Robuta

https://collections.nlm.nih.gov/catalog/nlm:nlmuid-101594424-img Successive forms of paludina, from the tertiary deposits of Slavonia (after Neumayr) - Digital... from the https://www.merriam-webster.com/dictionary/paludina PALUDINA Definition & Meaning - Merriam-Webster The meaning of PALUDINA is a mollusk of the genus Viviparus. definition meaning merriam webster