90 a. Distinct free flap (duplicature) narrow, not rounded on distal end, joining the ventral margin at right angle. Eye relatively small. Size 800 μm. Planktonic, inhabiting different water bodies, including acid, turbid (Laguna de Bay) and slightly brackish (up to 2 o/oo) waters.
(Figures 90a1, 90a2, 90a3)
- Laguna de Bay (juvenile, adult), Taal Lake.
Diaphanosoma excisum, SARS, 18861
[1978a+b, 1980, 1984a, 1986a, 2011b+c]
D. excisum from Laguna de Bay
90 b. Distinct free flap (duplicature) broad, rounded on distal end, with feathered and naked setae on edge. Head small. Eye big. With 8 setae on distal upper segment of antennal branch (see note). Adapted to life near shore shallow waters: The swimming function of the 2. antenna is adapted to contact with the substratum (lower branch is more developed) and 1. antenna relatively large. Large ventral flap (duplicature)) on the shell (carapace) protect the filtering limps from clogging. (Korovchinsky, 1986). Inhabiting different water bodies: lakes, reservoirs, ponds, swamps, rivers, rice fields and pools. Probably mainly in the littoral zone and shallow vegetated waters, but also in pelagic zone of some large lakes. pH range 5.8-8.4. Very common.
- La Mesa Dam, Tadlac Lake, Taal Lake, Lake Lanao,
Illaguen River, Ixabila, North-Eastern Luzon, Paoay Lake.
Diaphanosoma sarsi, RICHARD, 1895
[1938c, 1941a, 1966, 1973, 1978a+b+d 1979b,
1986a, 2000, 2001a+c, 2005a (D. sp.), 2008b, 2011a+b+c]
D. sarsi From Taal Lake.
Rey Donne S. Papa
D. sarsi. From Taal Lake. Rey Donne S. Papa
Note: Diaphanosoma celebensis, STINGELIN, 1900, with distinct free flap (duplicature) rounded on distal end like D. sarsi, but with naked setae and setules. With only 7 setae on distal upper segment of antennal branch is found in the region outside the Philippines.
Some littoral species of the family can be found sporadically in pelagic plankton samples like Latonopsis australis SARS (Taal Lake [1938c, 1966, 2001a, 2011a]), which was found adapted to planktonic life in a lake on Sumatra (Woltereck, 1941a), and Pseudosida bidentata, se Mamaril (1986a) and Korovchinsky (1992).
To 91a
