open access

https://hdl.handle.net/2115/79188

Sexual system in the tanaidacean Falsapseudes bowmani(Crustacea: Malacostraca: Peracarida)

英語

simultaneous hermaphroditism

2019-09

Wiley

Invertebrate Biology

138(3)

e12257

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.

学術雑誌論文

Accepted Manuscript

This is the accepted version of the following article: Keiichi Kakui, Chizue Hiruta and Daisuke Uyeno. Sexual system in the tanaidacean Falsapseudes bowmani (Crustacea: Malacostraca: Peracarida). Invertebrate Biology 138(3) 2019, which has been published in final form at https://doi.org/10.1111/ivb.12257. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

1077-8306

1744-7410

AA11034950