Haematractidium

Haematractidium is a genus of parasitic alveolates in the phylum Apicomplexa. It infects the Atlantic mackerel (Scomber scombrus).

Haematractidium
Scientific classification
Domain:	Eukaryota
(unranked):	SAR
(unranked):	Alveolata
Phylum:	Apicomplexa
Class:	Aconoidasida
Order:	Achromatorida
Family:	Haemohormidiidae
Genus:	Haematractidium
Species
Haematractidium scombri

History

This genus was first described by Henry in 1910. Although it is occasionally re described^[1] very little is known about it.

Taxonomy

There is one known species in this genus: Haematractidium scombri.

Description

The parasite is intra erythrocytic, ameboid, oval or pyriform in shape. There are no vacuoles or reticulation in the cytoplasm. The nucleus has two or more chromatin granules. The parasite has a single membrane.