Mesobatrachia is the second largest of the Anura suborders of amphibians. It contains 6 families, 20 genera and 168 species. This is, of course, not matched to the 5,047 species noted in the Neobatrachia

Neobatrachia

Neobatrachia are a suborder of the Anura, the order of frogs and toads. This suborder is the most advanced and apomorphic of the three anuran orders alive today; hence its name, which literally means "new frogs"...

suborder. The name suggests they are moderately old (compared to the prefixes archeo- "ancient" and neo- "new" of the other two suborders).

Mesobatrachia are a relatively new group, only having been identified as such in 1993.