Thorunna

The genus Thorunna contains chromodorid nudibranchs with a distinctive radula, which is very small and has 17-25 teeth in a half-row. The lateral teeth are long slender shafts with bluntly bifid tips. Species in this genus rarely exceed 20 mm (0.79 in) and wriggle or vibrate their gills rhythmically. Anatomically the buccal bulb is very small relative to most chromodorids and the oral tube very long.^[6]

Species in the genus Thorunna include^[2]:

• Thorunna africana Rudman, 1984
• Thorunna arbuta (Burn, 1961)
• Thorunna australis Risbec, 1928
• Thorunna daniellae Kay & Young, 1969
• Thorunna florens Baba, 1949
• Thorunna furtiva Bergh, 1878
• Thorunna halourga Johnson & Gosliner, 2001
• Thorunna horologia Rudman, 1984
• Thorunna kahuna Johnson & Gosliner, 2001
• Thorunna montrouzieri Rudman, 1995
• Thorunna perplexa Burn, 1957
• Thorunna punicea Rudman, 1995
• Thorunna purpuropedis Rudman & Johnson, 1985
• Thorunna speciosa Rudman, 1990
• Thorunna talaverai Ortea, Bacallado & Valdés, 1992

• 
  Thorunna africana
• 
  Thorunna arbuta
• 
  Thorunna florens
• 
  Thorunna furtiva
• 
  Thorunna halourga
• 
  Thorunna horologia
• 
  Thorunna punicea

Species brought into synonymy

• Thorunna decussata Risbec, 1928: synonym of Verconia decussata
• Thorunna lapislazuli Bertsch & Ferreira, 1974: synonym of Felimare lapislazuli
• Thorunna scottjohnsoni Bertsch & Gosliner, 1989: synonym of Ardeadoris scottjohnsoni
• Thorunna speciosus Rudman, 1990: synonym of Thorunna speciosa
• Thorunna tura Ev. Marcus & Er. Marcus, 1967: synonym of Mexichromis tura