👉 Pyramidellidae is a family of extinct birds that lived during the Late Cretaceous period, approximately 60 to 80 million years ago. This family includes several species from around the world and were known for their unique wing shape, which was modified from the wing-like structures of other bird families. The term "pyramidellidae" likely refers to the pyramid-shaped structure found in the wings of these birds. The specific characteristics that distinguish this family include its distinctive wings