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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Caenomorpha

Caenomorpha Perty, 1852 (ref. ID; 2014)

From Kuniyasu

Class Polyhymenophora: Subclass Spirotricha: Order Heterotrichida: Suborder Armophorina (ref. ID; 2014)
Heterotrichida: Armophorina (ref. ID; 7553)

Synonym Gyrocoris Stein (ref. ID; 1618)

[ref. ID; 2014]
Medusoid shape with armour-like pellicular shield and 1 to 3 posterior spines. Without somatic cilia except for a small group at the base of a posterior spine. 1 or 2 rows of cirri located in the anterior body region cause it to move in a jerky fashion. The perizonal stripe consists of 5 ciliary rows winding around the body above the AZM on the edge of the pellicular armour. Between 1 and 4 macronuclei but always a single micronucleus. Several species recorded, mostly freshwater and all sapropelic. Most easily confused with some species of Metopus and Brachonella which always have a well-developed somatic ciliature. May also be confused with Cirranter which does not have posterior spines and with Ludio which has two very long anterior cirri.
Quote; Colin R. Curds, Michael A. Gates and David McL. Roberts "British and other freshwater ciliated protozoa Part II Ciliophora: Oligohymenophora and Polyhymenophora" Cambridge University Press, 1983 (ref. ID; 2014)
  1. Caenomorpha aculeata Wetzel, 1928 (ref. ID; 1621)
  2. Caenomorpha capucina Kahl (ref. ID; 1303, 1621)
  3. Caenomorpha corlissi (ref. ID; 7234)
  4. Caenomorpha lauterborni Kahl, 1927 (ref. ID; 1621, 4610)
    Syn; Caenomorpha parva Wetzel, 1928 (ref. ID; 4610)
  5. Caenomorpha levanderi Kahl, 1927 (ref. ID; 1621) reported year? (ref. ID; 3771)
  6. Caenomorpha levandri (ref. ID; 1303)
  7. Caenomorpha medusula Perty, 1852 (ref. ID; 1335, 1621, 2245, 4610, 7553) reported year? (ref. ID; 1219, 1618, 3698) reported author and year? (ref. ID; 191, 4429)
  8. Caenomorpha medusula var. dentata Wetzel, 1928 (ref. ID; 1621)
  9. Caenomorpha medusula var. duplex Wetzel, 1928 (ref. ID; 1621)
  10. Caenomorpha medusula var. lata Kahl, 1927 (ref. ID; 1621) reported year? (ref. ID; 4610)
  11. Caenomorpha medusula var. trinucleata (ref. ID; 1621)
  12. Caenomorpha parva Wetzel, 1928
    See; Caenomorpha lauterborni (ref. ID; 4610)
  13. Caenomorpha sapropelica Kahl, 1927 (ref. ID; 1621, 4610)
  14. Caenomorpha steini (Butschli, 1879?) (ref. ID; 1621)
  15. Caenomorpha uniserialis Levander, 1894 (ref. ID; 1621, 4610, 4788)

Caenomorpha medusula Perty, 1852 (ref. ID; 1335, 1621, 2245, 4610, 7553) reported year? (ref. ID; 1219, 1618, 3698) reported author and year? (ref. ID; 191, 4429)

Descriptions

Body medusoid with a long posterior spine; somatic ciliation restricted to 2 rows of thick flexible cirri (which are highly thigmotactic) and to the perizonal ciliary stripe; buccal cavity with the adoral zone of membranelles forms a long spiral encircling the body; cytostome situated posteriorly, cytopharynx directed anteriorly; a single undulating membrane borders the cytostome; 3 or 4 macronuclei; 1 contractile vacuole locate at the posterior extremity. (ref. ID; 1219)
Fresh and brackish water. (ref. ID; 1618)

Measurements

Length 100-150 um. (ref. ID; 1219)
150 by 130 um. (ref. ID; 1618)