1968 Pterocanium grandiporus - Nigrini p. 57, pl. 1, fig. 7
From Suzuki Paleotax db:
1968 Pterocanium grandiporus n. sp. Nigrini p. 57, pl. 1, fig. 7
1977 Pterocanium grandiporus (Nigrini) [sic] Molinap. 336, pl. 6, fig. 11
1979 Pterocanium grandiporus Nigrini Nigrini & Moore N47-48, pl. 23, fig. 5
1985 Pterocanium charybdeum grandiporus Nigrini Lazarus et al. p. 197, figs. 13.1, 13.2
1991 Pterocanium grandiporus Nigrini Takahashi p. 115, pl. 36, figs. 12, 13
1992 Pterocanium grandiporus Nigrini Nigrini & Caulet p. 146, pl. 2, figs. 6-8
2017 Pterocanium grandiporus Nigrini Chen et al. p. 210, pl. 75, figs. 10, 11
Catalog entries: Pterocanium grandiporus
Original description: Similar in size and shape to P. trilobum Nigrini (in press). but shell may be heavier and rougher, cephalic pores better defined, and apical horn usually longer. Thoracic pores larger than those of P. trilobum, 9-11 across the widest part of the segment.
Abdomen often quite well developed and attached to the feet for at least most of its length. Pores large, sub-circular, having no definite arrangement; those adjacent to the feet larger than the others. Termination always ragged.
Remarks on original description: Few in 2 samples near the coast of Central America and in 2 equatorial samples near the coast of South America. rare or absent in all other samples examined (text-figure 8).
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:
Nigrini, C. A. (1968). Radiolaria from eastern tropical Pacific sediments. Micropaleontology. 14(1): 51-63. gsReferences:

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Pterocanium grandiporus compiled by the radiolaria@mikrotax project team viewed: 22-7-2026
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