M. Mulisch et al., LIFE-CYCLE AND ULTRASTRUCTURE OF LAGOTIA-MINOR DONS, 1948 (CILIOPHORA, HETEROTRICHIA) REVEALING NEW CHARACTERS FOR FOLLICULINID CLASSIFICATION, European journal of protistology, 29(2), 1993, pp. 144-154
The morphology, behavior, trophont ultrastructure, and life cycle of t
he folliculinid species, Lagotia minor, is described. Lagotia minor ha
s a simple lorica, a rounded macronucleus, broad and stiff peristomial
wings, and a deep buccal cavity. The behavior of the swarmer and its
mode of lorica secretion differ from these events in Eufolliculina and
Metafolliculina. The ultrastructural investigations reveal further di
fferences between the genera, e.g., in Lagotia minor the somatic dikin
etids are associated with a cross-striated fiber which runs along the
postciliary ribbon. The peristome of L. minor is supported from ladder
-like nemadesmata which originate from opposite sides of the wings. Ba
sed on these results and on light microscopical observations on other
folliculinid genera, new characters for folliculinid classification ar
e discussed.