Erroneous identifi cation of the mussel, Mytilus galloprovincialis RESUMENEsta comunicación informa que la presencia de Mytilus chilensis (Hupe 1854) citada en la literatura científi ca para la costa de la Bahía de Concepción (Chile) no es correcta, siendo Mytilus galloprovincialis (Lamarck 1819) la identifi cación taxonómica válida.

Abstract.-The effect of serotonin spawning stimulating agent, was evaluated in Ensis macha sexually mature broodstock, conditioned in laboratory. Neurotransmitter 0.9 ml at a concentration of 10 -5 M was injected into the foot of each specimen. 5-HT induced gamete release in 92% of injected broodstock, always producing the fastest response in males, removing sperm at 36 min (± 15.9) after injection. The release of mature oocytes began at 170 min (± 42.4) post-injection. Embryonic development to the veliger larva formation, straight hinge D had a survival of 88%, no malformations have been observed in larvae. In only one trial, fertilized oocytes were not viable. Finally, we can confirm that there is a pattern in the release of mature gametes E. macha broodstocks due to the action of serotonin 5-HT and could be a useful tool for aquaculture pr actices.