MACNBR 00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A new Scaphander species from the deep sea of Argentina
Autor/es:
JUSTINE SIEGWALD; MANUEL ANTÓNIO E. MALAQUIAS; PASTORINO, G.; TROND OSKARS
Lugar:
Londres
Reunión:
Encuentro; Molluscan Forum 2018 20th Anniversary; 2018
Institución organizadora:
THE MALACOLOGICAL SOCIETY OF LONDON THE NATURAL HISTORY MUSEUM, LONDON
Resumen:
Scaphander Montfort, 1810 is a genus of deep-seasoft-bottom gastropods composed of approximately18 species distributed worldwide. Eilertsen andMalaquias (2013) revised the systematics of the genusin the Atlantic, and recognized eight valid species.The present study describes a new Scaphander speciesfrom novel samples obtained from the abyssal plainsoff Argentina, using morphological and moleculardata. Shells, gizzard plates, radulae, and malereproductive systems were studied by optical andscanning electron microscopy, and compared withdata from all other known Scaphander species. Bayesianmolecular phylogenetics based on two mitochondrial(cythocrome c oxidase sub-unit I and 16S rRNA) andone nuclear (28S rRNA) genes together with themolecular species delimitation method AutomaticBarcode Gap Discovery were used to compare thenovel samples with all known Atlantic species. Ourresults revealed that the Argentian specimens havea distinct shell and penial papilla and molecularlywere 13.1?13.9% distinct (COI uncorrectedp-distance) from their closest relative, the northernamphi-Atlantic species Scaphander punctostriatus.
