Raabella helensis   Chatton & Lwoff,  1950 (Ciliata)
Organism information awaits expert curation
Class: Phyllopharyngea

Size: Length 29.89 µm; Width 15.86 µm

Body is pyriform in shape, pointed anteriorly and rounded posteriorly. The anterior end bears suctorial tentacle for the attachment to the body of the host. The ovoid or spherical macronucleus is situated nearly at the centre of the body and measures 8.64 µm in length and 6.30 µm in width. The micronucleus is also spherical and measures 2.55 µm in diameter and is placed anterior to the macronucleus. A solitary spherical contractile vacuole is also located in the vicinity of the macronucleus. The cilia are restricted only at the anterior half of the body and measure between 3.4 - 5.1 µm in length.

Synonym (s)
Hypocomides mytili Chatton and Lwoff, 1922
Hypocomides mytili Raabe, 1938
Hypocomides mytili Kozloff, 1946

Common Name (s)
Economic Importance and Threats



• Andhra Pradesh, Kakinada Bay (Lat: 17) (Long: 82.33) INDIA
• West Bengal, Hugli Estuary 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
  • Nandi, NC; Das, AK and Sarkar, NC (1993) Protozoa fauna of Sundarban mangrove ecosystem Records of the Zoological Survey of India 93(1-2) 83-101 Available at - NCL, Pune
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2012-02-13

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