Hedriocystis brachypous
Hedriocystis brachypous - Oppad, the Netherlands

 

 

Hedriocystis brachypous (De Saedeleer, 1930) Siemensma, 1981

Basionym: Monomastigocystis brachypous De Saedeleer, 1930

 

Diagnosis: Shell colorless, hyaline, polygonal in circumference; holes on top of conical protuberances; stalk not present or shorter than the shell diameter; stalk connected to a somewhat elongated conical protuberance; axopodia finely granulated; nucleus centrally located, zoospores with one flagellum.

 

Dimensions: Test 13.0-21.1 µm.

 

Ecology: on waterplants and in sediments of mesotrophic ponds and ditches. I found this species recently in Groeneveld and along the Oppad, both in the Netherlands. This species is known from Europe and North-America (Charles Krebs)

 

Remarks: The shell can only be distinguished from Hedriocystis pellucida by its short or absent stalk.

Look here for the feeding process of Hedriocystis.

Hedriocystis brachypous
Cysts
Hedriocystis brachypous
Hedriocystis brachypous
Left: cyst, right: trophozoite
Hedriocystis brachypous
Hedriocystis brachypous - Photomicrograph: Charles Krebs
Hedriocystis brachypous
Hedriocystis brachypous - from Siemensma, 1982