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COLLOTHECACEA, REMANE 1933 (order)

COLLOTHECIDAE, (BARTHOS, 1959) (family)
Jaws (trophi) uncinate. Only unci well developed. 
Not important since the food is already pre-digested.

COLLOTHECA, HARRING 1913 (syn. Floscularia)
Foot without toes, foot ends in a holdfast or in a circle
of cilia or neither. 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 more or less funnel-like. Foot
long and slender, stalk-like. Single animal in very
transparent gelatinous case, usually contracted. Most
species littoral, few planktonic species, some epiphytic
on roots of Eichornia (Water hyacinth),
(Arora and Mehra, 2003c).

77. In gelatinous case, most species benthic, 
only a few planktonic in lakes.
The genus has been found planktonic,
but the species not yet deter­mined. 
- Laguna de Bay, Sampaloc Lake
    Collotheca fc. pelagica
        [1980, 1984a]

fc = for compare = NOT SURE ABOUT THE SPECIES IDENTIFICATION

Key to planktonic, cosmopolitan Collotheca species
(None yet recorded from the Philippines.
Described species mostly resemble C. pelagica.)

77 a. Corona with 2 lobes. Size 200-500 μm.
Indicator of oligotrophic waters (Sládeček 1983).
Collotheca mutabilis, (HUDSON, 1885)

77 b. Corona unlobed, cilia in 5 groups. Size 300­-500 μm.
Indicator of oligotrophic waters (Sládeček 1983).
Collotheca pelagica, (ROUSSELET, 1893)

 

C.  pelagica  from Sampaloc Lake

77 c. Corona with 1 lobe. Size 120-170 μm,
Collotheca libera, (ZACHARIAS, 1894)

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