Further study is needed to clarify the differences between this species and U. lepturus (Richardson) from the Indo-West Pacific.
- Smith, D.G. 1990 Congridae. p. 156-167. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4453) http://www.fishbase.org/references/FBRefSummary.php?id=4453&speccode=299
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