Gomphidae of Guangdong & Hong Kong, China (Odonata: Anisoptera) 2177
Author
Wilson, Keith Duncan Peter
Author
Xu, Zaifu
text
Zootaxa
2009
2009-08-06
2177
1
62
journal article
11755334
Leptogomphus hongkongensis
Asahina 1988
stat. nov.
Figs. 5
(a–m)
Leptogomphus perforatus
subsp. (?) nec
Ris 1912
:
Asahina (1965: 500
, figs 16–17,
Hong Kong
: Lam Tsuen Valley & Tai Po Kau).
Leptogomphus sauteri
? nec
Ris 1912
:
Lai (1971: 120
, 144 fig. 19,
Hong Kong
: Fo Tan & Tai Po Kau).
Leptogomphus elegans hongkongensis
Asahina 1988
:
Asahina (1988: 691–693
, figs 7–11, type-loc. Lam Tsuen Valley,
Hong Kong
);
Matsuki
et al
. (1990: 15–17
, figs 16–18,
Hong Kong
);
Chao (1990: 297
, 293–294, 6 figs,
Hong Kong
);
Saito & Ogata (1995: 33
, figs 41–44,
Hong Kong
);
Wilson (1995b: 324–325
,
Hong Kong
);
Muraki
et al
. (1996: 4
,
Hong Kong
);
Matsuki (1996: 29–32
, larvae,
Hong Kong
);
Wilson (1997a: 31
, Hong Hong);
Hua (2000: 11
,
Hong Kong
);
Wilson (2003: 234–235
, photos,
Hong Kong
); Wilson, (2004a: 236–237, photos,
Hong Kong
).
Specimens:
1 ♂
,
Mid-Levels
,
Hong Kong
,
25 iv 1992
, coll KW
;
1 ♂
,
Mid-Levels
,
Hong Kong
,
27 iv 1992
, coll KW
;
1 ♀
,
Sha Lo Tung
,
6 vi 1992
, coll KW
;
1 ♂
,
16 vi 1993
, Sha Lo Tung, coll KW;
1 ♀
,
Sunset Peak
,
Lantau
,
Hong Kong
,
25 v 1996
, coll. KW
;
1 ♀
,
Sha Lo Tung
,
Hong Kong
,
14 v 2000
, coll. KW
;
4 ♂
,
1 ♀
,
Sunset Peak
,
Lantau
,
Hong Kong
,
24 v 2002
, coll. KW
.
FIGURE 4(a–h):
Fukienogomphus prometheus
, Guangdong. [a–e] ♀—(a) head, frontal, (b) synthorax, dorsal; (c) synthorax, lateral, (d) caudal abdomen, lateral, (e) caudal abdomen, dorsal; [f–h] ♂—(f) caudal abdomen, dorsal, (g) caudal abdomen, lateral, (h) different specimen, caudal abdomen, lateral.
FIGURE 5(a–m):
Leptogomphus hongkongensis
stat. nov.
, Hong Kong. [a–e] ♂, from
Asahina (1988)
—(a) head, frontal, (b) synthorax, (c) caudal appendages, lateral, (d) caudal appendages, dorsal, (e) hamuli; [f–k] ♂ —(f) synthorax, lateral, (g) secondary genitalia, lateral, (h) anterior left hamuli, anterior, (i) anterior left hamuli, posterior, (j) caudal abdomen, dorsal; [k–m] ♀—(k) head, frontal, (l) occipital margin, frontal, (m) postgenital plate.
FIGURE 6(a–i):
Leptogomphus elegans
Fujian. [a–e] ♂, from
Asahina (1988)
—(a) head, frontal, (b) synthorax, (c) caudal appendages, lateral, (d) caudal appendages, dorsal, (e) hamuli; [f–g] ♀, from
Chao (1990)
—(f) occipital margin, frontal, (g) postgenital plate, ventral; [h–i] ♀ from
Lieftinck (1948)
—(h) occipital margin, frontal, (i) postgenital plate, ventral.
Remarks:
Asahina (1988)
described and illustrated
Leptogomphus elegans hongkongensis
based on the
type
male collected from Lam Tusen Valley,
Hong Kong
, a further male also collected from Lam Tsuen Valley and a male collected from Tai Po Kau (
Figs. 5a–e
). Originally
Asahina (1965)
thought his material might be a subspecies of
Leptogomphus perforatus
Ris
, but after examining specimens collected by Eric Schmidt from Kuatun, Fujian Province
Asahina (1988)
considered
Hong Kong
specimens, “to be a local race of
elegans
.” Asahina did not have the benefit of examining any female specimens. It is clear from studying several female specimens that
Hong Kong
females are also structurally distinct from
L. elegans
. The occipital horns of
L. hongkongensis
(
Figs. 5k–l
) are widely divergent compared to
L. elegans
which has vertical horns (
Fig. 6f & 6h
). In addition the subgenital plate of
L. hongkongensis
(
Fig. 5i
) is slightly broader and more divergent when compared with
L. elegans
(
Figs.
6g
& 6i
). There are also clear structural differences between male
L. hongkongensis
and
L. elegans
. Male
L. hongkongensis
is easily separated by comparing the branches of the inferior appendage, which in
L. hongkongensis
converge together at their tips and almost touch (
Fig. 5j
), whereas in
L. elegans
the branches are widely separated (
Fig. 6d
). In addition both male and female
L. hongkongensis
of all specimens examined possessed a greyish-yellow blotched area which impinges on the upper yellow stripe across the metepisternum and the upper yellow stripe covering the metepimeron (
Fig. 5f
). This blotch is not an artifact of preservation and can be seen in specimens photographed
in vivo
(Wilson 1995, 2003, 2004a).
It is noteworthy that a female
Leptogomphus elegans
collected by G.T. Reels from Wutongshan,
16–17 May 2001
(
Fellowes
et al.
2002d
), which possessed vertical (parallel-sided) occipital horns. Wutongshan is located in Guangdong close to the
Hong Kong
border.
Leptogomphus elegans
s. str.
is recorded from Guangxi, Fujian and Guangdong (
Chao 1990
).
Distribution:
China
(
Hong Kong
).