Hi Juan,

there are many papers about cryptic polychaete species out there (search on google scholar and you will get hundreds of papers). One classic paper that comes to my mind is this one:

Gassle & Grassle (1976) Sibling species in the marine pollution indicator Capitella (Polychaeta)

Hi Juan, 

Here I sent a paper about general view of The scale of cryptogenesis. If you want to know more about cryptic species you need to read the papers of Nancy Nnowlton.

In this website you can find her papers. 

http://www.stri.si.edu/english/research/bibliography/results.php?author=Knowlton%2C+Nancy

Thank you so much Marcel!

Marcel I have seen that the pdf that you sent is a chapter of a book. What is the complete reference of the book?

HI Juan, 

In th following link, you can find the information of the book. 

http://www.waddenacademie.nl/fileadmin/inhoud/pdf/06-wadweten/Proefschriften/Thesis_Deniz_Haydar.pdf

Now, the second link you have the paper. 

http://onlinelibrary.wiley.com/doi/10.1111/j.1472-4642.2011.00863.x/pdf

Best regards

Marcel, again, thank you very much for your assitance.

Here is one that is cited much in marine biology:.

It appeared in TREE Volume 22, Issue 3, p148–155, March 2007

Cryptic species as a window on diversity and conservation

David Bickford, David J. Lohman, Navjot S. Sodhiemail, Peter K.L. Ng, Rudolf Meier, Kevin Winker, Krista K. Ingram, Indraneil Das

DOI: http://dx.doi.org/10.1016/j.tree.2006.11.004

I hope that you find it useful

Hi Bert,

Thank you very much for your advicement and help. This reference is very useful for me.

Best.

Lucas.

This publication can be downloaded from ReseacrhGate

Adams, M; Raadik, TA; Burridge, CP; Georges, A (2014) Global biodiversity assessment and hyper-cryptic species complexes: more than one species of elephant in the room? Systematic Biology 63 (4):518-533

Thanks a lot Bert!!!!