Davus pentaloris is a species of New World tarantula (family Theraphosidae) native to Mexico and Guatemala.

Davus was at one time considered to be a synonym of Cyclosternum, and its species were placed in that genus, but this is no longer accepted.

[1] D. pentaloris has been found to display high morphological variation across its widespread distribution.

[2] Due to the typically low dispersal capability of tarantulas and associated high levels of local endemism this led to a hypothesis of hidden diversity within the species, with the high morphological variation suspected to be evidence that D. pentaloris is actually a species complex.

[3] Morphological and molecular analyses employing mtDNA data led to the recognition of 13 clearly diagnosable species, with 12 of them being new to science.