 fragilis Haeckel 1887.jpg)
 hederae Clark and Campbell 1942.jpg)
 nuphar Clark and Campbell 1945.jpg)
 pierinae Clark and Campbell 1942.jpg)
= Axoprunum pierinae
 pterosphaerus Clark and Campbell 1942.jpg)
 santaeannae Campbell and Clark 1944.jpg)
 santaeannae pusillus Campbell and Clark 1944.jpg)
 timmsi Campbell and Clark 1944.jpg)
= Lithatractus timmsi
 timmsi quadrispinus Campbell and Clark 1944.jpg)
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.
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Current identification/main database link: Lithatractus Haeckel 1887
Original Description
Druppulida with simple ellipsoidal cortical shell and simple medullary shell, with two large opposite polar spines in the main axis of equal size and similar form.
Etymology: From the Greek lithos = stone, and atractos = spindle of silex
Extra details from original publication
The genus Lithatractus, rich in common and widely distributed species, begins the series of those Druppulida which are characterised by peculiar polar spines at both poles of the main axis. It repeats the formation of Stylosphaera and Ellipsostylus, and differs from the former in the ellipsoidal form of the cortical shell, from the latter in the possession of a medullary shell. Formerly all these forms were united in the one genus Stylosphaera (see above, p. 121).
[Synonymized with Amphisphaera by Petrushevskaya, 1975c, p.570]
Sub-genera described:
Haeckel, E (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the year 1873-1876, Zoology. 18: 1-1803. gsReferences:
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Lithatractus compiled by the radiolaria@mikrotax project team viewed: 3-3-2021
Short stable page link: https://mikrotax.org/radiolaria/index.php?id=253451 Go to Archive.is to create a permanent copy of this page - citation notes |