Ostrea jibananandai

Ostrea jibananandai; Temporal range: Ypresian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Ostreida
Family:	Ostreidae
Genus:	Ostrea
Species:	O. jibananandai
Binomial name
	Ostrea jibananandai; Halder & Mitra, 2021

Last updated April 16, 2025

Ostrea jibananandai is an extinct species of Ostrea that lived during the Ypresian stage of the Palaeogene period.

Palaeobiology

O. jibananandai dwarf males have been found attached inside the anterior end of the hinge of large females, representing the earliest occurrence of facultative monogamy in oysters. This behaviour, which reduces evolutionary flexibility, is believed to have evolved in response to the hyperthermal events of the Early Eocene.^[1]

References

↑ Halder, Kalyan; Mitra, Aniket (2021). "Facultative monogamy in an early Eocene brooding oyster and its evolutionary implications". Acta Palaeontologica Polonica . 66. doi:10.4202/app.00863.2020 . Retrieved 13 April 2025.

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[1] Halder, Kalyan; Mitra, Aniket (2021). "Facultative monogamy in an early Eocene brooding oyster and its evolutionary implications". Acta Palaeontologica Polonica . 66. doi:10.4202/app.00863.2020 . Retrieved 13 April 2025.

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