Cucumariidae (Echinodermata: Holothuroidea) is a family of sea cucumbers known for displaying different reproductive strategies, including brooding and hermaphroditism. These reproductive strategies of marine invertebrates are a key feature, since it is strongly related to evolutionary and ecological aspects. According to the place in which offsprings are grown, brooding can be classified in six groups, underneath the ventral sole, among tentacles, brood pouches, dorsal pockets, perivisceral coelom and in the ovary. The last two groups are restricted to a few studied cucumariids, with only one previous report for the southwestern Atlantic Ocean. Specimens of Pentactella perrieri along its known distribution (including Burdwood Bank/MPA Namuncurá and Subantarctic area) were analyzed, using morphological observations of the internal and external features. We found for the first time, that P. perrieri is a hermaphroditic species identified as a brooder. We found between 7 up to 11 brooded individuals, of up to 3 mm length, inside of 2 thin spherical and transparent brood-sacs, with a ventral external opening. Oocytes up to 1600 µm were found in May, being the largest known for the family. It was also the month with the largest mean oocytes size (778.38 ± 611.40 µm, N = 2). This research contributes to the study of the many different reproductive strategies that marine invertebrates can adopt.

中文翻译：

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海参 Pentactella perrieri (Ekman, 1927) (Holothuroidea: Cucumariidae) 的繁殖特征：来自大西洋西南部的雌雄同体育雏物种

黄瓜科（Echinodermata：Holothuroidea）是海参的一个家族，以表现出不同的繁殖策略而闻名，包括育雏和雌雄同体。海洋无脊椎动物的这些繁殖策略是一个关键特征，因为它与进化和生态方面密切相关。根据后代生长的地方，育雏可分为六组，在腹底下，在触手、育窝、背袋、内脏周围体腔和卵巢中。最后两组仅限于少数研究过的葫芦科动物，之前只有一份关于西南大西洋的报告。Pentactella perrieri 沿其已知分布（包括 Burdwood Bank/MPA Namuncurá 和亚南极地区）的标本进行了分析，使用内部和外部特征的形态学观察。我们第一次发现 P. perrieri 是一种雌雄同体的物种，被确定为育雏器。我们发现了 7 到 11 只育雏个体，长达 3 毫米，在 2 个薄的球形透明育卵囊内，有一个腹外侧开口。5 月份发现了长达 1600 µm 的卵母细胞，是该家族已知的最大的卵母细胞。这也是平均卵母细胞大小最大的月份 (778.38 ± 611.40 µm, N = 2)。这项研究有助于研究海洋无脊椎动物可以采用的许多不同的繁殖策略。具有腹外侧开口。5 月份发现了长达 1600 µm 的卵母细胞，是该家族已知的最大的卵母细胞。这也是平均卵母细胞大小最大的月份 (778.38 ± 611.40 µm, N = 2)。这项研究有助于研究海洋无脊椎动物可以采用的许多不同的繁殖策略。具有腹外侧开口。5 月份发现了长达 1600 µm 的卵母细胞，是该家族已知的最大的卵母细胞。这也是平均卵母细胞大小最大的月份 (778.38 ± 611.40 µm, N = 2)。这项研究有助于研究海洋无脊椎动物可以采用的许多不同的繁殖策略。