Critically Endangered
Modellnaia siamensis
Modellnaia siamensis
Modellnaia siamensis is a ukab-ukab.
The bivalve
It was first described by Brandt in 1974.
Freshwater mussels sit in the bed of a river and filter water. A larva must hitch a ride on a host fish; a dam can break that cycle.
Freshwater mussels bury in river sediment and can live for decades if the host fish and the current remain.
Range and habitat
Modellnaia siamensis is recorded from Thailand.
GBIF currently lists 17 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.
Breeding
Freshwater mussels bury in the bed and live for decades if the river still runs and the host fish still spawn.
In crisis
Modellnaia siamensis is Critically 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 Modellnaia siamensis, translated and retold in English, plus Wikidata item Q25664336 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.
