Novel mode of postembryonic development in <em>Ammothea</em> genus (Pycnogonida: Ammotheidae) from Antarctic waters

Esperanza Cano; Pablo J. López-González

doi:10.3989/scimar.2009.73n3541

Autores/as

Esperanza Cano Facultad de Biología, Universidad de Sevilla
Pablo J. López-González Facultad de Biología, Universidad de Sevilla

DOI:

https://doi.org/10.3989/scimar.2009.73n3541

Palabras clave:

Pycnogonida, Ammotheidae, Ammothea, desarrollo postembrionario, protonymphon

Resumen

En este trabajo se describe el desarrollo postembrionario de Ammothea glacialis (familia Ammotheidae). El material estudiado fue recolectado durante el crucero Itálica XIX a Tierra Victoria, en el mar de Ross, Antártida. Se describe e ilustra la morfología externa de tres estadios larvarios. El desarrollo de A. glacialis se caracteriza por: (1) la larva eclosiona como protonymphon; (2) la larva es de tamaño relativo grande (0.7 mm de longitud) y con reservas de vitelo; (3) la larva permanece en los ovígeros del macho durante varias mudas; (4) la larva presenta los apéndices larvarios II y III reducidos y el “spinning apparatus” está ausente; (5) el desarrollo de las patas es secuencial. Este desarrollo es comparado con otros desarrollos postembrionarios previamente conocidos, especialmente con los de Propallene longiceps and Nymphon grossipes.

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Citas

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