Chydorus cf. sphaericus (Mueller, 1785)

Dela Paz, Erica Silk P., Lopez, Mark Louie D., David, Christian Irvin Harvey A., Dela Cruz, Dave Ryan A., Viernes, Gian Alfonso A., Wong, Jac Fritgerald & Papa, Rey Donne S., 2018, Freshwater microcrustaceans (Cladocera: Anomopoda and Ctenopoda, Copepoda: Cyclopoida and Calanoida) in the highly urbanized Metropolitan Manila area (Luzon, Philippines), Check List 14 (5), pp. 751-762 : 754

Chydorus cf. sphaericus (Mueller, 1785)

Materials examined. Philippines: Luzon: Manila: Ninoy Aquino Parks and Wildlife Lagoon (14.6512° N, 121.0432° E), coll. DRA Dela Cruz, GAA Viernes, JF Wong, ESP Dela Paz and ML Lopez, June 2016, ( UST- ZRC 0101A–C, 3 spec.).

Short description. The body is hemispherical in shape, with no clear demarcation between the head and the body dorsally. The head shield is present. The rostrum is relatively longer than the antennule. A pair of 3-segmented second antennules with 3 projecting setae is found inferior to the antennule. The terminal claw is almost straight, with small spines. The postabdomen is short with pointed denticles on the postero-ventral margin. The morphological characteristics concur with the descriptions and illustrations of Fryer (1968), Petersen and Carlos (1984), Fernando (1992), Smirnov (1996), and Dumont and Negrea (2002).

Ecological distribution. Chydorus cf. sphaericus is present in lakes, reservoirs, and pools. This species is found in the littoral vegetation and pelagic area but can survive eutrophic conditions.