👉 The term "Alvinocarididae" refers to a group of extinct, highly specialized marine reptiles known for their unique and distinctive characteristics in the family of Alvinocarididae. These marine reptiles lived during the Late Cretaceous period about 65-70 million years ago, making them an early stage in the evolution of modern reptiles. Alvinocarididae are characterized by their long necks and specialized gills that allow for
