Robuta

https://www.mapress.com/zs/article/view/zoosymposia.13.1.14 Atlantidae (Pterotracheoidea) of the northeast Pacific | Zoosymposia of the northeast pacific atlantidae pterotracheoidea https://www.planktonic.org/ Shelled Heteropod Identification Portal | Atlantidae Online identification guide and information portal for the Atlantidae, tiny marine planktonic snails. heteropod identification portal atlantidae