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Axoprunum stauraxonium Haeckel, 1887

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Shell ellipsoidal, one and one-third times as long as broad, with smooth surface Network regular, with circular meshes four times as broad as the bars. Two polar spines three-sided pyramidal, half as long as the shell, as thick as the base as a single mesh. Four inner radial beams (lying, two in the major and two in the minor axis of the ellipsoid) very thin, at the central free ends knob-like, thickened. The distance between two opposite beams equals one-third of the minor axis and indicates probably the diameter of the lost spherical medullary shell. (Three perfect and complete specimens of the same size and shape were observed.)

Dimensions:
Major axis of the ellipsoid 0,14, minor axis 0,11; pores 0,012, bars 0,003; length of the polar spines 0,07, basa1 breadth 0,012. (Diameter of the lost medullary shell 0,03?)

Habitat:
South Atlantic, Station 338, depth 1990 fathoms.

Haeckel 1887


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