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Spawn and development of the gastropod Americominella longisetosa (Castellanos and Fernandez, 1972) (Mollusca: Buccinidae) from the Southwestern Atlantic deep sea

Citation

Penchaszadeh, PE and Pastorino, G and Martinez, MI and Miloslavich, P, Spawn and development of the gastropod Americominella longisetosa (Castellanos and Fernandez, 1972) (Mollusca: Buccinidae) from the Southwestern Atlantic deep sea, Deep-Sea Research Part I, 143 pp. 43-49. ISSN 0967-0637 (2019) [Refereed Article]

Copyright Statement

© 2018 Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.dsr.2018.11.011

Abstract

The buccinid Americominella longisetosa (Castellanos and Fernández, 1972) is widely distributed along the Southwestern Atlantic shelf where it is found at 200–1,250 m depth. A total of 38 egg capsules of this species were collected by the Argentine ship R/V Puerto Deseado from the Burdwood Bank/MPA Namuncurá surroundings (~ 54°36'S, 61°30'W at 298 m depth and 53°56'S, 61°30′W at 185 m depth). Egg capsules occur individually, not clustered in egg masses, are globose in shape, translucid, with thin walls measuring about 20 µm in thickness and having a triangular stalk on the side by which the capsule is fixed to its substrate. The substrate to which the capsules were attached was the internal matrix of the poriferan Mycale magellanica (Ridley, 1881). In each capsule, only one embryo develops from an egg of about 150 µm in diameter. The embryo develops by ingesting about 9,000 nurse eggs. In distinct egg capsules we found embryos at different stages of development indicating several spawn events. Hatching takes place as a crawling juvenile measuring about 8 mm in shell length and with 4 Ľ whorls, indicative of a long embryonic development within the capsule.

Item Details

Item Type:Refereed Article
Keywords:deep-sea, Buccinidae, egg capsules, nurse eggs, complete encapsulated development, Burdwood Bank/MPA Namuncura
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Zoology not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Miloslavich, P (Dr Patricia Miloslavich)
ID Code:137676
Year Published:2019 (online first 2018)
Web of Science® Times Cited:4
Deposited By:Ecology and Biodiversity
Deposited On:2020-02-26
Last Modified:2020-04-17
Downloads:0

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