Artículos de revistas
Spawn in two deep-sea volute gastropods (Neogastropoda: Volutidae) from southwestern Atlantic waters
Fecha
2017-12Registro en:
Penchaszadeh, Pablo Enrique; Teso, Silvia Valeria; Pastorino, Roberto Santiago Guido; Spawn in two deep-sea volute gastropods (Neogastropoda: Volutidae) from southwestern Atlantic waters; Pergamon-Elsevier Science Ltd; Deep Sea Research Part I: Oceanographic Research Papers; 130; 12-2017; 55-62
0967-0637
1879-0119
CONICET Digital
CONICET
Autor
Penchaszadeh, Pablo Enrique
Teso, Silvia Valeria
Pastorino, Roberto Santiago Guido
Resumen
The gastropods Odontocymbiola pescalia and Provocator corderoi and their egg capsules were collected by the R/VPuerto Deseado from the Mar del Plata Submarine Canyon (~37º53´ S, at depths of 291-1404 m) and from BurdwoodBank (~54º27´ S, 128-785 m). Odontocymbiola pescalia egg capsules measured 15.67 ± 3.38 mm in diameter. Theywere subspherical in shape with an external calcareous layer. Each egg capsule contained 3-5 embryos and whitematerial as extra embryonic food. Embryos grew to a size of up to 9.3 ± 1.1 mm in mean shell length before hatchingas crawling juveniles. The spawn of P. corderoi consisted of a single dome shaped egg capsule of 14.17 ± 1.5 mm indiameter, attached to hard substrata by a basal membrane with a rounded outline. A curved semilunar furrow (seam)on one side of the capsules was always present. The number of embryos per capsule was 2-6. Embryos hatched ascrawling juveniles with a shell length of 5.9 ± 0.6 mm. The size and number of whorls in the hatchling shell suggesteda slow rate of development, akin to many other deep-sea invertebrates. The egg capsules and reproductivedevelopment strategies of both species were compared with those from other congeneric representatives