Sexual system in the tanaidacean Falsapseudes bowmani (Crustacea: Malacostraca: Peracarida)
Sexual system in the tanaidacean Falsapseudes bowmani (Crustacea: Malacostraca: Peracarida)
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DOI：
10.1111/ivb.12257
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发表时间：
2019-08
影响因子：
1.2
通讯作者：
K. Kakui;Chizue Hiruta;D. Uyeno
中科院分区：
文献类型：
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作者：
K. Kakui;Chizue Hiruta;D. Uyeno
软甲纲有40，000多个物种，是最多样化的甲壳纲。大多数软甲介类是雌雄异体的，但同时雌雄同体也是已知的。Tanaidacea是两个软甲目之一，包括同时雌雄同体的物种;到目前为止，同时雌雄同体已被证实在外部和内部只有两个Tanaidacea物种，都在属Applodes（Applodidae）。在这里，我们表明，通过外部和内部的形态观察固定标本，apapartido Falsapartides bowmani是一个同时雌雄同体，使Falsapartides的第二个tanaidaceans属，其中同时雌雄同体已被证实的外部和内部。在这个物种中，大标本的上表皮（唇基上的突起）厚而长，但在较小的标本中薄而刺状;只有在薄上表皮个体中观察到卵或胚胎的孵化，尽管在厚和薄上表皮个体中都证实了一对卵巢。这表明，具有厚的上位体的个体可以作为雄性，同时也保留了雌性生殖器官。
With more than 40,000 species, Malacostraca is the most diverse crustacean class. Most malacostracans are gonochoristic, but simultaneous hermaphrodites are also known. Tanaidacea is one of two malacostracan orders that includes simultaneously hermaphroditic species; so far, simultaneous hermaphroditism has been confirmed externally and internally in only two tanaidacean species, both in the genus Apseudes (Apseudidae). Here we show, through external and internal morphological observations of fixed specimens, that the apseudid Falsapseudes bowmani is a simultaneous hermaphrodite, making Falsapseudes the second tanaidacean genus in which simultaneous hermaphroditism has been confirmed both externally and internally. In this species, the epistome (a projection on the clypeus) was thick and elongate in large specimens but was thin and spiniform in smaller specimens; the brooding of eggs or embryos was observed only in thin‐epistome individuals, although a pair of ovaries was confirmed in both thick‐ and thin‐epistome individuals. This suggests that individuals with a thick epistome may act as males while also retaining the female reproductive organs.