Notch

From Foraminifera
Revision as of 13:53, 24 April 2019 by Aspadlo (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Fig. 1. Cover plate and foramenal plate in Challengerella bradyi Billman et alii from the Gulf of Aqaba. Recent. SEM graphs. A-B: dissected specimens in oblique ventral view. C: young specimen, ventral view. Note incipient umbilical pile against which the foliar walls are beginning to fuse, covering the spiral interlocular space. D: dorsal (spiral) view of adult megalospheric specimen. E: Detail showing foraminal and cover-plates. Colours corresponding to those used in the models. White arrow: loop-hole. F: general model showing position of plates and communications. Note position of loop-hole (red arrow). G: Detail of umbilical structures in last three chambers. Note the separation of streaming chamber plasm through successive foramina (blue arrow) and circulation in the umbilical interlocular space (black arrow) by the umbilical structures. Models schematic, not to scale, after Hottinger, 2000. a: aperture; cp: cover plate; csut: chamber (septal) suture; f: foramen; fo: folium; foa: foliar aperture; fp: foramenal plate; isp: interlocular (intrasepal) space; lh: loop-hole; n: notch; pil: umbilical plug; s: septum; sf: septal flap; suc: spiral umbilical interlocular space, transformed into spiral canal when covered by foliar extensions; u: umbilicus; ulch: ultimate chamber; vc: funnel (vertical canal); wsut: whorl (spiral) suture; (Hottinger, 2006; fig. 34 [1] CC/BY-NC-SA)

Definition

  • according to Hottinger (2006):

NOTCH (French: encoche) is a single indentation of the proximal chamber wall in a sutural position. It marks the limit between a spiral main chamber and its folium and may extend into an internal infold.


See also


References

Hottinger (2000), Functional morphology of benthic foraminiferal shells, envelopes of cells beyond measure. In: Lee J.J. & Hallock P. (eds.), Advances in biology of Foraminifera, Micropaleontology, New York, vol. 46, suppl. 1, p. 57-86.

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


                    | Foraminifera  |  FORAM-Links | Contributors |