Axial section

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Fig. 1. Sections of Involutina liassica (Jones). Middle Lias, from Arzo, Ticino, Southern Switzerland. Transparent light micrographs. Involutina exhibits a lamellar-perforate, planispiral-evolute, dimorphic shell with a spherical megalosphere followed by a tubular chamber cavity without septa. Lateral walls ornamented by protuberant piles between coarse pores. Double arrow: shell axis. a: axial section; e: equatorial section; o: oblique section; oc: oblique-centered section; ta: tangential section; tr: transverse section; (Hottinger, 2006; fig. 15)[1] CC/BY-NC-SA)


  • according to Hottinger (2006):

AXIAL SECTION - a slice bisecting the test in a plane coinciding with the axis of coiling and intersecting the proloculus.

See also


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

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