Thecacineta calix   (Schroder,  1907) (Ciliata)
Organism information awaits expert curation
Class: Phyllopharyngea

Magnified view of Thecacineta calix attached with Desmodora

Size: Body length 14–24 μm(47–49 μm under colonization of the copepode host); width in the middle of body 12–17 μm (22–30 μm in copepode host); macronucleus diameter 6–8 μm (13–16 μm in copepode host); length of the lorica 44–60 μm (103–164 μm in copepode host), lorica width 25–26 μm, stalk length 15–21 μm, stalk thickness 1.5–3 μm.

Marine loricate, suctorian. Cell body entirely fills the lorica and attached to their bottom. Lorica totally ribbed transversely. Apical part of body protrudes beyond lorica aperture. Up to 30 clavate tentacles with length about 90 μm arise from upper body surface. Macronucleus large, oviform, located at the bottom of the cell body. With large contractile vacuole placed in basal body part usually near macronucleus.

The suctorians were attached close to the cloaca of the nematodes. Probably because the location may be connected with mode of reproduction of thecacinetid suctorians, including Thecacineta calix, by vermigemmic budding. The swarmers (migratory stages, devoid of ciliature, vermiform and unable to swim) are formed during reproduction. These swarmers crawl onto the new host over the surfaces of the copulating hosts therefore localization of the commensals near the zone of joining of copuling nematodes may possibly give priority to epibionts for expansion.

Synonym (s)
Acineta calix Schroder, 1907
Thecacineta laophontis Jankowski, 1981
Paracineta moebiusi Kahl, 1934

Common Name (s)
Economic Importance and Threats

Habitat:  Benthic


• Andaman and Nicobar Islands, Off Nicobar Islands, Northern Seamount (Lat: 9.99) (Long: 93.95) INDIA (Record: 17/10/2007 - 01/12/2007) (Depth: -1301 mts)

Literature Source(s)
  • Ingole, B; Singh, R; Sautya, S; Dovgal, I and Chatterjee, T (2009) Report of epibiont Thecacineta calix (Ciliophora: Suctorea) on deep sea Desmodora (Nematoda) from the Andaman Sea, Indian Ocean Journal of the Marine Biological Association of the United Kingdom 2 - Biodiversity records 1-4 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Dovgal, I; Chatterjee, T & Ingole, B (2008) An overview of Suctorian ciliates (Ciliophora, Suctorea) as epibionts of halacarid mites (Acari, Halacaridae) Zootaxa Magnolia Press 1810 60–68 Available at -

Page last updated on:2012-02-10

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