Notoalona Rajapaksa & Fernando, 1987

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 : 480

Notoalona Rajapaksa & Fernando, 1987

Parthenogenetic female short description. Body rounded ( Fig. 15A ), with convex ventral margin, head and valves without keel. Valves without a sculpture. Posteroventral angle of valves without denticles. Rostrum short, truncated, with clear lateral notch at the base. Main head pores absent, lateral head pores located very close to each other, minute, with bean-shaped cavities under them ( Fig. 15B ). Labral keel of moderate width, with a convex anterior margin and rounded apex; usually with several small denticles in lower portion ( Fig. 15C ) and without clusters of setulae on posterior margin.

Postabdomen ( Fig. 15D ) elongated, strongly narrowing distally in postanal portion, with rounded distal angle; length about 2.5–3 heights in Asian species. Preanal and postanal angles well-defined. Postanal denticles very small. Postanal lateral groups with very long and thick distalmost setule; in distalmost groups length of setulae about two widths the base of postabdominal claw. Postabdominal claw short, weakly curved, with basal spine of variable length.

Antennule without lateral aesthetasc; all terminal aesthetascs of similar length. Antennal seta arising from a well-defined tubercule. Antenna ( Fig. 15E ) with thin seta on basal segment of endopodite. Spine on basal segment of exopodite very short. Spines on apical segments about 1/4 the length of apical segments. IDL of limb I with three setae ( Fig. 15F ); seta 1 of moderate size, armed with thick spinulae, seta 2–3 thick, armed with strong spinules.

Figures

FIGURE 15. A – F, Notoalona globulosa globulosa (Daday, 1898). A, lateral view. B, head pores. C, labrum. D, postabdomen. E, antenna. F, IDL of limb I. G – H, Notoalona pseudomacronyx Van Damme, Maiphae & Sa-Adrit, 2013. G, lateral view, H, postabdomen. I – M, Oxyurella singalensis (Daday, 1898). I, lateral view. J, head pores. K, postabdomen. L, postanal margin of postabdomen. M, IDL and ODL of limb I. N – P, Salinalona sarasinorum (Stingelin, 1900). N, lateral view. O, postabdomen. P, IDL and ODL of limb I. (Orig.)