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Shell large, generally conical (45°), with a greatly elongated, sinuous, vertical, rodlike apical horn (its length about three times that of a radial apophysis), tip sharp, horn forming one of remarkable, striking characters of species; cephalis relatively small, conical (50°), its apex blunted, its sides plane, and basal diameter 0.32 length of a radial apophysis; thorax subconical (40°), its length approximately 0.9 radial apophysis, its basal diameter nearly 0.75 radial apophysis, and its sides rather strongly bulged, especially toward middle, at its upper end cervical suture weak, but at thoracic base a strong, raised, circular, transverse rib cuts off thorax from abdomen below it (lumbar suture) and extends beyond latter; abdomen subcylindrical (hollow-sided), greatly damaged in all of our specimens but apparently at least as long as 0.5 radial apophysis, and with diameter somewhat less, free margin not clear; projecting from thorax, freely extending from transverse rib are three, long, thick, very strong, equidistant, clawlike radial apophyses, these curved inwardly, distally sharp, triangular in section, triangles bladelike, apophysis continued upon thorax surface trending along contour toward neck as decurrent, linelike, raised ribs; shell-wall thicker in thorax than elsewhere and in abdomen a mere basketwork; surface in optical section rough in thorax, elsewhere smooth; cephalis poreless and glass-clear, thorax with about 40 large, more or less equal, subcircular, fairly shallow, well-separated, narrowly double contoured pores with wide framework, pores of abdomen, with numerous, subcircular to squarish, unequal pores and a delicate framework.
Length, total (approximate), 470µm, of apical horn, 370µm, of shell, 150µm, of radial apophysis, 120µm; diameter, transverse rib of thorax, 90µm, of thoracic pores, 12µm, of largest abdominal pores, 24µm. Distinguishing characters (rw): Pterocorys splendens n. sp. differs from all other described species in great elongation of horn. One of most unusual of radiolarians and a distinct "find" in this Tertiary material. Nearly all specimens are rather badly injured, and our complete (nearly) figured individuals are remarkable in preservation and rare beauty.
[Campbell and Clark here list this species under the subgenus Pterocyrtydium and include the subgenus name the species name.
Campbell, A. S. & Clark, B. L. (1944a). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs Riedel, W. R. (1952). Tertiary Radiolaria in western Pacific sediments. Meddelanden fran Oceanografiska Institutet i Goteborgs (Elanders Boktryskeri Aktiebolag) Goteborg. 19: 1-22. gs
Campbell, A. S. & Clark, B. L. (1944a). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs
Riedel, W. R. (1952). Tertiary Radiolaria in western Pacific sediments. Meddelanden fran Oceanografiska Institutet i Goteborgs (Elanders Boktryskeri Aktiebolag) Goteborg. 19: 1-22. gs
Pterocorys splendens compiled by the radiolaria@mikrotax project team viewed: 14-4-2021
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