Gloeocapsomorpha prisca

Outstanding concentrations of n-Ci, n-Cn, and n-Ci in early Paleozoic rocks Gloeocapsomorpha prisca, marine phytoplankton of uncertain affinity, probably an alga identified in Cambrian-Devonian sediments but most prominent in Ordovician. Estonian kukersite is a typical source. Blokker et al. (2001) and Powler (1992)... 

Hoffmann C. F., Foster C. B., Powell T. G., and Summons R. E. (1987) Hydrocarbon biomarkers from Ordovician sediments and the fossil alga Gloeocapsomorpha prisca Zalessky 1917. Geochim. Cosmochim. Acta 51, 2681-2697. 

Fig. 5.25 N-alkylresorcinol unit and partial structure for the algaenan of Gloeocapsomorpha prisca in kukersites (after Blokker et al. 2001).

Blokker P., van Bergen P, Pancost R., Collinson M.E., de Leeuw J.W., Sinninghe Damste J.S. (2001) The chemical structure of Gloeocapsomorpha prisca microfossils Implications for their origin. Geochim. Cosmochim. Acta 65, 885-900. 

DouglasA.G., Sinninghe DamsteJ.S., Fowler M.G., Eglinton T.I., de Leeuw J.W. (1991) Unique distributions of hydrocarbons and sulphur compounds released by flash pyrolysis from the fossilised alga Gloeocapsomorpha prisca., a major... 

Figure 8. Molecular isotopic data from Late Ordovician epicontinental marine deposits in the U.S. mid-continent. Inputs from Gloeocapsomorpha prisca are presented by decyl-2-methylbenzene and inputs from other algae are recorded by C28 n-alkanes. Cn n-alkane and phytane, like the bulk organic carbon, reflect mixed contributions from both somces. [Used by permission of the editor of Geology, from Pancost et al. (1999), Fig. 3]...

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