
is very similar to
P
.
occipitalis
, which differences between them await further study on the
type
specimens of
P
.
occipitalis
.