Bio*Pedia is a repository of descriptions of organisms. Information entered here will be harvested by the Encyclopedia of Life. The material will be reviewed and if inappropriate or inaccurate, may not be included in EOL.
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Description of Acantharea:
Circumscription: One of several groups previously referred to as radiolaria;-large marine unicells with radiating axopodia and an inorganic skeleton (in the case of Acantharea composed of 10/20 spicules made of strontium sulphate). Cell with central endoplasm and peripheral ectoplasm separated by a fibrous capsular wall, outside face of cytoplasm coated with a fibrous cortex that is joined to spicules by contractile myonemes. Often with symbionts. No propulsive organelles in trophic form but may have flagellated stage and/ or amoebas and/or cysts in life cycle. Ultrastructural identity: Not well established because of difficulty of good preservation. Mitochondria with tubular cristae. Axopodia arising from unspecified sites in the cytoplasm but having an open hexagonal or larger polygonal arrays of microtubules; periplasmic cortex, axopodial details, extrusomes, and so forth. With concentric extrusomes. Mitosis involves an eccentric spindle located inside an intact nuclear envelope. Synapomorphy: Tubulocristate protists with strontium sulphate skeleton with symmetry based on 20 radial elements.
A search that checks against common names and lexical variants.
Example: A search for "Pomatomus saltator" will check presence in the tree of "Pomatomus sallatrix", "Pomatomus saltator", or "Pomatomus saltatrix".
A search that checks against common names and lexical variants and homotypic variants.
Example: A search for "Pomatomus saltator" will check presence in the tree of "Cheilodipterus saltatrix", "Gasterosteus saltatrix", "Pomatomix saltatrix", "Pomatomus sallatrix", "Pomatomus saltator", "Pomatomus saltatrix", or "Temnodon saltator".
Acantharea [1]
