An annotated checklist of the main representatives of meiobenthos from inland water bodies of Central and Southern Vietnam. I. Roundworms (Nematoda)
Author
Gusakov, Vladimir A.
Author
Gagarin, Vladimir G.
text
Zootaxa
2017
4300
1
1
43
journal article
32584
10.11646/zootaxa.4300.1.1
7eb2410e-8578-432a-88f8-bc129d0a5b08
1175-5326
837117
5FA0C659-9C52-4ABB-9CB6-1FB5CDDDF9F8
Family
Monhysteridae de Man, 1876
103.
Monhysteridae
gen. spp.—
{22, 31, 33} (5, 4, 8, 0;
4
)
Population structure and abundance.
Single females of unidentified genera from each site.
104.
*
Eumonhystera andrassyi
(Bíró, 1969) Andrássy, 1981
—
{52} (0, 4, 0, 0;
1
)
Population structure and abundance.
Two juvenile specimens, two females and male (
2x10
3/m2).
Ecology
and distribution.
Likely
a hydrobiont.
To
date found only in water (lotic and lentic water bodies).
Relatively
rare species.
Found
in several countries of
Europe
and in
China
(
Eyualem
et al.
2001
;
Andrássy
2005
).
Not
previously reported from
Vietnam
.
105.
*
Eumonhystera barbata
Andrássy, 1981
—
{65} (0, 0, 0, 9;
1
)
Population structure and abundance.
Two females.
Ecology and distribution.
Amphibiont. Dwells in water bodies and in wet soil. Relatively rare species. Untilrecently, found only in some countries of Europe, Novaya Zemlya Archipelago,
Vaygach Island
(Arctic,
Russia
), and in
Paraguay
(
South America
) (
Gagarin 1997
,
2001
;
Andrássy 2005
). Probably the first record for Asia.
Remarks.
Males are unknown in this and in the majority of other species of this genus; presumably, reproduction is parthenogenetic (
Andrássy 2005
;
Coomans & Eyualem, 2006
).
106.
*
Eumonhystera dispar
(Bastian, 1865) Andrássy, 1981
—
{54} (0, 4, 0, 0;
1
)
Population structure and abundance.
One gravid female.
Ecology and distribution.
Amphibiont, ubiquitous, dwelling in diverse aquatic and terrestrial biotopes. Reported from several countries of Africa and
North America
, and one of the islands of
Oceania. Widespread in Europe
and Asia (
Andrássy 2005
;
Schabetsberger
et al.
2009
). To date, not reported from
Vietnam
. According to some workers, this is a cosmopolitan species (
Gagarin 1993
;
Schabetsberger
et al.
2009
).
107.
*
Eumonhystera huruii
Peng, Eyualem & Coomans, 2002
—
{34} (0, 0, 8, 0;
1
)
Population structure and abundance.
Single female.
Ecology and distribution.
Possibly a hydrobiont. Rare species. Until this study, found only at two locations in one of the rivers of China (
Peng
et al.
2002
). Our finding marks the third known locality of the species.
108.
Eumonhystera vulgaris
(de Man, 1880) Andrássy, 1981
—
{2} (5, 0, 0, 0;
1
)
Population structure and abundance.
Single female with egg.
Ecology and distribution.
Amphibiont. Cosmopolitan. Found in various aquatic and terrestrial biotopes on all continents, including Antarctica. Already registered in Vietnam (
Andrássy 2005
;
Nguyen 2007
).
109.
Eumonhystera
Andrássy, 1981
sp.—
{62} (0, 0, 0, 9;
1
)
Population structure and abundance.
One gravid female of an undetermined species (not all morphological features are visible on the mount).
110.
**
Monhystera longivaginata
Gagarin & Gusakov, 2013
—
{4–6, 27, 29, 31} (16, 11, 0, 0;
8
)
Population structure and abundance.
At sites 5 and 31—8 to 10 females, including those with eggs, and just one male (up to
4x10
3/m2), at the rest of samples—1 to 3 juvenile specimens and females (or gravid females) (up to
1x10
3/m2).
Ecology and distribution.
Most likely a hydrobiont. New species (
Gagarin & Gusakov 2013a
). To date found exclusively in lakes and reservoirs.
111.
Monhystera stagnalis
Bastian, 1865
—
{14, 58, 63} (0, 4, 8, 9;
4
)
Population structure and abundance.
One female at site 14, two gravid females at site 58, and one male at the third locality.
Ecology and distribution.
Hydrobiont. Prefers aquatic biotopes but may be found sporadically in wet soil near water bodies (
Andrássy 2005
;
Nguyen 2007
).
Widespread in Europe
, reported from some countries of
South America
(Columbia), Africa (
Ethiopia
and
South Africa
), and Asia (
Japan
) (
Andrássy 2005
). According to other sources, cosmopolitan (
Gagarin 1993
;
Tsalolikhin 2015
). Recorded in many regions of
northern Vietnam
(
Gagarin & Nguyen 2005a
;
Nguyen & Nguyen 2005
;
Nguyen 2007
).