Ancistrumina obtusae     (Ciliata)
Organism information awaits expert curation
Class: Oligohymenophorea

Size: Length 35.08 µm; Width 27.88 µm.

Ovoid body, and almost rounded at its posterior part. The macronucleus oval, elongated and measures 14.28 µm in length and 9.45 µm in width in average, situated always in the anterior part of the body. The micronucleus is spherical in shape and measures 1.7 - 3.4 µm in diameter. Contractile vacuole posteriorly placed. Food vacuoles of varied sizes, containing large, darkly stained bodies, are visible. The somatic cilia are 4 - 5 µm long, the adoral one 9 - 15 µm and the thigmotactic cilia are 5 - 6 µm long. The cytostome measures 3.4 - 8.5 µm in length and 5.1 - 8.5 µm in width, situated at the posterior end. Normally two long lashing cilia emerge from the extremity of the cytostome which form the end part of the membranellae with the help of adoral cilia. Kineties of the general ciliature run more or less meridionally, 19 - 22 in number, 9 - 10 on the right and 10 - 12 in the left side of the body.

Synonym (s)

Common Name (s)
Economic Importance and Threats



• West Bengal, Sagar Island INDIA

Literature Source(s)
  • Jamadar, YA and Choudhury, A (1990) Ciliates of some marine and estuarine molluscs from Indian coastal region Technical Monograph ZSI, Calcutta 12 p 79 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2012-02-02

Back to Search