Endangered
Iomon nan
Iomon nan
No subspecies are listed on that page.
The crayfish or crab
It was first described by Ng ug Naiyanetr in 1993.
Decapods are ten-legged crustaceans — crabs, shrimps, and crayfishes. Freshwater species here are usually tied to a drainage.
Malacostracans include crayfishes, crabs, and shrimps. Freshwater species are often narrow endemics.
Range and habitat
Iomon nan is recorded from Thailand.
GBIF currently lists 3 occurrence points. Those points follow where people logged the taxon — museum drawers and surveys included — not a closed range boundary.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Habits
Freshwater crayfishes and crabs walk the bed. Dams, silt, and introduced species cut a drainage into fragments they cannot cross.
Crayfishes and crabs need cover and clean water. A named form from one creek is not interchangeable with the next drainage.
In crisis
Iomon nan is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the Cebuano Wikipedia article on Iomon nan, translated and retold in English, plus Wikidata item Q13367626 and GBIF occurrence geography. Family and order context is original field-guide writing about the group. Wikipedia text is CC BY-SA. Not an IUCN assessment. Confirm status and range on iucnredlist.org.
