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Tetracorethra tetracorethra (Haeckel, 1887)

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Tetraspyris (Tetracorethra) tetracorethra, n. sp. Haeckel 1887 p. 1044 Pl. 53, figs. 19, 20

Tetracorethra mirabilis, Haeckel, 1881, Prodromus, p. 429, and Atlas, loc. cit.

Shell campanulate, tuberculate, with deep sagittal stricture and irregular polygonal pores; two pairs of larger pores at the flattened occipital face (fig. 20). Basal plate with four large collar pores. Apical horn very long, thirty to forty times as long as the shell, slender three-sided prismatic, straight, at the distal end irregularly branched, besom-shaped. Four basal feet half as thick as the horn, eight to twelve times as long as the shell, bristle-shaped, irregularly curved and branched, divergent, at the distal end besom-shaped. Central capsule very large; the enclosed small campanulate part sends out through the four collar pores four very long club-shaped basal lobes, half as long as the feet; each lobe contains a large oil-globule (fig. 19).

Shell 0.036 diameter; horn 1 to 1.5 mm long, feet 0.3 to 0.4 long.

Central Pacific, Station 270, surface.

Haeckel 1887











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