IUCN threat status:

Not evaluated

Comprehensive Description

Read full entry

Description of Vairimorpha

Nuclei diplokaryotic and monokaryotic; life cycle dimorphic, with a dominant diplokaryotic, disporoblastic sequence of merogony and sporogony and a temperature dependent monokaryotic, octosporoblastic sporogony; meiosis probably occurs at the onset of the octosporoblastic sporogony; transmission is per os; disporoblastic sequence all stages are in direct contact with host cell cytoplasm, in merogony diplokaryotic cells divide by binary fission or form short chains of diplokaryotic cells, in sporogony: spindle shaped sporonts, initially with a central diplokaryon, later with two diplokarya situated at the poles, prior to disporoblastic division, produce spores, 5.0 - 6.0 x 2.3 - 2.8 µm, ovoid and have a rugose exospore and thick endospore, with lamellar polaroplast with close-packed anterior lamellae and looser posterior lamellae, polar tube isofilar with about 13 coils, arranged in a single rank obliquely round the diplokaryon; octosporoblastic sequence appears most abudantly when the temperature drops below 25° C, in sporogony diplokaryotic cells become enveloped by a membranous sporophorous vesicle, division into sporoblasts occurs by invagination of the surface in rosette formation, spores, 2.8 - 4.0 x 1.7 - 2.4 µm are ellipsoid and uninucleate, spore wall composed of a smooth membrane-like layer overlying an endospore composed of a thick electron dense layer and a very thick electron lucent layer, polar tube is isofilar with 12 or 13 coils obliquely around the single nucleus; the species causes high mortality in larvae following damage to the intestinal wall by penetration of the polar tubes; type species V. necatrix (Kramer, 1965) Pilley, 1976 in haemolymph and adipose tissue of Pseudaletia unipunctata (Lepidoptera, Noctuidae) and other Lepidoptera. 1976).

Trusted

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

biopedia

Source: BioPedia

Belongs to 0 communities

This taxon hasn't been featured in any communities yet.

Learn more about Communities

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!