Kroh, A.; Mooi, R. (2024). World Echinoidea Database.
Pygaster langanoides †. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=754826 on 2024-09-09
Marine Species Traits editorial board (2024). Marine Species Traits.
Pygaster langanoides †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=754826 on 2024-09-09