Two species of recent foraminifera , i have some difficulties how can i differentiate between both of them .
Dear Ramadan,
Eggerella (not Engerella) bradyi is an agglutinated, triserial species, as you can see here: http://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=113930
Ammonia beccarii is instead a hyaline rotaliid, trochospiral. You can find it here:
http://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=112849
Have a nice 2015!
Morphological distinction of molecular types in Ammonia, towards a taxonomic revision of the worlds most commonly misidentified foraminifera.
Dear Cesare , of course what you have written about eggerella and ammonia is right but both of Ammonia and Chalengerella very similar so i asked about .
If you interested to check this genus , you can find it here
http://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=484712
Dear Ramadan,
from the original description Challengerella brady differs from Ammonia with similar shape by the imperforate cover of the spiral fissures transformed into a spiral canal in the internal whorl.
Challengerella is very similar to A. gaimardi and some authors consider them as synonyms.
Some nice images are reporetd in the Hottinger, Halicz and Reiss, Atlas published in 1993. Recent Foramnifera from the Gulf of Aqaba. Slovenska Academjia Znanosti in Utmenosty, Ljubljania.
Dear Ramadan, sorry for the misunderstanding. In the first version of your question you wrote Engerella and I guessed you meant Eggerella. Thanks to Silvia for the correct answer.
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