Syncystidae

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Syncystidae
Scientific classification
Domain: Eukaryota
Kingdom: Chromalveolata
Superphylum: Alveolata
Phylum: Apicomplexa
Levine 1970
Class: Conoidasida
Levine 1988
Subclass: Gregarinasina
Dufour 1828
Order: Neogregarinorida
Grassé & Schrével 1953
Family: Syncystidae
Schneider 1886
Genera

Syncystis

The Syncystidae are a family of parasitic protozoa in the phylum Apicomplexa. Species in this family infect insects (Aeshnidae).

History[edit]

This family was described by Schneider in 1886.

Taxonomy[edit]

One genus and two species (Syncystis aeshnae, Syncystis mirabilis) are currently recognised in this family.[1]

The type species is Syncystis mirabilis Schneider 1886.

Life cycle[edit]

The development of these parasites is mostly intracellular.

Merogony results in the formation of about 150 elongate, slender merozoites which become spheroidal as they differentiate into amoeboid or spheroidal gamonts.

The gamonts associate in syzygy and subdivide into gametes.

Fusion of the gametes leads to numerous zygotes within the gametocyst which is either spherical or bilobed.

Numerous (30 to 150) oocysts are formed per gametocyst.

The oocysts are navicular and have three or four spines extending from each pole of the wall.

Eight sporozoites form per oocyst.

References[edit]

  1. ^ Tuzet O, Manier JF (1953) Syncystis aeschnae n.sp. Néogrégarine (Schizogrégarine, Léger, 1900) parasite des larves d'Aeschna. Ann Nat Sci Zool IIe ser 15:241-246