CATALOG OF ORIGINAL DESCRIPTIONS: Lithatractus nuphar Clark & Campbell 1945

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 nuphar
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 nuphar

Citation: Lithatractus nuphar Clark & Campbell 1945
Rank: species
Type locality: LL598
Type specimens: pl.3, fig.3
Described on page(s) : p.19

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Current identification:

Original Description
Elliptical cortical shell very spiny and having 2 opposite, stout, polar spines of similar length (0.5 diameter of shell in length), the same form being generally conical (20°) in outline, and 3-bladed prismatic with apically sharp, peripherally thin, and basally flared, triangular blades; the by-spines (or large sepaloid thorns) arise from some of the nodes of the meshwork;. these spines are relatively long (0.6 length of polar spines), sharply pointed, basally flared, generally conical (10°), and numbering about 40 or more; concentric medullary shell similar to cortical shell in form but about 0.4 its size; pores of cortical shell relatively large, similarly circular, few (10 in the long axis), and deeply set; pores of medullary shell obscured; meshwork of cortical shell coarse, highly raised, and having short sepaloid points at every node other than those from which the longer thorns arise.

Size: Length of polar spines 50µm, of by-spines or thorns 30µm, of main axis of cortical shell 100µm, of main axis of medullary shell 40.8µm; diameter of cortical pores 10µm.

Etymology: No information given

Extra details from original publication
Distinguishing features: Lithatractus nuphar n. sp. differs from other species in small size and principally in having both thorns and

Editors' Notes
The authors here list Lithatractus nuphar under the subgeneric name Lithatractylis and include the subgeneric name in the species name.[comment from RadWorld database]


Clark, B. L. & Campbell, A. S. (1945). Radiolaria from the Kreyenhangen Formation near Los Banos, California. Geological Society of America, Memoir. 1-66. gs


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

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