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Acrosphaera trepanata (Haeckel, 1887)

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Shell regular spherical, with regular circular pores of nearly equal size, at unequal distances, one to four times as broad as the bars. Eight to ten pores on the half meridian. All the pores prolonged into short cylindrical tubuli about as long as broad, armed on the external mouth with an elegant corona of twenty to thirty straight bristle-shaped, parallel teeth.
Dimensions: Diameter of the shell 0.12 to 0.14, of the pores 0.015 to 0.02; length of the tubuli 0.02.
(Haeckel) 1887











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