Stephanogyrus Ochs, 1955

Synonyms: Stephanogyrus Ochs, 1955 syn. nov.

Diagnosis: Within the genus Macrogyrus , Cyclomimus can be diagnosed by the following combination of characters: (1) clypeus considerably enlarged ( Fig. 4F View Figure 4 ), (2) elytra without canaliculate microsculpture and (3) metaventral discrimen without transverse sulcus. Some of the New Guinean species exhibit unique modification to the adhesive setae of the male protarsus. The discus still retains a relatively normal amount of setae; however, outside the discus the adhesive setae are reduced in number, nearly absent from the ventral face of the ultimate protarsomere, and have very large suction cups. The species within this group are smaller in body size than most other members of Macrogyrus , but not all.

Taxonomy: Five known species, and the subgenus is returned to its original sense as initially proposed by Ochs (1949). The species were most recently treated by Ochs (1955) (for the New Guinea species) and by Mazzoldi (2010) (for M. caledonicus ).

Distribution: Primarily found in New Guinea (fours species) ( Ochs, 1955) where it appears widespread, with one species from Grande Terre, New Caledonia ( Mazzoldi, 2010).

Discussion: The subgenus Stephanogyrus was erected for the single species M. caledonicus by Ochs (1955) based only on modifications to the elytral apices and reticulation patterning. While this species was not included in the formal phylogenetic analysis, specimens were studied and found to exhibit the diagnostic features uniting the monophyletic group of species from New Guinea. Furthermore, this returns Cyclomimus to its original sense, prior to splitting of a single isolated species from New Caledonia.