Freshwater ostracods (Crustacea) from Tiantong National Forest Park and Dongqian Lake, eastern China, with descriptions of two new species
Author
Ma, Shunxin
Author
Yu, Na
text
Journal of Natural History
2018
2018-07-27
52
27 - 28
1825
1868
http://dx.doi.org/10.1080/00222933.2018.1489085
journal article
10.1080/00222933.2018.1489085
1464-5262
5175156
2D679051-CBA2-4B09-BCF0-E0152EBC2694
Tanycypris alfonsi
Nagler et al., 2014
(
Figures 12a,b
,
13
)
Tanycypris alfonsi
sp. nov.
Nagler et al., 2014: 407–410
, figs. 2–4.
Material examined
Two females (ECNU20140914/TT34; ECNU20140907/TT35) dissected.
Dimensions
(Female,
n
= 3) Length,
1.20–1.33 mm
; height,
0.51–0.53 mm
; width,
0.33 mm
.
Brief description
Female
, in lateral view, both anterior and posterior ends widely rounded. Maximum height anterior of mid-length. Dorsal margin straight. Posterior area with ‘roof-tile’-like structure. In internal view, postero-ventral margin slightly sinuous. A1 seven-segmented, with Rome and Wouters organs; first segment with one dorsal seta. Natatory setae of A2 long, just reaching or slightly exceeding tips of terminal claws. Seta
β
on Md short and hirsute, basally inflated, tapering distally. Two large bristles on third masticatory lobe of Mx1 slightly toothed. L6 fivesegmented, two hirsute setae
d
present on basal segment, seta
d1
slightly longer than seta
d2
, seta
e
slightly exceeding end of next segment. L7 four-segmented, three setae
d
present on basal segment. Both claws on UR with well-developed serration. Claw
Gp
equalling onehalf length of claw
Ga
. Seta
Sa
equalling three-quarters length of claw
Ga
. Seta
Sp
brush-like, with setae distally. UR attachment stout, curved stem with triangular Triebel’ s loop distally. UR attachment with strong, curved dorsal branch and thick and short ventral branch.
Figure 12.
(a, b)
Tanycypris alfonsi
Nagler et al., 2014
. Female. (a) ECNU20140914/TT34, external view of LV; (b) ECNU20140914/TT34, internal view of RV. (c, d)
Tanycypris centa
Chang et al., 2012
. Female. (c) ECNU20140914/TT3601, external view of RV; (d) ECNU20140914/TT36, internal view of RV. Scale bars: 100 μm.
Distribution
This species has only been reported from
South Korea
(
Smith et al. 2015
), and as an alien species in a botanical greenhouse in
Germany
(
Nagler et al. 2014
). It is a new record for
China
.
Remarks
The seta
Sp
of our specimens is morphologically more similar to that of
Tancypris pellucida
than to that of specimens from
Germany
(
Nagler et al. 2014
). The seta
Sp
on the UR of our specimens has a brush-like end (
Figure 13
), and the one from
Germany
is slender, and this character has not been mentioned in Korean specimens (
Smith et al. 2015
).