Armatalona Sinev, 2004

Sinev, Artem Y., 2016, Key for identification of Cladocera of the subfamily Aloninae (Anomopoda: Chydoridae) from South-East Asia, Zootaxa 4200 (4), pp. 451-486 : 463-464

Armatalona Sinev, 2004

Parthenogenetic female short description. Body oval, of moderate height, head and valves without a keel ( Fig. 8A ). Sculpture of valves as weakly developed longitudinal lines or tubercules. Posteroventral angle of valves without denticles or with 1–2 denticles in some speciemns. Rostrum short. Two main head pores with a narrow connection between them, lateral head pores minute. Labral keel of moderate width, with a rounded apex, without clusters of setulae on posterior margin; in some species, anterior margin of keel with a denticle or setule.

Postabdomen short and wide, with anal margin two times longer than postanal one, without defined distal angle and distal margin ( Fig. 8B ); length about 2.2–2.7 heights. Preanal angle and postanal angles well-defined. Postanal denticles short. Postanal lateral groups of setulae with long and thick distalmost seta; in distalmost groups, length of distal setulae about 1.5 widths of base of postabdominal claw. Postabdominal claw short, curved, with short basal spine.

Antennule without lateral aesthetascs, all terminal aesthetascs of similar length. Antennal seta without basal peg. Antenna with spine-like seta on basal segment of endopodite ( Fig. 8C ). Spine on basal segment of exopodite of similar length than middle segment. Spines on apical segments shorter than apical segments. IDL of limb I with three setae; seta 1 short, setae 2–3 armed with thin setulae.

Single species, Armatalona macrocopa Sars, (1894) ( Fig. 8A–C ). Length up to 0.39 mm. Australasian species, known from Australia, New Zealand and North-East Thailand (Sinev et al. 2007). Rare in the region. For description see Sinev (2004).

Figures

FIGURE 8. A – C. Armatalona macrocopa (Sars, 1894). A, lateral view. B, postabdomen. C, antenna. D – F, Camptocercus vietnamensis Thanh, 1980. D, lateral view. E, postabdomen. F, postanal margin of postabdomen. G – H, Camptocercus uncinatus Smirnov, 1971. G, postabdomen. H, postanal margin of postabdomen. I – L, Celsinotum macronyx (Daday, 1898). I, lateral view. J, head pores. K, postabdomen. L, antenna. (A – C, from Sinev et al., 2007; D – F, from Sinev, 2011; G – H, from Sinev (2014); I – L, from Sinev & Kotov (2012 )).