S9

Otosphaera polymorpha Haeckel

Otosphaera polymorpha Haeckel, 1887, p. 116, pl. 7, fig. 6; Nigrini, 1967, p. 23, pl. 1, fig. 8

DESCRIPTION "Shell smooth, thin-walled, subspherical, with numerous very small pores, much smaller than the bars. Tubules, 2-5, with rather larger pores, are truncated obliquely, one side prolonged into a prominent acute tooth. Length of tubules, including tooth, 0.25-0.3 shell diameter." (from Nigrini, 1967).

DIMENSIONS "Diameter of shell 100-146mu. Maximum length of tubules (including tooth) 18-45mu; their maximum breadth 27-36mu." (from Nigrini, 1967).

Plate 1, figure 5

S10 Otosphaera polymorpha Haeckel

RECENT DISTRIBUTION

1. Nigrini, 1967, fig. 9; "Indian Ocean occurrences - O. polymorpha is very sparsely distributed in low latitudes, never forming more than 1 percent of the described population, and is practically absent from middle latitude samples."

2. Molina-Cruz, 1975, Code S39A; counted together with O. auriculata, but too rare for use in factor analysis of southeast Pacific sediments) cf. Appendix 10 for percent S39A at each station.