S15

Polysolenia lappacea (Haeckel)

Xanthiosphaera lappacea Haeckel, 1887, p. 120, pl. 8, figs. 10, 11

Polysolenia lappacea (Haeckel) Nigrini, 1967, p. 16, pl. 1, figs. 3a, b

DESCRIPTION "Similar to Polysolenia spinosa but spines are often curved. At different distances from the shell some spines are joined by broad lateral branches which form an irregular and incomplete outer mesh." (from Nigrini, 1967).

DIMENSIONS "Diameter of shell 81-109 microns." (from Nigrini, 1967).

REMARKS

1. For a more complete synonymy see Nigrini, 1967.

Plate 2, figures 3 a, b

S16

RECENT DISTRIBUTION

1. Nigrini, 1967, fig. 4; "Indian Ocean occurrences - P. lappacea is sparsely distributed in low latitudes and is almost entirely absent from middle latitudes. Maximum abundances (6% and 10% of the described population) occur at the northern and southern limits respectively of tropical radiolarian distribution."

2. Molina-Cruz, 1975, Code S33; not used in factor analysis of southeast Pacific samples; cf. Appendix 10 for percent S33 at each station.

3. Morley, 1977 (Polysolenia spp.); cf. P. flammabunda.