radiolaria - rads_cat - Prunopyle titan radiolaria - rads_cat - Prunopyle titan

CATALOG OF ORIGINAL DESCRIPTIONS: Prunopyle titan Campbell & Clark 1944

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: rads_cat -> P -> Prunopyle -> Prunopyle titan
Other pages this level: P. adelostoma, P. antarctica, P. burbachii, P. buspinigerum, P. craticulata, P. frakesi, P. haackei, P. hayesi, P. longiseta, P. monocyrtis, P. occidentalis, P. ovata, P. petrosa, P. prunoides, P. pyriformis, P. semoni, P. solida, P. tetrapila, P. titan, P. trypopyrena, P. waltheri

Prunopyle titan

Citation: Prunopyle titan Campbell & Clark 1944
Taxonomic rank: species
Described on page(s) : p.20
Type specimens: pl.3, figs.1-3
Type repository: No holotype designated, slides at University of California, Museum of Paleontology
Family (traditional): Litheliidae
Family (modern): Litheliidae

Current identification/main database link: Prunopyle titan Campbell & Clark 1944


Original Description

Shell generally ovate, large, with distinct osculum; egg-shaped shell stoutly proportioned (1.5-1.6 times its maximum diameter in length), with evenly contoured walls which round off at unmodified apical end and which end antapically at extended osculum; osculum subtubular, very short (less that, 0.1 total length in length and 0.2 greatest diameter in diameter), with about 16 projecting, slightly incurved spines around its margin and acting as stays; wall fairly thick; surface smooth; pores of shell very closely set, small (less than 4.4µm), circular, at inner ends of tubules connecting with surface, tubules mostly directed apically, pores on osculum similar but set farther apart, and not deep-set.

Size:
Length, 280µm, of tubular osculum, 40µm.

Etymology:
No infrormation given

Extra details from original publication
Distinguishing characters: Prunopyle titan n. sp. differs from Eocene species occidentalis (1942) in shape and in prominence and character of osculum. Two species not closely related, and neither has an inner concentric medullary shell.
Presence of several different sizes of individuals among specimens examined in this Miocene material suggests strong influence of temperature upon shell formation. As with other pelagic protozoans, notably loricate ciliates, this accounts for presence of many dwarfed individuals among species otherwise large in size. These small individuals are thus probably not result of unusual water conditions or other adverse factors in environment but rather follow perhaps normal temperature changes in medium. That these small individuals are younger than larger individuals is hardly possible as these shells appear to lack intussusceptional growth. Both large and small individuals occur side by side but may have been formed at different times.

References:

Campbell, A. S. & Clark, B. L. (1944). Miocene radiolarian faunas from southern California. Geological Society of America, Special Papers. 51: 1-76. gs


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Prunopyle titan compiled by the radiolaria@mikrotax project team viewed: 8-2-2026

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