Hall, Richard P. Formerly, University of California, Los Angeles, California.
- Additional Readings
An order of Granuloreticulosia in which the naked amebas form branched, threadlike, interconnected pseudopodia (reticulopodia). Species are known from freshwater, salt water, and brackish water. General characteristics of the order Athalamida are difficult to select, and the order may lack the taxonomic stability to survive accumulation of more adequate information. Heterogeneity may extend even to a genus; described species of Biomyxa differ appreciably in morphology and exhibit, for example, uninucleate and multinucleate conditions in different species (although these may represent young and mature stages in life cycles). The granular cytoplasm in Biomyxa (see illus. a) shows no clear separation into ectoplasm and endoplasm. In addition to Biomyxa, the genera Arachnula (see illus. b), Gymnophrys, and Pontomyxa have been assigned to this order. See also: Ameba; Protozoa; Rhizopodea; Sarcodina
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