The species of this genus were recorded in Holarctic, Mesoamerican, Middle East, Neotropical, Oriental and regions (Noyes, 2001).

Dicladocerus belongs to the Eulophini due to the following characters: funicle 3-4 segmented, propleura meeting posteriorly and covering prosternum, 2 pairs of scutellar setae and 3 or more setae on submarginal vein, postmarginal vein at least 1.5 times length of stigmal vein. Within the Eulophini, Dicladocerus is a relatively easy genus to recognise: the combination of funicle 3-segmented in female and the male antenna with 2 branches is not very common. Sometimes Pnigalio has a 3-segmented female funicle as well (Yoshimoto, 1983), but the male funicle always has 3 branches.
Dicladocerus may be distinguished from the other Eulophini genera attacking leafmining flies using the following characters: it has a pair of longitudinal lines on scutellum (absent in Hemiptarsenus, Pnigalio and Sympiesis), doesn’t have costula on the propodeum (present in Pnigalio and Ratzeburgiola) and doesn’t have 2 median carinae (H-or X-shaped) on the propodeum (present in Stenomesius).
Keys to Dicladocerus are available for North American (Yoshimoto, 1976) and for Indian species (Khan, 1995).