Orthalicoidea

Orthalicoidea is a superfamily of air-breathing land snails and slugs, comprising a diverse group of gastropod mollusks. These snails are characterized by their generally large, often ovate or globose shells. The aperture of the shell is typically simple, lacking elaborate folds or teeth, though some genera may exhibit a parietal lamella. The external anatomy of Orthalicoidea varies, but many possess a distinct columellar fold.

The distribution of Orthalicoidea is primarily Neotropical, with species found throughout Central and South America, as well as the Caribbean islands. Some representatives have also been introduced to other parts of the world. They inhabit a wide range of terrestrial environments, including forests, grasslands, and even arid regions, with many species being arboreal or dwelling on the ground.

The diet of Orthalicoidea generally consists of decaying organic matter, fungi, and vegetation. Reproduction is typically oviparous, with eggs laid in the soil or other protected locations. The superfamily includes several well-known families such as the Orthalicidae, Bulimulidae, and Placostylidae. These snails play roles in their ecosystems as decomposers and as a food source for other animals. Their shells are often collected by humans for their aesthetic qualities.