Foraminiferan tests. Coloured scanning electron micrograph (SEM). Foraminiferan tests from Iriomote Jima, Ryukyu Islands, Japan (Calcarina sp.). Foraminifera are marine single-celled marine protozoa that produce (most commonly) a calciferous test (skeleton) which is divided into chambers. Live foraminifera have filopodia that are united in a complex fashion to produce reticulopodia.Known as star sand when found in high concentrations. Magnification: x 6 when printed at 10cm wide.
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