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Minylitha convallis

Edited by Lyndsey on Thu, 10/03/2011 - 13:34

Minylitha convallis Bukry 1973

Description: Plate-like rhomboidal nannoliths, with a raised rim on both sides. Acts as a single crystallographic unit with the optic axis nearly perpendicular to the plate.

Remarks: In plan view M. convallis shows only low birefringence and is easily overlooked. The dog-bone like side view, first described by Theodoridis (1984), is more distinctive and makes identification unambiguous.

The affinities of this species are unknown, but since it is formed of a single crystallographic unit it may be related to the Triquethrhabdulaceae.

Original description:

Minylitha convallis 030005.jpgMinylitha convallis 030006.jpg

6-29convallis.JPG6-28convallis.JPG

Size: 4-8 microns long, usually 4-6 microns.

Geological Time Data
Geological Time Periods: 
NN11a
NN9
Biblio Reference: 
Young, JR.  1998.  Neogene. Calcareous nannofossil biostratigraphy. :225-265.
Notes on occurrence information: 
A more precise beginning of this species range is mid NN9. This species is often abundant but distribution is rather sporadic.

Comments

Wed, 09/03/2011 - 13:39 — mstyzen
mstyzen's picture

3 views

in addition to the perspectives addressed above there is another common view which you can encounter, that ie a Y shape. When I'm training people to look for this species I talk about the I the Y and the pie!

Wed, 09/03/2011 - 18:42 — Jeremy Young
Jeremy Young's picture

where's the y?

<p>by the Y view do you mean the ones in the lower images of image 6-29 (LM image with side views)?

Wed, 09/03/2011 - 18:47 — mstyzen
mstyzen's picture

Yes, but often it is more

Yes, but often it is more pronounced than what is illustrated in those photos.

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