Pectinodontidae is a

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

of sea snails or true limpets, marine gastropod

mollusk Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...

s in the superfamily

Lottioidea Lottioidea is a superfamily of sea snails or limpets, marine gastropod mollusks in the clade Patellogastropoda, the true limpets.MolluscaBase (2018). Lottioidea Gray, 1840. Accessed through: World Register of Marine Species at: http://www.marines ...

, the true limpets. Lottioidea

Taxonomy

This family was previously ranked as subfamily Pectinodontinae (also with Acmaeinae and Rhodopetalinae) in the family Acmeaidae in the taxonomy of the Gastropoda by Bouchet & Rocroi (2005). Nakano & Ozawa (2007) elevated Pectinodontinae to family level Pectinodontidae based on

molecular phylogeny Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

research. A

cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to ...

showing phylogenic relations of Patellogastropoda:

Genera

Genera in the family Pectinodontidae include: * '' Bathyacmaea'' * '' Bathyacmaea secunda'' Okutani, Fujikura & Sasaki, 1993 *'' Pectinodonta'' - the earliest known ''Pectinodonta'' are from

Late Oligocene The Chattian is, in the geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/ Series. It spans the time between . The Chattian is preceded by the Rupelian and is followed by the Aquitanian (the lowest stage ...

Taxonomy

Genera

References

Further reading