Lowery and Newman, 1949,
San Luis Potosí, Mexico.
Considered a member of G. minutissimum complex, which includes also G. palmarum, G. griseiceps, G. parkeri and G. hardyi; further study needed to determine true relationships. Recently separated from G. minutissimum on basis of vocalizations. Monotypic.
NE Mexico (S Tamaulipas, SE San Luis Potosí and extreme N Hidalgo).
Food and feeding
Status and conservation
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