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All Biocode files are based on field identifications to the best of the researcher’s ability at the time.
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All Biocode files are based on field identifications to the best of the researcher’s ability at the time.
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A colonial spumellarian radiolarian (Collosphaera sp.) composed of numerous central capsules (purple porous spheres) connected to one another by cytoplasmic strands and enclosed in a clear gelatinous sheath secreted by the radiolarian cytoplasm.
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Acrosphaera (ack-row-sphere-a) spinosa, spherical colonial radiolarian. This is an example of one of the four types of large amoebae which commonly occur in the marine water colum. Dark ground image by N. R. Swanberg.
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Section of cell with central capsule, associated black pigment, central nucleus, and calymma. Inset is an endoplasmic vacuole.
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Each shell contains numerous large granules
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Haeckels fiugure legend reads .... a small piece of the surface of a living coenobium, seen from the surface. Only four individuals are visible, the central capsule of which contains numerous small nuclei and a central oil-globule. The including spherical lattice-shell is provided with a few (one to four) larger apertures, which are prolonged into short cylindrical tubules. Through these latter radiate bundles of fine pseudopodia, branching and anastomosing, and forming a fine sarcode network between the alveoles of the calymma. On the surface of the alveolated jelly-sphere the pseudopodia form a dense radiating zone. Xanthella or yellow cells are everywhere scattered.
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The entire spherical coenobium. The shells of the colony bear a variable number of fenestrated radial tubes and are densely crowded in the jelly-sphere of the calymma, the cortical zone of which is radially striped.
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Haeckels figure legend reads: A small coenobium or colony in the state of alveolation, forming a jelly-sphere, composed of a great number of capsulated individuals, densely aggregated. Each central capsule contains an oil-globule, and is enclosed by a spherical lattice-shell, which bears a few (one to four) short cylindrical tubules. Each shell is again enveloped by a membranous polyhedral alveole and separated from it by structureless jelly. The thick cortical jelly-envelope, which surrounds the whole spherical colony, exhibits a fine radial striation, produced by radiating pseudopodia; many xanthella or yellow cells are scattered in the calymma.
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