Diagnosis.--Key characters: Ommatidial size coarse (Fig. 39b); prosternal process not planar, expanded apically (Fig. 18); mesal antennal spines present, although very minute; pronotum granulate, with inconspicuous impunctate regions and without rugosities or large confluent punctures; femoral carinae absent; procoxal cavities widely open laterally (Fig. 17); lateral projections into mesocoxae from mesosternum absent (Fig. 20); mesal mesofemoral apices rounded or dentiform (Figs. 25b, 26d); tibial carinae apparently absent; elytral sutural spine moderate (Figs. 8e, 10e); elytral apicolateral spine strong (Figs. 8f, 10f); distinctive punctation of pronotum consisting of micropunctures surrounding small asperites (Fig. 12i). Length: 16-20 mm.

Distribution and Diversity.--Surinam. Monotypic.

Discussion.--More specimens are needed before a thorough characterization of the genus can be made. I hypothesize it may belong near the trichotomy allied to the Mallocera and allies clade (Fig. 59) and the Sphaerion and allies clade (Fig. 60). Parasphaerion may be closely related to Atharsus, to which it approaches in the key characteristics. The granulate pronotum with asperites and spined elytral apices distinguish it from Atharsus.