Direct development in the intertidal South American shell-less Onchidella marginata (Couthouy in Gould, 1852) (Gastropoda: Heterobranchia: Onchidiidae)

• Published in: Molluscan Research
• Main Authors: Dalton, María Cecilia, Penchaszadeh, Pablo Enrique
• Format: Article in Journal/Newspaper
• Language: English
• Published: Magnolia Press
• Subjects: Reproduction; Tierra del Fuego; rocky shore; egg mass; hatchlings; ecology; https://purl.org/becyt/ford/1.6; https://purl.org/becyt/ford/1; Antarctic; New Zealand; Argentino; Argentina; Pablo; Antarc*
• Online Access: http://hdl.handle.net/11336/121534

This work shows evidence of complete encapsulated development of Onchidella marginata forthe first time in South America. Recent common ancestry was suggested for geographicallyseparated New Zealand sub-Antarctic and South American populations of Onchidella. Thiscould be explained as driven by passive rafting mediated by circumpolar ocean currents. Insamples from mussel- and algal-beds in intertidal rocky shores from the southern tip ofSouth America (Tierra del Fuego Island, Argentina) we found both adults and egg masses,and crawling hatchlings were observed. Fil: Dalton, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Fil: Penchaszadeh, Pablo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina