Development of the hectocotylus in <i>Illex coindetii</i> (Verany 1837) (Cephalopoda: Ommastrephidae)

Fulvio Zecchini; Michael Vecchione; Paola Belcari; Clyde F.E. Roper

doi:10.3989/scimar.03305.07D

Autores/as

Fulvio Zecchini Consorzio Interuniversitario Nazionale La Chimica per l’Ambiente
Michael Vecchione National Marine Fisheries Service, Systematics Laboratory, National Museum of Natural History
Paola Belcari Dipartimento di Scienze dell’Uomo e dell’Ambiente
Clyde F.E. Roper Department of Invertebrate Zoology, Museum of Natural History, Smithsonian Institution

DOI:

https://doi.org/10.3989/scimar.03305.07D

Palabras clave:

calamar, desarrollo, madurez, modificación del brazo, identificación, carácter taxonómico

Resumen

Las especies del género Illex (Familia Ommastrephidae) se distinguen morfológicamente principalmente por las diferencias en el hectocotylus, el brazo modificado que los machos de muchas especies de cefalópodos utiliza para transferir espermatóforos a las hembras durante el apareamiento. Hemos examinado los detalles del desarrollo de la hectocotylus en Illex, coindetii la especie de calamar Illex con el brazo hectocotylizado más altamente modificado, porque podría haber una ontogenia que pasa a través de etapas que son similares a los menos modificados hectocotyli de simpátricas I. illecebrosus y I. oxygonius. El desarrollo de las modificaciones de uno de los brazos ventrales es esencialmente sincrónico en todas las partes. El hectocotylus de I. coindetii es por lo tanto morfológicamente distintivo, incluso en estados de madurez temprana y por lo tanto no debe ser fácilmente confundida con la de sus congéneres simpátricas.

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