do mexican salamanders has been extinct completely in global range

Mexican salamanders, of which there are several species found in Mexico, are not universally extinct. However, many of these unique amphibians face significant threats due to habitat loss, environmental changes, pollution, and disease, such as the highly infectious and lethal Chytrid fungus.

However, it's important to specify the species since different Mexican salamanders have different conservation statuses:

• Ambystoma velasci: This species, known as the Oaxacan salamander, unfortunately, has been listed as possibly extinct in the wild, although this is still under assessment.
• Other species, such as Ambystoma maculatum (spotted salamander) or Ambystoma dumerilii (mottled salamander) are not completely extinct but might be endangered or threatened depending on the subspecies.

To conclude, while some Mexican salamanders may be critically endangered or facing extinction, it is not accurate to say that Mexican salamanders as a group are completely extinct globally. Their exact status varies from species to species, and conservation efforts are crucial to protect those that remain.