Třída: Actinopterygii - paprskoploutví
Řád: Anguilliformes - holobřiší
Čeleď: Ophichthidae - hadařovití

Typový druh: Ophichthus evionthas Jordan & Bollman, 1889

Reference: Jordan D. S. & Davis B. M. 1891. A preliminary review of the apodal fishes or eels inhabiting the waters of America and Europe. Rep. U. S. Fish Comm. v. 16 [1888]. 581-677.

Přehled druhů

• Quassiremus ascensionis (Studer, 1889)
  Hadař ascensionský
  Studer, T. 1889. Die Forschungsreise SMS "Gazelle" in den Jahren 1874 bis 1876 unter Kommando des Kapitän zur See Freiherrn von Schleinitz ...III. Theil: Zoologie und Geologie. Berlin. Forschungreise Gazelle: i-vi + 1-322, Pls. 1-33.
• Quassiremus evionthas (Jordan & Bollman, 1890)
  Hadař espaňolský
  Jordan, D. S. & C. H. Bollman. 1890. Descriptions of new species of fishes collected at the Galapagos Islands and along the coast of the United States of Colombia, 1887-'88. In: Scientific results of explorations by the U. S. Fish Commission steamer Albatross. Proceedings of the United States National Museum v. 12 (no. 770): 149-183.
• Quassiremus nothochir (Gilbert, 1890)
  Hadař pobřežní
  Gilbert, C. H. 1890. A preliminary report on the fishes collected by the steamer Albatross on the Pacific coast of North America during the year 1889, with descriptions of twelve new genera and ninety-two new species. Proceedings of the United States National Museum v. 13 (no. 797): 49-126.
• Quassiremus polyclitellum Castle, 1996
  Hadař novozélandský
  Castle, P. H. J. 1996. A new, distinctively colored snake eel (Anguilliformes: Ophichthidae) from northeastern New Zealand. Pacific Science v. 50 (no. 1): 108-116.

Statistické údaje

Počet druhů: 4