In my opinion, the embryoinic chambers show resemblance to different Orbitolinid genuses:
1. It has protoconch and deuteroconch and subembryonic chambers similar to Praeorbitolina sp. ( Schroeder, 1965), however in Praeorbitolina deuteroconch is not subdivided by partitions and subembryonic chambers positition are at different angles compared to attached image.
2. In Alpillina sp. (Foury, 1968, emended, Arnaud-Vanneau, 1980)
there are 3 subembryonic chambers but in the attached image only 2 are recognizable in my view.
3. In Neoiraqia sp. (Danilova, 1963), the protoconch and deuteroconch ( subdivided ) and periembryonic chambers are similar to the attached image, however shape of the chambers are different.
4. Despite different embryonic chambers compared to Neorbitolinopsis sp. (Schroeder, 1965), (except the divided deuteroconch) the tangential section and shape of chambers in the tangential section in the attached image are very similar to Neorbitolinopsis, though other Orbitolinids might have similar tangential sections.
Hopefully it may be helpful http://dx.doi.org/10.1186/s13358-021-00219-x
Dear Sanjay
Thanks, it was a really good article from Prof. Özcan about Orbitoides, but my question is about Orbitolinids.
Take care
The embryonic apparatus also looks like Mesorbitolina lotzei (Schroeder, 1964)
Embryonic apparatus ( consists of protoconch and deuteroconch with small subembryonic zone) seems like Mesorbitolina/Orbitolina (mesorbitolina).Please go through following attachment. Kindly ignore previous comment.
Dear Sanjay
Thanks for the article, it is very likely to be one of the primitive species of Mesorbitolina, I still believe it is very close to M. lotzei, yet I anticipate more answers to certify that.
with best regards
Dear Reza
Thanks for your answer.
As you can see in the attached article.
Mesorbitolina parva has an embryonic apparatus which is much more complex (with more than 2 subembryonic chambers and divided deuteroconch with more than 2 partitions) than the original image
I attached, which looks like to be a quite primitive Mesorbitolina species. If you take a look at the previous article I attached in response to Sanjay by Yazdimoghadam et al. You may agree with me that the embryonic apparatus quite resembles that of M. lotzei, but to cofirm that I expect more experts to write down their ideas.
I am very thankful for your response.
Take care
Hesam
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