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Scientific classification e
Domain: Eukaryota
(unranked): Diaphoretickes
(unranked): SAR
Infrakingdom: Alveolata
Phylum: Apicomplexa
Class: Conoidasida
Subclass: Coccidia
Order: Eucoccidiorida
Family: Dactylosomatidae
Genus: Dactylosoma
Labbé, 1894

Dactylosoma hannesi
Dactylosoma jahni
Dactylosoma lethrinorum
Dactylosoma mariae
Dactylosoma notopterae
Dactylosoma ranarum
Dactylosoma salvelini
Dactylosoma splendens
Dactylosoma sylvatica
Dactylosoma taiwanensis

Dactylosoma is a genus of parasitic alveolates of the phylum Apicomplexia.[1]

Species in this genus have two hosts in their life cycle: the vertebrate host is a fish or amphibian (possibly also reptiles) and the invertebrate host is a glossiphoniid leech (Glossiphoniidae).


This genus was described by Labbé in 1894. The type species is Dactylosoma ranarum.


Merogony: Schizonts in this genus produce 6 to 16 merozoites by simultaneous exogenous budding. These typically are found in a fan shaped arrangement. This occurs within the erythrocytes.

Secondary merogony produces 6 smaller merozoites that are destined to become intraerythrocytic gamonts.

Gametogony: The gametocytes are larger, elongated forms derived from some of the merozoites.

Oocysts are formed after fertilization in the leech intestine. 30 or more sporozoites are produced by exogenous budding directly in the cytoplasm of the intestinal epithelial cells. No oocyst wall is formed.


  1. ^ Manwell RD (1964). "The genus Dactylosoma". J. Protozool. 11 (4): 526–30. doi:10.1111/j.1550-7408.1964.tb01792.x. PMID 14231179.