Family Planaxidae : 2 Subfamily
 1/2  Subfamily Fossarinae : 4 Genus 
   1/4  Genus Anafossarus : 1 Species 
     1/1 Anafossarus sydneyensis
   2/4  Genus Chilkaia : 1 Species 
     1/1 Chilkaia imitatrix
   3/4  Genus Fossarus : 25 Species 
     1/25 Fossarus ambiguus
     2/25 Fossarus angiostoma
     3/25 Fossarus angulatus
     4/25 Fossarus beccarii
     5/25 Fossarus brumalis
     6/25 Fossarus capensis
     7/25 Fossarus cereus
     8/25 Fossarus cumingii
     9/25 Fossarus dentifer
     10/25 Fossarus fischeri
     11/25 Fossarus garrettii
     12/25 Fossarus guayaquilensis
     13/25 Fossarus laeviusculus
     14/25 Fossarus lamellosus
     15/25 Fossarus lucanus
     16/25 Fossarus lui
     17/25 Fossarus mediocris
     18/25 Fossarus megasoma
     19/25 Fossarus multicostatus
     20/25 Fossarus orbignyi
     21/25 Fossarus purus
     22/25 Fossarus stoliczkanus
     23/25 Fossarus translucens
     24/25 Fossarus trochlearis
     25/25 Fossarus tuberosus
   4/4  Genus Larinopsis : 2 Species 
     1/2 Larinopsis ostensus
     2/2 Larinopsis turbinata
 2/2  Subfamily Planaxinae : 7 Genus 
   1/7  Genus Fissilabia : 1 Species 
     1/1 Fissilabia decollata
   2/7  Genus Halotapada : 1 Species 
     1/1 Halotapada nubila
   3/7  Genus Hinea : 11 Species 
     1/11 Hinea akuana
     2/11 Hinea atra
     3/11 Hinea brasiliana
     4/11 Hinea fasciata
     5/11 Hinea fortdauphinensis
     6/11 Hinea inepta
     7/11 Hinea lineata
     8/11 Hinea longispira
     9/11 Hinea nucleola
     10/11 Hinea punctostriata
     11/11 Hinea zonata
   4/7  Genus Holcostoma : 2 Species 
     1/2 Holcostoma piliger
     2/2 Holcostoma setigerum
   5/7  Genus Planaxis : 4 Species 
     1/4 Planaxis savignyi
     2/4 Planaxis sulcatus
     3/4 Planaxis suturalis
     4/4 Planaxis virgatus
   6/7  Genus Simulathena : 1 Species 
     1/1 Simulathena papuensis
   7/7  Genus Supplanaxis : 8 Species 
     1/8 Supplanaxis acutus
     2/8 Supplanaxis leyteensis
     3/8 Supplanaxis nancyae
     4/8 Supplanaxis niger
     5/8 Supplanaxis nucleus
     6/8 Supplanaxis obsoletus
     7/8 Supplanaxis planicostatus
     8/8 Supplanaxis riccardomeli
57 Species in Planaxidae 

(Extracted from WoRMS on October 2025)
NB: status "accepted" and "extant, not fossile-only"