eschmeyeri the supraorbital appendages are unbranched and flattened (they are leaf-like), while those of R. frondosa are branched. It may be these differences represent sexual dimorphism within R. frondosa.
be reduced); pelvic fins usually with more than five soft rays; 16 or 17 branched caudal fin rays (or 18 or 19 principal rays); maxillae partially included in gape in some. All species share a modification of the anterior part of the supraorbital and ...
 See also: Origin, Dorsal, Base, Species, Fish
  
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