Třída: Actinopterygii - paprskoploutví
Řád: Anguilliformes - holobřiší
Čeleď: Synaphobranchidae - tupohlavcovití

Typový druh: Synaphobranchus kaupii Johnson, 1862

Reference: Johnson J. Y. 1862. Descriptions of some new genera and species of fishes obtained at Madeira. Proc. Zool. Soc. Lond. 1862 (pt 2). 167-180.

Přehled druhů

• Synaphobranchus affinis Günther, 1877
  Tupohlavec dlouhoploutvý
  Günther, A. 1877. Preliminary notes on new fishes collected in Japan during the expedition of H. M. S. `Challenger.'. Ann. Mag. Nat. Hist. (Ser. 4) v. 20 (no. 119): 433-446.
• Synaphobranchus brevidorsalis Günther, 1887
  Tupohlavec krátkochvostý
  Günther, A. 1887. Report on the deep-sea fishes collected by H. M. S. Challenger during the years 1873-76. Rep. Sci. Res. Voy. H.M.S. Challenger v. 22 (pt 57): i-lxv + 1-268, Pls. 1-66.
• Synaphobranchus calvus Melo, 2007
  Melo M.R.S. 2007. A New Synaphobranchid Eel (Anguilliformes: Synaphobranchidae) from Brazil, with Comments on the Species from the Western South Atlantic. Copeia, 2007(2), pp. 315–323.
• Synaphobranchus kaupii Johnson, 1862
  Tupohlavec Kaupův
  Johnson, J. Y. 1862. Descriptions of some new genera and species of fishes obtained at Madeira. Proc. Zool. Soc. Lond. 1862 (pt 2): 167-180, Pls. 22-23.
• Synaphobranchus oregoni Castle, 1960
  Tupohlavec alabamský
  Castle, P. H. J. 1960. Two eels of the genus Synaphobranchus from the Gulf of Mexico. Fieldiana Zool. v. 39 (no. 35): 387-398.

Statistické údaje

Počet druhů: 5