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
Other pages this level: << < Larnacidium, Larnacilla, Larnacoma, Larnacospongus, Larnacostupa, Lentellipsis, Leptarachnium, Leptosphaera, Liosphaera, Lipmanella, Liriospyris, Lithacanthus, Lithamphora, Lithapium, Litharachnium, Lithatractus, Lithelius, Lithobotrys, Lithocampana, Lithocampe, Lithocarpium, Lithochytris, Lithocircus, Lithocorythium, Lithocubus, Lithocyclia, Lithomelissa, Lithomespilus, Lithomitra, Lithomitrella, Lithomitrissa> >>

Lithatractus birostratus Lipman 1953

not figuredLithatractus carduelis Haeckel 1887

not figuredLithatractus cirsium Haeckel 1887

not figuredLithatractus conifer Haeckel 1887

not figuredLithatractus conostylus Haeckel 1887

not figuredLithatractus convallaria Haeckel 1887

not figuredLithatractus echiniscus Haeckel 1887

Lithatractus floridus Renaudie & Lazarus 2016

Lithatractus fragilis Haeckel 1887

not figuredLithatractus gamoporus Haeckel 1887

Lithatractus hederae Clark & Campbell 1942

not figuredLithatractus hexagonalis Haeckel 1887

Lithatractus jugatus Haeckel 1887

not figuredLithatractus leptostylus Haeckel 1887

not figuredLithatractus lobatus Haeckel 1887

Lithatractus miocaenica Principi 1909

Lithatractus nucleolus Tan & Su 1982

Lithatractus nuphar Clark & Campbell 1945

not figuredLithatractus pachystylus Haeckel 1887

Lithatractus pierinae Clark & Campbell 1942
= Axoprunum pierinae
Lithatractus pterosphaerus Clark & Campbell 1942

not figuredLithatractus rosetta Haeckel 1887

Lithatractus santaeannae Campbell & Clark 1944

Lithatractus santaeannae pusillus Campbell & Clark 1944

Lithatractus timmsi Campbell & Clark 1944
= Lithatractus timmsi
Lithatractus timmsi quadrispinus Campbell & Clark 1944


Citation: Lithatractus Haeckel 1887
Rank: genus
Type species: Lithatractus fragilis Haeckel 1887 [designated by Campbell,1954, p.D72]
Described on page(s) : 319
Family (traditional): Actinommidae

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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. gs


Lithatractus compiled by the radiolaria@mikrotax project team viewed: 19-4-2021

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