- Type images:
type material: S. conithorax
From Suzuki Paleotax db:
1965 Saccospyris conithorax n. sp. Petrushevskaya p. 98-99, text-fig. 11
1967 Saccospyris conithorax Petrushevskaya Petrushevskaya p. 152-153, text-fig. 85.1
1970 Saccospyris conithorax Petrushevskaya Nigrini p. 172, pl. 4, fig. 12
1971 Botryocampe conythorax (Petrushevskaya) [sic] Petrushevskaya pl. 79, fig. 4
1975 Botryocampe conithorax (Petrushevskaya) group Petrushevskaya p. 588, pl. 13, fig. 27
1975 Saccospyris conithorax Petrushevskaya Petrushevskaya pl. 1, fig. 6
1976 Lithobotrys cf. conithorax (Petrushevskaya) Petrushevskaya pl. 2, figs. e, f
1976 Lithobotrys conithorax (Petrushevskaya) Petrushevskaya pl. 2, fig. g
1977 Saccospyris conithorax Petrushevskaya Petrushevskaya fig. 1.l
1980 Saccospyris conithorax Petrushevskaya Johnson & Nigrini p. 139, text-fig. 15b, pl. 4, fig. 12
1982 Botryocampe conithorax (Petrushevskaya) Nakaseko & Nishimura p. 96, pl. 64, figs. 14, 15
Catalog entries: Saccospyris conithorax
type material: S. conithoraxOriginal description: S. conithorax differs from the preceding species [S. antarctica] by a nearly ellipsoidal shell with thinner walls. Small crests, or protuberances, and other ornamentations are sometimes observed on the surface of the upper part of the second segment, but they do not exist on the other parts of the shell which is smooth. The cephalic and ante-cephalic chambers have nearly the same dimensions, but the ante-cephalic chamber is sometimes larger than the cephalic. The post-cephalic chamber is not so much developed and not so distinct from the second segment of the shell. The different elements of the internal skeleton are usually more visible than in S. antarctica. The shell wall is thinner and smoother.
In adults, the second segment is often closed with, either an elongated and conical basis (fig.11, I, II), either an almost flat basis (fig.11, III and VI). Between these two morphologies, different transitional structures can be observed (fig.11, IV). We consider that the conical shape is more typical. On the lower part of the second segment are distributed the larger pores, sometimes in transversal rows (fig.11, I). At the very end of the shell, there is, usually, a large pore (fig.11, VI).
Remarks on original description: Frequent in Antarctic sediments, but it is, for the moment, difficult to precise if this form is restricted to this area. Not observed in tropical and sub-tropical areas. W.R. Riedel (1958) has reported shells similar to his Saccospyris (= Botryopyle) antarctica from the northern Pacific Ocean, but he did not give any description or illustration of them. As far as we know the radiolarians of this area (Kruglikova’s collections); we consider that no typical representatives of S. antarctica can be found. Some forms similar to representatives of S. conithorax with a flattened basal second segment can be observed (fig.11, VI).
Geological Range:
Last occurrence (top): Extant. Data source: Lazarus et al. 2015 - "R age group"
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Lazarus et al. 2015 - "R age group"
Plot of occurrence data:
References:
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Saccospyris conithorax compiled by the radiolaria@mikrotax project team viewed: 19-11-2025
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