Endangered
Longjaw Silverside
Chirostoma lucius
Longjaw Silverside is a silverside in the family Atherinopsidae (order Atheriniformes) — Chirostoma lucius, recorded as Endangered and tied to Mexico.
The silverside
It was scientifically described by Boulenger in 1900.
Silversides and rainbowfishes are usually slender schooling fishes of lakes, estuaries, or clear streams.
Range and habitat
It is distributed throughout North America: endemic to the Lerma River basin, Mexico.
GBIF currently lists 124 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
Silversides and rainbowfishes need clear water and a place to school. A lake form does not commute to the next basin.
In crisis
Longjaw Silverside 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 Spanish Wikipedia article on Chirostoma lucius, translated and retold in English, plus Wikidata item Q6411406 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.
