†Graecoanatolica macedonica is an extinct species

Species

In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of small freshwater snail

Freshwater snail

A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....

, an aquatic

Aquatic animal

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...

 gastropod mollusk in the family Hybrobiidae.

Distribution

This species existed only in a single habitat, in Dojran Lake

Dojran Lake

Dojran Lake is a lake with an area of 43.1 km² shared between the Republic of Macedonia and West Macedonia within Greek Macedonia, Greece . To the west is the city of Nov Dojran , to the east the village of Mouries, to the north the mountain Belasica/Beles and to the south the Greek town of...

, situated on the border between Greece and what is today the Republic of Macedonia

Republic of Macedonia

Macedonia , officially the Republic of Macedonia , is a country located in the central Balkan peninsula in Southeast Europe. It is one of the successor states of the former Yugoslavia, from which it declared independence in 1991...

. The population of the snail began to decline in the 1970s. Researchers were unable to locate any members of the species after 1992, and it is now presumed extinct.