Myxobolus chinsurahensis     (Protozoan)
Organism information awaits expert curation
Class: Myxosporea

Plasmodia: Yellowish kidney shaped, attached with the scales of infested host fishes. There are 59-73 µ long and 29- 41 µ wide.
Spores: Mature histozoic spores are 8.4 ± 0.43 (8.0-9.7) x 5.4 ± 0.29 (5.1-6.1), creamy white to yellowish in color, tear shaped in valvular view with rounded posterior and bluntly pointed anterior ends, although a few spores show a slightly pyriform shape in valvular view. In sutural view the spores are lenticular with prominent sutural ridge and line. The shell valves are moderately thick, uniform, without any arietal fold or markings. There lies a prominent but very small intercapsular ridge. Polar capsules are two in number, equal in size and pyriform with greatly rounded posterior and sharply pointed anterior ends converging closely but open side by side. These are 4.4 ± 0.74 (3.9-6.6) long and 2.1 ± 0.16 (1.8-2.5) wide. Five to six tight coils are formed inside each polar capsule. Polar filaments are thin and extrude through the anterior bluntly pointed end of the spores in extremely rare cases. Granular homogenous mass of sporoplasm fills the extracapsular space of the spore cavity and contains two sporoplasmic nuclei of 0.6 ± 0.13 (0.5-0.9) diameters. Spores lack any mucus envelope around as well as the iodinophilous vacuole within their sporoplasm.
Spore index:
LS: WS = 1: 0.643
LP: WP = 1: 0.477
LS: LP = 1: 0.524
WS: WP = 1: 0.389
Intraspecific variability: Some spores have a pyriform shape with slightly elongated anterior necks. The polar capsules are, accordingly, have a rather elongated pyriform shape. In a few instances sporoplasmic distribution is limited just to the posterior part of the polar capsules and not throughout the extracapsular space of the spore cavity.

Type host: Anabas testudineus (fish).
Prevalence and intensity of infection: 43/279 (15.41 %)

Remarks: All measurements are presented in micrometers as mean ± SD followed in parentheses by the range.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• West Bengal, Chinsurah INDIA (Record: 2003)

Literature Source(s)
  • Basu, S and Haldar, DP (2003) Three new species of Myxobolus Butschli, 1882 from different food fishes of West Bengal, India Acta Protozoologica 42 245 - 251 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2009-11-20

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