Abas wittii

{{Short description|Extinct species of single-celled organism}}

{{Speciesbox

| fossil_range = Eocene-Oligocene, {{Fossil range|56|23}}

| image = Abas wittii.jpg

| image_caption = Abas wittii specimen from the Eocene North Atlantic

| genus = Abas (diatom)

| parent_authority = R.Ross & P.A.Sims, 1980

| species = wittii

| authority = (Grunow) R.Ross & P.A.Sims

}}

Abas is an extinct genus of diatoms consisting of only one known species: Abas wittii. Originally observed as a fossil genus classified with diatom spore forms under the name Syringidium.[http://www.algaebase.org M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway] accessed 21 December 2014. Abas was observed to be live from the Eocene to Oligocene epoch appearing in tropical sites.{{cite book |last1=Round |first1=F. E. |last2=Crawford |first2=R. M. |last3=Mann |first3=D. G. |title=Diatoms: Biology and Morphology of the Genera |date=4 December 2007 |publisher=Cambridge University Press |isbn=978-1-107-39313-4 |pages=270–271 |url=https://books.google.com/books?id=WUibAAAAQBAJ&pg=PA270 |access-date=14 November 2022 |language=en}}