A possible chlorophycean affinity of some Neoproterozoic acritarchs

Two taxa of Neoproterozoic acritarchs of unknown affinity, Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and...

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Veröffentlicht in:Organic geochemistry 1999-01, Vol.30 (10), p.1323-1337
Hauptverfasser: Arouri, Khaled, Greenwood, Paul F, Walter, Malcolm R
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Sprache:eng
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Zusammenfassung:Two taxa of Neoproterozoic acritarchs of unknown affinity, Multifronsphaeridium pelorium and Species A, are analysed by electron microscopic (SEM, TEM) and chemical (micro-FTIR, pyrolysis GC–MS, thermal desorption–MS) methods. Both acritarch species are characterised by multi-branched processes and a remnant trilaminar sheath (TLS) structure. The TLS-bearing wall structures in these acritarchs suggest a possible biological affinity to chlorophyte algaenan. The molecular data obtained from the two acritarchs were generally similar and also consistent with a chlorophycean affinity. A significant aliphatic moiety is evident in these acritarchs as a short-chain series of n-alkene/alkane pyrolysates and prominent aliphatic IR bands. The restricted molecular-weight range (
ISSN:0146-6380
1873-5290
DOI:10.1016/S0146-6380(99)00105-9