Atlanticellodinium tregouboffi
Diagnosis
Diagnosis_Genus: Atlanticellodinium Cachon & Cachon-Enjumet 1965. Enplasmic parasite that feed by phagotrophy. Successive sporogeneses are observed.
Diagnosis_Species: A. tregouboffi Cachon & Cachon-Enjumet 1965. Active penetration of the parasite in the host ectoplasm, first infesting stage observed had 5-6 µm in diameter. The parasite penetrate the endoplasm throughout pores located in the phaeodium, where the parasite starts to growth (10 µm) but remained uninucleated. Feeding of the trophont by phagotrophy, through a cytopharynx, located at the hyposome devoid of nucleus and surrounded by a fibrous membrane. Orifice (the cytostomal perforation) has 3 µm of diameter is located in the midle of the hyposome. This structure is intimely fixed to the host cytoplasm. Nuclei (4) are located in the episome, which is surrounded by a thin cytoplasmic membrane. Nuclei divided, whilst the episome produces constrictions where sporonts individualised. Constrictions reproduced several times as 3 articles (maximum) have been observed per episome, without knowning if this phenomenon is continuous or not. Uninucleated and aflagellated sporonts of 12-15 µm of diameter are then released from these articles. Spore unknown. 4, may be 5 chromosomes.
Type species
This is the type species of the genus.
Type illustration / Type locality / Type specimen
Type host: Planktonetta atlantica.
Ecology
Substrate: endozoic
Salinity: marine
Life cycle
Phases_alternance: haplontic
Reproduction_mode: asexual
Symbiont: horizontal_active-penetration
Feeding behaviour
Reference(s)
Observation site(s)
HOSTS
Association with... | Region origin | Name of site | In reference... |
---|---|---|---|
Planktonetta atlantica | off Portugal |
Atlanticellodinium tregouboffi nov. gen. nov. sp., péridinien Blastuloidae Neresheimer, parasite de Planktonetta atlantica Borgert, phaeodarié atlanticellide. Cytologie, cycle biologique, évolution nucléaire au cours de la sporogénèse. Archives de Zoologie Expérimentale et Générale 105:369-379. (1965) |