Synbranchus marmoratus group

Fig. 5B

Distribution.

Upper rio Santo Antônio, rio Doce basin.

Diagnosis.

Synbranchus marmoratus group is diagnosed by having dark-brown color on dorsal region of body and light brown below the midline and head; many rounded dark spots or irregularly shaped dark spots throughout the whole body; dark stripe composed by fusion of many dark spots in ventrolateral region of head.

Remarks.

Albeit the true S. marmoratus have a wide distribution in the Neotropical region, in this study we refer the species as S. marmoratus group, since the taxonomic status of S. marmoratus may represent more than one species. A taxonomic review of S. marmoratus from Central and South America is needed to clarify this problematic issue.