Pleuroxus (Picripleuroxus) cf. quasidenticulatus ( Smirnov, 1996 )

Pascual, Jhaydee Ann F., Rizo, Eric Zeus C., Han, Boping, Dumont, Henri J. & Papa, Rey Donne S., 2014, Taxonomy and distribution of four Cladoceran families (Branchiopoda: Cladocera: Moinidae, Bosminidae, Chydoridae and Sididae) in Philippine inland waters, Raffles Bulletin of Zoology 62, pp. 771-794 : 776

Pleuroxus (Picripleuroxus) cf. quasidenticulatus ( Smirnov, 1996)

Specimen examined. Two parthenogenic female. One mounted (UST-ZRC 0138-Lake Nalbuan, Cagayan). One damaged beyond repair.

Description. The status of Picripleuroxus as a genus has long been strongly argued. The latter has been re-established as a subgenera in recent literatures. Carapace is oval with no distinct characters in the posterior part of the dorsal margin but rather high on its lateral part. Rostrum curved and pointed. Ocellus situated near the tip of the rostrum. Antennae with one spine on the apical ends of the antennal segment. Post abdomen a little bit long and narrowing to the terminal claw. Anal teeth size is decreasing across the length of the post abdomen but variable across population. Terminal claw with two accessory spines near its base. It has only been observed in two lakes in Cagayan province contrary to previous sightings ( Fig. 11 ).

Distribution. Cagayan: Lake Nalbuan, Lake Cansiritan ( Fig. 7 ).

Remarks. Found also in Australia, Iraq, Argentina, Thailand, Vietnam China and Far East Russia. Commonly found in littoral zones of ponds and reservoirs and streams.

Figures

Fig. 11. Pleuroxus cf. quasidenticulatus parthenogenic female. A, habitus; B, antennae; C, post abdomen.

Fig.7. Distribution of family Chydoridae based on recently collected samples (2013) and stored samples in the UST ZRC.