Arkhangelskiales
Edited by Paul Bown on Fri, 23/03/2012 - 11:21
Citation:
Arkhangelskiales Bown & Hampton, 1997 in Bown & Young, 1997
Diagnosis:
Tiered placoliths with 3-5 closely appressed shields. Central-area structures include transverse bars with proximal net; axial or near axial crosses with proximal net; and perforate plates crossed by axial or near axial sutures. LM images vary significantly, from predominantly dark in the Kamptneriaceae, to predominantly bright in the Arkhangelskiellaceae.
Remarks:
The Kamptneriaceae appears to have originated from loxolith coccoliths, and the tiered placolith rim structure is actually a modified loxolith construction. The earliest representatives of the family are only slightly modified loxolith coccoliths.
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Mesozoic: Arkhangelskiales
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