Zonites siphnicus is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Zonitidae. Zonites siphnicus is considered to be extinct. Distribution This species was endemic to Cyclades Islands, Greece. References External links S Extinct gastropods Endemic fauna of Greece Molluscs of Europe Molluscs of the Mediterranean Sea Extinct invertebrates since 1500 Gastropods described in 1936