Where has the Thyca crystallina been recorded?

Thyca crystallina occurrence evidence comes from 647 records in 9 countries and territories, from 1900 to 2025. Most records come from Indonesia.

• 647 records
• 9 places
• 13 years recorded
• Gastropoda class

Observation evidence passport

Compare this animal’s observation pattern

When it is recorded

Peak month: May. Records cluster in the months an animal is present and being looked for, so a summer peak can reflect observer effort as much as the animal.

Records over time

Recording effort has risen steeply almost everywhere since the 1990s, so a rising line usually shows more observers rather than more animals.

Where Thyca crystallina has been recorded

The countries below show where occurrence evidence exists for Thyca crystallina. They do not define a complete habitat range: survey effort differs by place, and historical or one-off records can appear alongside repeated presence.