GASTROPODIDAE, {REMANE, 1933) (family)
Jaws virgate. Mostly littoral and only a few planktonic species.
ASCOMORPHA, (PERTY 1850)
63 a. With 4 small dark masses (accretion bodies).
Body sack-shaped, green colored. Size 100 μm.
Food unicellular green algae, which are
digested intracellularly, or stay alive
and multiply as zoochlorella in the body wall.
Planktonic in lakes and ponds, also in saline waters.
- Laguna de Bay
Ascomorpha ecaudis, (PERTY, 1850)
(syn. Sacculus viridis).
[1980, 1984]
A. ecaudis from Laguna de Bay
ASPLANCHNIDAE, HARRING & MYERS 1926 (family)
Lorica absent, i.e. cuticle thin and flexible,
not usually retaining its shape well after
preservation. Large sack-shaped, with corona
(wheel organ) anteriorly. Rather big viviparous
rotifers Planktonic family. Jaws incudate.
Curved, sharp-pointed rami like pincers.
Seizing type. Intestine and anus absent. Asplanchna
releases a waterborne signal that induces spine
formation in several Brachionus and Keratella species
and Filinia longisecta (Snell, 1998), while the
presence of Asplanchna could be responsible for the
development of spines in these genera if present together.
Planktonic.
ASPLANCHNOPUS, DE GUERNE 1888
With foot.
64 a. Intestine and anus absent. Size 700-1000 μm.
Ovary horseshoe-shaped. Semiplanktonic in large
and small waters, sometimes numerous. Commen.
- Paoay Lake, Lake Lanao, Pasig River and
Quezon City: UP. Campus, Los Baños.
University of Santo Tomas: abandoned pond
(Rey Donne S. Papa, private communication)
Asplanchnopus multiceps, (SCHRANK, 1793)
[1978a,b, 1986, 2008b, 2009]
A. multiceps (foto Rey Donne S. Papa)
A. multiceps (foto Rey Donne S. Papa)
ASPLANCHNA, GOSSE 1850
Without a foot.
Pasig River
[2009]65 a. Yolk gland (vitellarium) round. Size 500-1500 μm.
Feed on diatoms, dinoflagellates and Chrysophyseae,
but predate also on rotifers as Keratella, Polyarthra
and Anuraeopsis. Planktonic in lakes and ponds,
often numerous, also found in brackish water.
ASPLANCHNA or PRIODONTA GROUP.
- Laguna de Bay.
Asplanchna priodonta, (GOSSE, 1850)
[1941, 1980, 1984]
A. priodonta from Laguna de Bay
65 b. Yolk gland horseshoe-shaped. Size 500-2500 μm.
Feed on Volvocales, Chlorococcales and several
genera of rotifers including their own.
Planktonic in freshwater, also in brackish
ASPLANCHNELLA or GIRODI-BRIGHTWELLI GROUP.
- Calibato Lake, Tadlac Lake.
Asplanchna sieboldi (LEYDIG, 1854)
[1941, 1980, 1984]
To 66a
