Distribution of Leiosphaeridia

 

Spherical microalgae are widespread in pre-Cambrian and Paleozoic deposits. The number of reported occurrences of Leiosphaeridia significantly decreases between the Devonian and Jurassic. Species described from the Mesozoic and Tertiary are not recorded from the Proterozoic and Palaeozoic, and vice versa.

I rewieved twentyone species of Leiosphaeridia described from post-Palaeozoic deposits. Five of them were considered as conspecific with other Leiosphaeridia-species, two were not validly published, and five were attributable to other genera.

Geographic and stratigraphic distribution of Mesozoic and Tertiary Leiosphaeridia is tabulated in my article Lindgren 1982.

Mesozoic and Tertiary Leiosphaeridia

Attributed to the genus Leiosphaeridia:

L. aptiana
L. nelliae
L. ? ovata
L. plicata
L. pusilla
L. sarjeantii
L. similis
L. trematophora
L. variabilis

Conspecific with other Leiosphaeridia-species:

L. deflandrei
L. granulosa
L. minutaespinosa
L. ralla
L. tangentensis

Not validly published:

L. caperata
L. taxodiforma

Attributable to genera other than Leiosphaeridia:

L. asymmetrica
L. eisenackii
L. ? scrobiculata
L. spongiosa
L. staplinii

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Morphology and taxonomy
Botanical affinities
Diagnostic features in modern algae
Morphometry of modern and fossil algae
Genus Leiosphaeridia
   

References

Lindgren, S., 1981.
Remarks on the taxonomy, botanical affinities, and distribution of leiospheres. (Summary in Russian) Stockholm Contrib. Geol., 38(1): 1—20. Stockholm. ISBN 91-22-00500-5. ISSN 0585-3532. — Buy at the lowest prices among books in Sweden.
Lindgren, S., 1982.
Taxonomic review of Leiosphaeridia from the Mesozoic and Tertiary. Stockholm Contrib. Geol., 38 (2): 21—33. Stockholm. ISBN 91-22-00502-1. ISSN 0585-3532. — Buy at the lowest prices among books in Sweden.
Lindgren, S., 1982.
A new taxon of Leiosphaeridia (algae) from Upper Cretaceous clays, southern Sweden. Stockholm Contrib. Geol., 37 (11): 139—143. Stockholm. ISBN 91-22-00487-4. ISSN 0585-3532.
Lindgren, S., 1984.
A new taxon of Leiosphaeridia (algae) from Upper Cretaceous clays, southern Sweden. Stockholm Contrib. Geol., 39 (5): 139—144. Stockholm. ISBN 91-22-00517-x. ISSN 0585-3532. — Buy at the lowest prices among books in Sweden.

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One Response to Distribution of Leiosphaeridia

  1. […] FORWARD TO Morphology and taxonomy Botanical affinities Diagnostic features in modern algae Morphometry of modern and fossil algae Genus Leiosphaeridia Distribution of Leiosphaeridia […]

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