Foraminiferan test from Iriomote Jima, Ryukyu Islands, Japan (Baculogypsina sp.), coloured scanning electron micrograph (SEM). Foraminifera produce (most commonly) a calciferous test (skeleton) which is divided into chambers. Live forams have filopodia that are united in a complex fashion to produce reticulopodia. Known as star sand. Magnification: x8 when shortest axis printed at 25 millimetres.
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