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  • according to Hottinger (2006):

TECTUM - in fusulinids: a thin, dense outer (extern) layer of the spirotheca (spiral outer wall), homologous in position to an epiderm but possibly produced by a discrete shell-building process. May bear tiny, pore-like gaps permitting replication of parakeriothecal elements like chomatal pores in a superposed shell layer.

See also


Hottinger (2006), Illustrated glossary of terms used in foraminiferal research. Carnets de Géologie, Memoir 2, ISSN 1634-0744

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