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Cyclidium citrullus Cohn, a Ciliate from the Hot Springs of Tiberias (Israel)
Author(s) -
KAHAN DAVID
Publication year - 1972
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1972.tb03536.x
Subject(s) - ciliate , hot spring , biology , composition (language) , thermophile , taxonomy (biology) , ecology , botany , zoology , bacteria , paleontology , art , literature
SYNOPSIS A thermophilic ciliate Cyclidium citrullus (Hymenostomatida) was collected from Tiberias hot springs at temperatures of 50–58 C. In the laboratory, the ciliates were grown in monoxenic cultures with Escherichia coli in a mineral medium of 3% (w/v) salts similar in composition to that of the hot springs. C. citrullus tolerates a wide range of temperatures, 18–47 C. The optimal temperature is ∼44 C. The ciliates could tolerate direct transfer to salt concentrations of 0.2–7.0% (hot springs composition). No cysts or other dormant forms have been observed. A description of the ciliate based on living and stained specimens is given. The taxonomy and ecology of Cyclidium from hot springs is discussed.