CONOCHILIDAE, (REMANE, 1933) (family)
Jaws malleoramate.
CONOCHILUS, EHRENBERG 1834
Foot fairly stout, without toes. Lorica absent, i.e. cuticle thin and flexible, not usually retaining its shape well after preservation. A gelatinous, transparent case around foot and part of the body Head not funnel-like. Solitary (Conochiloides) or in colonies (Conochilus). Conochilus disappered from Laguna da Bay
in periods with relativily high salinity, thus showing
sensitivity to the increased salinity. Formalin-preserved specimens separated from gelatinous case. Formalin-sugar-preserved specimens still in gelatinous case, usually strongly contracted. Antenna present, planktonic. The genus Conochilus, EHRENBERG 1834, and Conochiloides, HLAVA 1904, can be separated based on the degree of fusion of the antennae. However, intermediates between total fused and unfused antennae are found and the two genera will be treated as one (Conochilus) with two separate groups (Ruttner-Kolisko 1972).
74 a. Antenna more or less separated,
CONOCHILOIDES GROUP.................................7574 b. Antenna fused completely or nearly so,
CONOCHILUS GROUP....................................76CONOCHILOIDES GROUP
75 a. Antennae largely fused proximally to about
one-third the length and free and the distal end,
situated below corona. Basal mound is lacking.
Mouth central. Right uncus has five large teeth,
the left uncus three. Solitary in gelatinous
case – not colonial. Body vase shaped.
Size (without case, expanded) 250 μm.
Feeds on unicellular algae up to 18 μm
and shows affinity to bluegreen-algae
in Lake Lanao (Lewis 1979b). Planktonic
in lakes and ponds, thermophilic.
- Laguna de Bay, Lake Mainit, Lake Lanao, Paoay Lake.
Conochilus dossuarius, (HUDSON, 1885)
(syn. Conochiloides dossuarius)
[1941, 1973, 1977, 1978a,b,d 1979b,
1980, 1984, 1986, 2003, 2008b]
C. dossaurius from Laguna de Bay
C. dossaurius from Bunot Lake
75 b. Ventral antennae arise from a mound-like
expansion of equal length as the antennae,
which are separated in their total length.
Ventral antenna prominent. The foot is short
and almost entirely contracted when fixed.
Each uncus has three large teethes; one of
the teeth of the left uncus is divided into
three branches, however. Total length 160 μm.
Body length 110-115 μm;
- IRRI Ricefield, Lake Danao
Conochilus coenobasis SKORIKOV, 1914.
[1999]
CONOCHILUS GROUP
76 a. Antenna fused completely or nearly so,
situated in the mouthfield or the corona,
mouth dorsal. In colonies of varying size
(5-12 individuals), living together
in a spherical gelatinous hull.Planktonic
in oligotrophic lakes and ponds.
- Laguna de Bay, Sampaloc Lake.
Conochilus unicornis, (ROUSSELET, 1892)
[1980, 1984]
C. unicornis from Laguna de Bay
C. unicornis fromSampaloc Lake
To 77a
