The Costa Rican theraphosine Aenigmarachne sinapophysisSchmidt, 2005 is redescribed and the problematic type locality given by Schmidt (2005) is discussed. Other inconsistencies were found in Schmidt (2005), including erroneous information on urticating setae types, and are addressed. The systematic placement of AenigmarachneSchmidt, 2005 in relation to other Mesoamerican theraphosine genera is briefly discussed, within the confines of the presently available data.