Diagnosis.--Key characters: Ommatidial size coarse (Fig. 39b); prosternal process not planar, apex usually slightly expanded (Fig. 18); mesal antennal spines absent; lateral projections into mesocoxae present (Fig. 21); procoxal cavities closed laterally (Fig. 27); antennomere three about two-thirds length of pronotum (Fig. 46b); antennal carinae present (Fig. 45b); lateral mesocoxal cavities closed (Fig. 6e); eyes very large and separated ventrally by widths of about five facets; femoral apices unspined (Fig. 26); tibial carinae absent; femora gradually enlarged (Fig. 37c); elytral apices truncate to dentiform (Fig. 41b-d); Length: 10 mm.
Distribution and Diversity.--Argentina. Monotypic.
Discussion.--The implied weight phylogenetic analysis resulted in Morphaneflus being placed with Micraneflus, and together these are the sister group to Aneflus (and allies) + the clade of Fig. 56. Especially considering the disparate geographical occurrences of these taxa, more character analysis and inclusion of more taxa may help to substantiate or refute this proposed relationship.
Morphaneflus superficially resembles Aneflomorpha. The lack of antennal spines and extremely large eyes separated ventrally by width of five ommatidia in Morphaneflus will distinguish it.