Mecodema manaia is a medium-sized ground beetle species found in the native forests of Bream Head and Mt Manaia, Northland, New Zealand. This species shares the forests of Bream Head with a large-bodied species, Mecodema tewhara, with both inhabiting slightly different forest type.
Distinguished from other North Island Mecodema species by having:
Length , pronotal width , elytral width . Colour of entire body matte to glossy black.
Mecodema manaia is found in the native broadleaf forest, especially areas with deep leaf litter.
Under the New Zealand Threat Classification System, this species is listed as "Declining".