Key to species of Meridiotroctes:

1 Distance between upper eye lobes approximately equal to width of one lobe; elytral apices truncate................... 2

- Distance between lower eye lobes distinctly larger than width of one lobe; elytral apices rounded...................... 3

2(1) Distal half of elytra with oblique dark bands. Brazil (Bahia)................................... M. obliquuus sp. nov.

- Distal half of elytra without oblique dark bands. Brazil (Bahia)................... M. truncatus Martins & Galileo, 2011

3(1) Elytral length distinctly less than twice humeral width; protarsomere I shorter than II‒III together. Brazil (Rio de Janeiro, São Paulo, Santa Catarina).................................................. M. meridionalis Martins & Galileo, 2007

- Elytral length equal to approximately twice humeral width; protarsomere I about as long as II‒III together. Brazil (Rio de Janeiro).............................................................. M. bicristatus Machado & Monné, 2009