Dear Fish friends,

As I can see the monophyly of the euteleosts  remains unclear, an debated,
there are no shared characters to all members, no matter some authors
mentioned adipose fin, breeding tubercles and contact organ.  I would like
to understand well the last tow features, they donīt have for me an
convincent definition on spanish icththyolgy books, can someone help me to
undersant the morphology and function of this structures that in spanish
literature remain unclear or just not mentioned.

Thanks for comments.

Marcela Grijalba Bendeck
Facultad de Biologia Marina
Universidad Jorge Tadeo Lozano
Colombia

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