Chytriodinium roseum

Super Group: 
Alveolata
Phylum: 
Dinophyta
Class: 
Dinophyceae
Family: 
Chytriodinidae
Genus: 
Chytriodinium
Species: 
roseum
Authority: 
(Dogiel 1906) Chatton 1912
Synonym(s): 
Gymnodinium roseum

Diagnosis

Diagnosis_Genus: Ectoparasite of crustacean eggs.
Diagnosis_Species: C. roseum. Parasite of Meganyctiphanes norvegica eggs which have 600-700 µm in diameter (the vitellus sphere is about 300 µm of diameter). As C. affine, the parasite produces a cylindrical stalk, but then it forms a more robust disk (about 50 µm of diameter) in contact to the vitellus membrane, surrounded by refringent granulations. This disk extends inside the host cytoplasm forming 6 rounded lobes. A large feeding apparatus (100 to 120 µm large at the end of the trophont stage) is located in the central part. Maturation of the trophont does not always prevent the first egg divisions, but then cells are totally digested, visibly by osmotrophy. Rest of the maturation as in C. affine (more sporocytes and thus dinospores are produced, probably because of the larger size of the host egg).

Body_spores_length: 9 µm
Body_spores_wide: 6 µm
Body_trophont: 100 µm

Type species

This is the type species of the genus.

Type illustration / Type locality / Type specimen

Type host: Meganyctiphanes norvegica

Ecology

Substrate: epizoic
Salinity: marine

Life cycle

Generation: <1 month
Reproduction_mode: asexual
Symbiont: horizontal

Feeding behaviour

Osmotrophy
Parasitism

Mode of locomotion

Flagellum_spore:2

Observation site(s)

HOSTS

Displaying 1 - 1 of 1
Association with... Region origin Name of site In reference...
Meganyctiphanes norvegica Villefranche-sur-mer

ASQME static network (beta)

ASQME dynamic network (beta)

ASQME map (beta)