Onglemiidae

Onglemiidae is a family of extinct marine invertebrates belonging to the phylum Mollusca. These fossils are found in the fossil record, primarily from the Paleozoic Era. Onglemiids are characterized by a distinctive shell structure, often exhibiting a coiled or cap-like form. The exact phylogenetic relationships of Onglemiidae within Mollusca are still a subject of research, but they are generally considered to be an early and somewhat aberrant lineage. Their shell morphology suggests a benthic lifestyle, likely attached to the substrate or living in shallow marine environments. Fossil discoveries of Onglemiidae provide valuable insights into the diversity and evolution of early mollusks. The family contains a limited number of genera and species, making it a relatively small group within the broader context of fossil mollusks. Their ecological role and specific feeding habits remain largely speculative due to the limited information available from fossilized remains.