Meroselenidium

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Meroselenidium
Scientific classification
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Genus:
Meroselenidium
Species

Meroselenidium keilini

Meroselenidium is a genus of parasitic alveolates in the phylum Apicomplexa. Species in this genus infect marine invertebrates.

Contents

Taxonomy

This genus was described by Mackinnon and Ray in 1933. There is one species in this genus – Meroselenidium keilini.

Description

The trophozoites live within the gut lumen. They measure 200–300  μm × 40–70 μm. There are 30–40 grooves along the body. Four refringent rods are present in the mucron. A vacuole may also be present in the mucron.

Schizogony occurs in the intestinal epithelium and gives rise to multiple merozoites.

Synergy is caudo-caudal. The gametocysts are 70 μm × 55 μm and give rise to multiple gametes. After fertilization the zygote gives rise to ~20 sporocysts. There is no residual body. The sporocysts are bivalved and give rise to multiple sporozoites.

The species in this genus, Merselenidium keilini, forms transversely striated folds. [1]

Life cycle

This species infects the anterior intestine of the polychaete Potamilla reniformis .

The parasite infects the gastrointestinal tract and is presumably transmitted by the orofaecal route but the details of this mechanism are presently unknown.

Related Research Articles

<span class="mw-page-title-main">Apicomplexa</span> Phylum of parasitic alveolates

The Apicomplexa are a large phylum of mainly parasitic alveolates. Most of them possess a unique form of organelle that comprises a type of non-photosynthetic plastid called an apicoplast, and an apical complex structure. The organelle is an adaptation that the apicomplexan applies in penetration of a host cell.

<i>Sarcocystis</i> Genus of protists in the apicomplex phylum

Sarcocystis is a genus of protozoan parasites, with many species infecting mammals, reptiles and birds. Its name is dervived from Greek sarx = flesh and kystis = bladder.

The genus Schellackia comprises obligate unicellular eukaryotic parasites within the phylum Apicomplexa, and infects numerous species of lizards and amphibians worldwide. Schellackia is transmitted via insect vectors, primarily mites and mosquitoes, which take up the parasite in blood meals. These vectors then subsequently infect reptilian and amphibian which consume the infected insects. The parasites deform erythrocytes of the host into crescents, and can be visualised using a blood smear.

Atoxoplasma is a genus of parasitic alveolates in the phylum Apicomplexa. The species in this genus infect birds. They are spread by the orofaecal route.

Calyptospora is a genus of parasitic protozoa in the phylum Apicomplexa.

Dorisiella is a genus of parasitic alveolates belonging to the phylum Apicomplexa. This genus was created in 1930 by Ray.

Barrouxia is a genus of parasitic alveolates belonging to the phylum Apicomplexa.

Epieimeria is a genus of parasitic alveaolates of the phylum Apicomplexa.

Klossiella is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect the renal tract of mammals and intestinal tract of snakes.

The Archigregarinorida are an order of parasitic alveolates in the phylum Apicomplexa. Species in this order infect marine invertebrates — usually annelids, ascidians, hemichordates and sipunculids.

Hyaloklossia is a genus of parasitic alveolates in the phylum Apicomplexa. Only one species in this genus is currently recognised - Hyaloklossia lieberkuehni.

The Neogregarinorida are an order of parasitic alveolates in the phylum Apicomplexa. Species in this order infect insects and are usually found in the fat body, hemolymph, hypodermis, intestine or Malpighian tubules. The most common site of infection is the fat body: many species are pathogenic for their hosts.

Sivatoshella is a genus of parasitic alveolates in the phylum Apicomplexa.

Ovivora is a genus in the phylum Apicomplexa.

Polysporella is a genus in the phylum Apicomplexa. Species in this genus infect birds. This genus has been poorly studied and little is known about it.

Pseudoklossia is a genus in the phylum Apicomplexa. Species in this genus infect marine molluscs, although one species infects in an ascidian worm. The life cycle is heteroxenous.

Blastogregarinorina is a suborder of parasitic alveolates of the phylum Apicomplexia

Mattesia is a genus of parasitic alveolates of the phylum Apicomplexa. Species in this genus infect insects.

Merogregarina is a genus of parasitic alveolate in the phylum Apicomplexa. Species in this genus infect marine invertebrates.

The Diplocystidae are a family of parasitic alveolates in the phylum Apicomplexa.

References

  1. Brian S. Leander (23 November 2006). "Molecular phylogeny and ultrastructure of Selenidium serpulae (Apicomplexa, Archigregarinia) from the calcareous tubeworm Serpula vermicularis (Annelida, Polychaeta, Sabellida)" (PDF). Zoologica Scripta. The Norwegian Academy of Science and Letters. 36 (2): 213–227. doi:10.1111/j.1463-6409.2007.00272.x. S2CID   85645881. Archived (PDF) from the original on 9 December 2016. Retrieved 9 December 2016.