Pyramidellinoidea

Pyramidellinoidea is a superfamily of small to minute marine gastropod mollusks in the infraclass Sorbeoconcha. The superfamily was originally described by Ponder and Lindberg in 1997. It is characterized by its small size, typically less than 1 mm in length, and its distinctive shell morphology. The shells are typically low-spired, with a smooth or slightly sculptured surface, and a protoconch that is often well-developed. The aperture is typically oval or rounded, and the columella is usually simple and not dentate.

The superfamily Pyramidellinoidea is found in a wide range of marine environments, including shallow and deep waters, and is known to inhabit a variety of substrates, including soft sediments and hard substrates. The superfamily is known to include a number of economically important species, including several that are used as food sources by humans.

The taxonomy of the superfamily Pyramidellinoidea is still a subject of ongoing research, and the number of species and genera included in the superfamily is likely to increase as new species are described. The superfamily is currently divided into two families, Pyramidellidae and Odostomidae, with the latter family being considered a junior synonym of the former.

The superfamily Pyramidellinoidea is of significant interest to scientists due to its small size and the challenges it presents for identification and classification. The superfamily is also of interest to conservationists due to the potential impact of human activities on the populations of these small marine gastropods.