After De Pinna, 1992 and Nelson, 1994, with species from Froese & Pauly, 2001 [“The Fishbase”]

<==o Vandelliinae (candirus; aitoloismonnit)
   |-- Branchioica teaguei (Devincenzi & Vaz-Ferreira, 1939)
   |-- Paraacanthopoma
   |--o Paravandellia
   |  |-- P. oxyptera Miranda-Ribeiro, 1912
   |  `-- P. phaneronema (Miles, 1943)
   |--o Plectrochilus
   |  |-- P. diabolicus (Myers, 1927)
   |  |-- P. machadoi Miranda-Ribeiro, 1917
   |  `-- P. wieneri (Pellegrin, 1909)
   `--o Vandellia
      |-- V. balzanii Perugia, 1846
      |-- V. beccarii Di Caporiacco, 1935
      |-- V. cirrhosa Valenciennes, 1846 (loismonni; Candiru)
      |?- V. hasemani
      |-- V. plazaii Castelnau, 1855
      `-- V. sanguinea Eigenmann, 1917

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