![](http://www.alamy.com/thumbs/6/857AC95C-7D9A-4D4C-BE79-589DE9DC29BB/2T6GGNN.jpg)
Fossil horsetail (Annularia stellata) who lived in Carboniferous period. Sample.
Size: 5447px × 3522px
Photo credit: © José María Barres Manuel / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: annularia, calamitaceae, carboniferous, close-, equisetales, fossil, geology, horizontal, horstail, paleontology, sample, stellata