Alona davidi, (Richard, 1895)

Neretina, Anna N. & Sinev, Artem Y., 2016, A revision of the genus Leberis Smirnov, 1989 (Cladocera: Chydoridae) in the Old World and Australia, Zootaxa 4079 (5), pp. 501-533 : 509-510

Leberis davidi (Richard, 1895)

( Fig. 5 )

Material examined. 10 parthenogenetic females from a small pond located in Playa de Guanabo, near Habana, Cuba, coll. 15.10.1987 by Y.S. Reshetnikov, NNS-1997-187.

Remarks on morphology. Our data confirmed observations by Sinev et al. (2005) that in L. davidi ODL limb I is supplied by: (1) accessory seta ( Fig. 5E : acs); (2) a small hillock located approximately midway between base of ODL seta and accessory seta; (3) IDL with a rudimentary seta on inner face ( Fig. 5E : rs). Epipodites of thoracic limbs III, IV and V have finger-like projections.

The short seta on IDL of limb I is supplied by a row of setules equal in thickness along the full length of its distal segment ( Fig. 5E ). In smaller studied specimens, anterior margin of labrum is almost convex. In most cases, the spine on basal segment of antenna II exopod is slightly shorter than middle segment. But in some individuals this spine is almost equal in length to the middle segment ( Fig. 5C ).

The number of long aesthetascs on antenna I in female in this species should be reexamined in the future. Sinev et al. (2005) reported three long aesthetascs in parthenogenetic females, although it is not obvious in their illustrations (e.g. fig. 111). At the same time, in other species of Leberis there are two long aesthetascs on antenna I.

Figures

FIGURE 5. Leberis davidi (Richard, 1895), parthenogenetic female from small pond located in Playa de Guanabo, near Habana, Cuba, coll. 15.10. 1987 by Y. S. Reshetnikov. A, Adult parthenogenetic female, general view. B, Armature of posteroventral portion of valve, inner view. C, Antenna II. D, Corm of limb I. E, Distal part of limb I. Scale bars 0.1 mm.