After Good, 1988, and Conrad & Norell, 2008 (fig. 10B), with recent species from Uetz, Etzold & Chenna, 1995-2014 [“The Reptile Database”]

<==o Gerrhonotinae (alligaattoriliskot)
   |-- †Parophisaurus pawneensis
   `--+--o Elgaria
      |  |-- E. cedrosensis (Fitch, 1934)
      |  |-- E. coerulea (Wiegmann, 1828) (pohjanalligaattorilisko)
      |  |-- E. kingii Gray, 1838
      |  |-- E. multicarinata (Blainville, 1835)
      |  |-- E. panamintina (Stebbins, 1958)
      |  |-- E. paucicarinata (Fitch, 1934)
      |  |-- E. usufa Smith, Lemos-Espinal, Chiszar & Ingrasci, 2003
      |  `-- E. velazquezi Grismar & Hollingsworth, 2001
      `--+-- †Paragerrhonotus ricardensis Estes, 1963
         |--o Gerrhonotus (aitoalligaattoriliskot)
         |  |-- G. farri Bryson & Graham, 2010
         |  |-- G. infernalis Baird, 1859
         |  |-- G. liocephalus Wiegmann, 1828
         |  |-- G. lugoi McCoy, 1970
         |  |-- G. ophiurus Cope, 1867
         |  `-- G. parvus Knight & Scudday, 1985 [Elgaria parva]
         `--+--o Barisia
            |  |-- B. herrerae Zaldîvar.Riverón & Nieto-Montes de Oca, 2002
            |  |-- B. imbricata (Wiegmann, 1828)
            |  |-- B. levicollis Stejneger, 1890
            |  `-- B. rudicollis (Wiegmann, 1828)
            `-- Abronia

Gerrhonotinae incertae sedis:

    †“Gerrhonotus” mungerorum
    Coloptychon rhombifer (Peters, 1876)
    Mesaspis
        M. antauges (Cope, 1866)
        M. gadovii (Boulenger, 1913)
        M. juarezi (Karges & Wright, 1987)
        M. monticola (Cope, 1878)
        M. moreletii (Bocourt, 1872)
        M. viridiflava (Bocourt, 1873)

After Good, 1988

<==o Gerrhonotinae
   |-- Coloptychon
   `--+-- Gerrhonotus
      `--+-- Elgaria
         `--+-- Barisia
            `--+-- Mesaspis
               `--+-- †Paragarrhonotus
                  |-- †“Gerrhonotus” mungerorum
                  `-- Abronia

Reference(s):