Description of egg capsules of Voluta ebraea Linnaeus, 1758 (Gastropoda: Neogastropoda)
; Bigatti, Gregorio 
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12/2010
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Sociedad Malacológica del Uruguay
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Comunicaciones de la Sociedad Malacológica del Uruguay
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0037-8607
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Voluta ebraea Linnaeus, 1758 es un volútido endémico del norte y nordeste de Brasil. Ovicápsulas características de la familia Volutidae fueron encontradas adheridas al alga Udotia occidentalis en praderas de fanerógamas marinas. La morfología y tamaño de las ovicápsulas y embriones, así como la rádula y protoconcha de juveniles y adultos confirman que las puestas encontradas corresponden a V. ebraea. Las ovicápsulas son circulares y aplanadas con un diámetro medio de 18,2 mm, presentando morfología y tamaños similares a las ovicápsulas de Voluta musica, endémica de Venezuela. Las ovicápsulas presentan una apertura en el centro (por donde emergen los juveniles) y una sutura desde ésta hasta la base. En promedio eclosionaron tres juveniles por ovicápsula, con un largo promedio de 7,8 mm. Las técnicas histoquimicas realizadas demostraron que la pared de las ovicápsulas está compuesta por tres capas, conteniendo proteínas, carbohidratos y glicoproteínas. La identificación y protección de las ovicápsulas de V. ebraea encontradas en el campo podría ayudar a conservar esta especie endémica y amenazada.
Voluta ebraea Linnaeus, 1758 is an endemic volutid from north and northeast Brazil. Characteristic volutid egg capsules were found attached to the alga Udotia occidentalis in sea grass beds. Morphology and size of those egg capsules and embryos as well as protoconch and radulae of juvenile and adults confirm that all the spawns found belong to V. ebraea. Egg capsules, are circular and flattened with a mean diameter of 18.2 mm, presenting analogous morphology and size to those of Voluta musica, endemic from Venezuela. An opening through which crawling juveniles emerge is located at the center of the egg capsules with a suture from the base to the central opening. The average number of hatchlings was three and the mean shell length of juveniles 7.8 mm. Histochemical techniques showed that egg capsules wall is composed of three layers, containing protein, carbohydrates and glycoprotein. Identifying and protecting V. ebraea egg capsules in the wild could help to conserve this endemic and endangered species.
Voluta ebraea Linnaeus, 1758 is an endemic volutid from north and northeast Brazil. Characteristic volutid egg capsules were found attached to the alga Udotia occidentalis in sea grass beds. Morphology and size of those egg capsules and embryos as well as protoconch and radulae of juvenile and adults confirm that all the spawns found belong to V. ebraea. Egg capsules, are circular and flattened with a mean diameter of 18.2 mm, presenting analogous morphology and size to those of Voluta musica, endemic from Venezuela. An opening through which crawling juveniles emerge is located at the center of the egg capsules with a suture from the base to the central opening. The average number of hatchlings was three and the mean shell length of juveniles 7.8 mm. Histochemical techniques showed that egg capsules wall is composed of three layers, containing protein, carbohydrates and glycoprotein. Identifying and protecting V. ebraea egg capsules in the wild could help to conserve this endemic and endangered species.
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