Ophryocystidae | |
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Family: | Ophryocystidae |
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The Ophryocystidae are a family of parasites in the phylum Apicomplexa. [1] Species in this family infect insects (Coleoptera and Lepidoptera).
This family was created by Léger and Duboscq in 1908.
One genus is placed in this family - Ophryocystis - with at least 10 species. This is the type family of the order Neogregarinorida .
Most species in this family infect the Malpighian tubes of beetles.
The trophozoite is conical in shape.
Two types of schizogony occur in this family. In the first type the schizonts divide into merozoites with small nuclei. These are known as mycetoids merozoites. These develop into trophozoites. In the second form and more common form, the schizonts divide into merozoites with large nuclei: these are known as gregarinoid merozoites and give rise to gametocytes.
The merozoites are uninucleated, pyriform cells. These are released into the lumen of the tube and from there infect other cells of the tube.
The gametocytes possesses only a single nucleus and are globular in shape. When mature, these become detached from the epithelium. Within the lumen, the gametocytes associate in pairs, fuse and form a zygote.
The zygote subsequently becomes a single octozoic spore.
A gametocyte is a eukaryotic germ cell that divides by mitosis into other gametocytes or by meiosis into gametids during gametogenesis. Male gametocytes are called spermatocytes, and female gametocytes are called oocytes.
Leucocytozoon is a genus of parasitic alveolates belonging to the phylum Apicomplexa.
Megaloschizonts are large schizonts that produce extremely high numbers of merozoites. They are found in various species of the Phylum Apicomplexa. The Apicomplexa phylum contains several parasitic protozoans. They have a very complex life cycle that includes several stages. Megaloschizonts and the smaller schizonts are the part of the life cycle that takes place inside the infected host organism and operates as an asexually reproductive cell. Megaloschizonts appear as grey-white nodules found in the smooth muscle of major organs, such as the heart, liver, lung or spleen.
Plasmodium juxtanucleare is a species of parasite in the family Plasmodiidae. The vertebrate hosts for this parasite are birds.
Plasmodium fieldi is a parasite of the genus Plasmodium sub genus Plasmodium found in Malaysia. This species is related to Plasmodium ovale and Plasmodium simiovale. As in all Plasmodium species, P. fieldi has both vertebrate and insect hosts. The vertebrate hosts for this parasite are primates.
Karyolysus is a genus of coccidia. With the exception of K. sonomae whose vertebrate host is the yellow-legged frog, species in this genus only infect lizards of the genus Lacerta.
Plasmodium vaughani is a parasite of the genus Plasmodium, and the type species of the subgenus Novyella. As in all Plasmodium species, P. vaughani has both vertebrate and insect hosts. The vertebrate hosts for this parasite are birds.
Apicomplexans, a group of intracellular parasites, have life cycle stages evolved to allow them to survive the wide variety of environments they are exposed to during their complex life cycle. Each stage in the life cycle of an apicomplexan organism is typified by a cellular variety with a distinct morphology and biochemistry.
Plasmodium alaudae is a parasite of the genus Plasmodium.
Plasmodium carmelinoi is a parasite of the genus Plasmodium.
Leucocytozoon caulleryi is a species of the genus Leucocytozoon, a genus of parasitic alveolates.
Selenococcidium is a genus of parasitic alveolates in the phylum Apicomplexa. There is one recognised species in this genus - Selenococcidium intermedium. This species infects the intestinal tract of European lobsters.
The Schizocystidae are a family of parasitic alveolates in the phylum Apicomplexa. Species in this family infect insects.
Caulleryella is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects (Diptera).
Farinocystis is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects (Coleoptera).
Mattesia is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects.
Plasmodium coatneyi is a parasitic species that is an agent of malaria in nonhuman primates. P. coatneyi occurs in Southeast Asia. The natural host of this species is the rhesus macaque and crab-eating macaque, but there has been no evidence that zoonosis of P. coatneyi can occur through its vector, the female Anopheles mosquito.
Schizogregarinina is a superfamily in the phylum Apicomplexia.
Schizocystidae is a genus of parasitic alveolates in the phylum Apicomplexa.
Lipocystis is a genus of parasitic alveolates of the phylum Apicomplexa.
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