lorica

Description:

Codonella cratera lorica. Codonella cratera is a large tintinnid ciliate. A distinctive chitinous lorica is coated with xenosomes (foreign particles such as sand particles as in these individuals and diatoms). The posterior lorica is broadly spherical with a cylindrical anterior half. There is a prominent circumferential anterior adoral zone of membranelles. From freshwater pond near Boise, Idaho. Oblique illumination.