Crepidoodinium australe

Super Group: 
Alveolata
Phylum: 
Dinophyta
Class: 
Dinophyceae
Genus: 
Crepidoodinium
Species: 
australe
Authority: 
Lom, Rohde & Dykova 1993

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

Osmotrophy
Photosynthetic

Mode of locomotion

Flagellum_spore:2

Observation site(s)

HOSTS

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