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Haeckel

Pylolena armata group?

A central pyloniid shell surrounded by 3 centrifugally radiating girdles whose distal ends join forming a trigonal outline; this structure may be surrounded by supplementary growth in the form of a spherical latticed test. Diameter of fully developed shell: ca. 150 µm.

Ref.: Nigrini and Moore (1979).

Pylolena armata