CATALOG OF ORIGINAL DESCRIPTIONS: Lithatractus santaeannae pusillus 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 -> L -> Lithatractus -> Lithatractus santaeannae pusillus
Other pages this level: L. birostratus, L. carduelis, L. cirsium, L. conifer, L. conostylus, L. convallaria, L. echiniscus, L. floridus, L. fragilis, L. gamoporus, L. hederae, L. hexagonalis, L. jugatus, L. leptostylus, L. lobatus, L. miocaenica, L. nucleolus, L. nuphar, L. pachystylus, L. pierinae, L. pterosphaerus, L. rosetta, L. santaeannae, L. santaeannae pusillus, L. timmsi, L. timmsi quadrispinus

Lithatractus santaeannae pusillus

Citation: Lithatractus santaeannae pusillus Campbell & Clark 1944
Rank: sub-species
Type specimens: pl.2, figs.23-25
Type repository: [No holotype designated, slides at University of California, Museum of Paleontology]
Described on page(s) : p.19
Family (traditional): Actinommidae
Family (modern): Amphisphaeridae

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Current identification:

Original Description
Variety differs from typical form in much smaller dimensions, relatively thick wall, smaller medullary shell with small pores; and shorter, more widely conical (upward of 10°) polar spines.

Length, total, 180µm, of polar spines, 40µm (perhaps tipped). Distinguishing characters (rw): Intergrades with much larger and slightly different typical form of species. Abundant in several samples.

Editors' Notes
(Synonymized with Amphisphaera radiosa (Ehrenberg) by Petrushevskaya, 1975c, p.570]


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

Petrushevskaya, M. G. (1975a). Cenozoic radiolarians of the Antarctic, Leg 29, DSDP. Initial Reports of the Deep Sea Drilling Project. 29: 541-675. gs


Lithatractus santaeannae pusillus compiled by the radiolaria@mikrotax project team viewed: 20-4-2021

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