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

Typový druh: Dysomma bucephalus Alcock, 1889

Reference: Alcock A. W. 1889. Natural history notes from H. M. Indian marine survey steamer `Investigator,' Commander Alfred Carpenter, R. N., D. S. O., commanding.--No. 13. On the bathybial fishes of the Bay of Bengal and neighbouring waters, obtained during the seasons 1885-1889. Ann. Mag. Nat. Hist. (Ser. 6) v. 4 (no. 24). 450-461.

Přehled druhů

• Dysomma anguillare Barnard, 1923
  
• Dysomma brevirostre (Facciola, 1887)
  Tupohlavec krátkorypý
  Facciolà, L. 1887. Intorno a due Lepadogastrini ed un nuovo Nettastoma del mare di Sicilia. Lettera al Ch. Dott. Cristoforo Bellotti. Naturalista Siciliano [Il Naturalista Siciliano, Giornale di scienze naturali] v. 6: 163-167, Pl. 3.
• Dysomma bucephalus Alcock, 1889
  
• Dysomma dolichosomatum Karrer, 1982
  
• Dysomma fuscoventralis Karrer & Klausewitz, 1982
  
• Dysomma goslinei Robins & Robins, 1976
  
• Dysomma longirostrum Chen & Mok, 2001
  Chen, Y.-Y. & H.-K. Mok 2001. A new synaphobranchid eel, Dysomma longirostrum (Anguilliformes: Synaphobranchidae), from the northeastern coast of Taiwan. Zool. Studies v. 40 (no. 2): 79-83.
• Dysomma melanurum Chen & Weng, 1967
  
• Dysomma muciparus (Alcock, 1891)
  
• Dysomma opisthoproctus Chen & Mok, 1995
  
• Dysomma polycatodon Karrer, 1982
  
• Dysomma tridens Robins, Böhlke & Robins, 1989
  

Statistické údaje

Počet druhů: 12