Key for identification of Cladocera of the subfamily Aloninae (Anomopoda: Chydoridae) from South-East Asia
Author
Sinev, Artem Y.
text
Zootaxa
2016
4200
4
451
486
journal article
37712
10.11646/zootaxa.4200.4.1
385be9e3-2309-4de5-9bff-80f724cf4892
1175-5326
191528
5DF1767F-71A9-451F-A418-D1D47A853586
Kurzia
Dybowski & Grochowski, 1894
(subgenus
K. (Rosrokurzia)
Hudec, 2000
)
Parthenogenetic female short description.
Body high oval, with a convex ventral margin; head and valves without a keel (
Fig. 11
L, 12A). Sculpture of valves as longitudinal lines. Posteroventral angle of valves without denticles. Rostrum moderately long and narrow. Three main head pores with a narrow connection between them; lateral head pores minute. Labral keel of variable morphology, without clusters of setulae on posterior margin.
Postabdomen (
Fig. 11
N) long, narrow, curved and narrowing distally in postanal portion, with protruding distal angle with rounded apex; length about 3.5–4.5 heights. Preanal angle well-defined; postanal angle weakly defined. Postanal denticles of moderate size. in groups; their length do not exceed width of postabdominal claw base (
Fig. 11
O, 12D). Postanal lateral groups of setulae short, shorter than the width of base of postabdominal claw. Postabdominal claw long, weakly curved, with a very short basal spine.
Antennule without lateral aesthetasc, terminal aesthetascs of variable length. Antennal seta without basal peg. Antenna (
Fig. 13
P) with thin seta on basal segment of endopodite. Spine on basal segment of exopodite very short. Spines on apical segments less than 1/3 length of apical segments. IDL of limb I with three setae; seta 1 of moderate length, setae 2–3 thin, armed with strong spines.
Taxonomic notes.
K. brevilabris
and
K. longirostris
can be clearly differentiated by morphology of labrum and head pores.
Hudec (2000)
allocated these two species to the subgenus
Kurzia (Rostrokurzia
)
Hudec, 2000
. Most of the earlier records for the region belong to
Kurzia longirostris
, but these two species were confused in many works, including these of
Idris (1983)
and
Maiphae (2014)
, thus the frequencies of each species in the region cannot be approximated at the moment.