Crepidoodinium australe
Diagnosis
Diagnosis_Genus: Crepidoodinium Lom & Lawler 1981. Ectocommensal on gills of estuarine and marine fishes. Trophont is attached by its basal end flattened into a broad holdfast bearing projections ("rhizoids") with finger-like tips which closely adhere to the host cell membrane without penetrating inside the host cell. No stomopode. Well developped chloroplasts. Theca without plates. An extremely spongy cytoplasm with a system of interlinked lacunae and vacuoles with starch grains, subthecally located mucocysts and acontobolocysts. No digestive vacuoles. Nucleus without interphasic condensed chromosomes. Dinospore without stigma.
Diagnosis_Species: Crepidoodinium australe Lom, Rohde & Dykova 1993. Large flat trophonts with a pointed apex, up to 820 x 235 µm in size. Mature trophonts detach from the host, round up and secrete a cyst envelope. Dinospores are produced by binary fissions within 48 hours. They have a Gyrodinium type, 17x12 µm.
Body_trophont_lenght: 820 µm
Body_trophont_wide: 235 µm
Body_spores_lenght: 17 µm
Body_spores_wide: 12 µm
Etymology
Australe refers to the type locality country.
Type species
The type species for the genus is Crepidoodinium cyprinodontum.
Type illustration / Type locality / Type specimen
Type host: Sillago ciliata
Type Locality: New South Wales, Australia
Ecology
Substrate: epizoic
Sociability_trophont: gregarious
Salinity: variable
Life cycle
Generation: <1 month
Symbiont: horizontal
Feeding behaviour
Mode of locomotion
Reference(s)
Observation site(s)
HOSTS
Association with... | Region origin | Name of site | In reference... |
---|---|---|---|
Sillago ciliata | Nambucca Heads south of Coof Hrabor | (1993) | |
Sillago ciliata | Arrawarra Creek north of Coffs Harbor | (1993) |