Family Mytilidae : 8 Subfamily
 1/8  Subfamily Brachidontinae : 4 Genus 
   1/4  Genus Brachidontes : 28 Species 
     1/28 Brachidontes adamsianus
     2/28 Brachidontes aequatorialis
     3/28 Brachidontes crebristriatus
     4/28 Brachidontes darwinianus
     5/28 Brachidontes domingensis
     6/28 Brachidontes dunkeri
     7/28 Brachidontes erosus
     8/28 Brachidontes esmeraldensis
     9/28 Brachidontes exustus
     10/28 Brachidontes granulatus
     11/28 Brachidontes houstonius
     12/28 Brachidontes maritimus
     13/28 Brachidontes modiolus
     14/28 Brachidontes mutabilis
     15/28 Brachidontes niger
     16/28 Brachidontes pharaonis
     17/28 Brachidontes playasensis
     18/28 Brachidontes puniceus
     19/28 Brachidontes puntarenensis
     20/28 Brachidontes rodriguezii
     21/28 Brachidontes sculptus
     22/28 Brachidontes semilaevis
     23/28 Brachidontes subramosus
     24/28 Brachidontes undulatus
     25/28 Brachidontes ustulatus
     26/28 Brachidontes variabilis
     27/28 Brachidontes virgiliae
     28/28 Brachidontes ynous
   2/4  Genus Geukensia : 2 Species 
     1/2 Geukensia demissa
     2/2 Geukensia granosissima
   3/4  Genus Ischadium : 1 Species 
     1/1 Ischadium recurvum
   4/4  Genus Mytilaster : 5 Species 
     1/5 Mytilaster lineatus
     2/5 Mytilaster marioni
     3/5 Mytilaster minimus
     4/5 Mytilaster solidus
     5/5 Mytilaster solisianus
 2/8  Subfamily Crenellinae : 12 Genus 
   1/12  Genus Arcuatula : 10 Species 
     1/10 Arcuatula arcuatula
     2/10 Arcuatula capensis
     3/10 Arcuatula elegans
     4/10 Arcuatula glaberrima
     5/10 Arcuatula japonica
     6/10 Arcuatula papyria
     7/10 Arcuatula perfragilis
     8/10 Arcuatula senhousia
     9/10 Arcuatula tristis
     10/10 Arcuatula variegata
   2/12  Genus Arvella : 4 Species 
     1/4 Arvella faba
     2/4 Arvella japonica
     3/4 Arvella manshurica
     4/4 Arvella pectinula
   3/12  Genus Choromytilus : 3 Species 
     1/3 Choromytilus chorus
     2/3 Choromytilus meridionalis
     3/3 Choromytilus palliopunctatus
   4/12  Genus Crenella : 10 Species 
     1/10 Crenella arenaria
     2/10 Crenella caudiva
     3/10 Crenella decussata
     4/10 Crenella divaricata
     5/10 Crenella gemma
     6/10 Crenella magellanica
     7/10 Crenella marionensis
     8/10 Crenella minuta
     9/10 Crenella pellucida
     10/10 Crenella pura
   5/12  Genus Exosiperna : 3 Species 
     1/3 Exosiperna kuroharai
     2/3 Exosiperna relata
     3/3 Exosiperna scapha
   6/12  Genus Musculus : 30 Species 
     1/30 Musculus alganus
     2/30 Musculus aviarius
     3/30 Musculus calceatus
     4/30 Musculus coenobitus
     5/30 Musculus concinnus
     6/30 Musculus costulatus
     7/30 Musculus cumingianus
     8/30 Musculus cupreus
     9/30 Musculus discors
     10/30 Musculus glacialis
     11/30 Musculus impactus
     12/30 Musculus impressus
     13/30 Musculus imus
     14/30 Musculus koreanus
     15/30 Musculus lateralis
     16/30 Musculus minutus
     17/30 Musculus nana
     18/30 Musculus nanulus
     19/30 Musculus niger
     20/30 Musculus nipponicus
     21/30 Musculus panhai
     22/30 Musculus phenax
     23/30 Musculus pusio
     24/30 Musculus pygmaeus
     25/30 Musculus semiradiatus
     26/30 Musculus subpictus
     27/30 Musculus taylori
     28/30 Musculus varicosus
     29/30 Musculus viator
     30/30 Musculus viridulus
   7/12  Genus Mytella : 5 Species 
     1/5 Mytella brasiliensis
     2/5 Mytella guyanensis
     3/5 Mytella speciosa
     4/5 Mytella strigata
     5/5 Mytella tumbezensis
   8/12  Genus Parabrachidontes : 3 Species 
     1/3 Parabrachidontes amnicus
     2/3 Parabrachidontes cochinensis
     3/3 Parabrachidontes leucostictus
   9/12  Genus Perna : 4 Species 
     1/4 Perna canaliculus
     2/4 Perna fortdauphinensis
     3/4 Perna perna
     4/4 Perna viridis
   10/12  Genus Rhomboidella : 10 Species 
     1/10 Rhomboidella canariensis
     2/10 Rhomboidella capensis
     3/10 Rhomboidella malaccana
     4/10 Rhomboidella obesa
     5/10 Rhomboidella perstriata
     6/10 Rhomboidella prideauxi
     7/10 Rhomboidella radians
     8/10 Rhomboidella rhyllensis
     9/10 Rhomboidella rodriguesensis
     10/10 Rhomboidella vaillanti
   11/12  Genus Solamen : 10 Species 
     1/10 Solamen bulla
     2/10 Solamen columbianum
     3/10 Solamen dollfusi
     4/10 Solamen glandula
     5/10 Solamen leanum
     6/10 Solamen megas
     7/10 Solamen persicum
     8/10 Solamen recens
     9/10 Solamen spectabile
     10/10 Solamen striatissimum
   12/12  Genus Vilasina : 5 Species 
     1/5 Vilasina decorata
     2/5 Vilasina pillula
     3/5 Vilasina seminuda
     4/5 Vilasina sinica
     5/5 Vilasina vernicosa
 3/8  Subfamily Dacrydiinae : 1 Genus 
   1/1  Genus Dacrydium : 28 Species 
     1/28 Dacrydium abyssorum
     2/28 Dacrydium albidum
     3/28 Dacrydium alleni
     4/28 Dacrydium angulare
     5/28 Dacrydium balgimi
     6/28 Dacrydium dauvini
     7/28 Dacrydium elegantulum
     8/28 Dacrydium fabale
     9/28 Dacrydium filiferum
     10/28 Dacrydium gloriosense
     11/28 Dacrydium hedleyi
     12/28 Dacrydium hendersoni
     13/28 Dacrydium hyalinum
     14/28 Dacrydium knudseni
     15/28 Dacrydium leucoguttatum
     16/28 Dacrydium nipponicum
     17/28 Dacrydium occidentale
     18/28 Dacrydium ockelmanni
     19/28 Dacrydium pacificum
     20/28 Dacrydium panamense
     21/28 Dacrydium pelseneeri
     22/28 Dacrydium rostriferum
     23/28 Dacrydium sandersi
     24/28 Dacrydium speculum
     25/28 Dacrydium vitreum
     26/28 Dacrydium viviparum
     27/28 Dacrydium wareni
     28/28 Dacrydium zebra
 4/8  Subfamily Lithophaginae : 1 Genus 
   1/1  Genus Lithophaga : 9 Species 
     1/9 Lithophaga antillarum
     2/9 Lithophaga caperata
     3/9 Lithophaga cylindrica
     4/9 Lithophaga lithophaga
     5/9 Lithophaga nigra
     6/9 Lithophaga punctata
     7/9 Lithophaga robusta
     8/9 Lithophaga teres
     9/9 Lithophaga zitteliana
 5/8  Subfamily Mytilidae incertae sedis : 3 Genus 
   1/3  Genus Amygdalum : 11 Species 
     1/11 Amygdalum americanum
     2/11 Amygdalum anoxicolum
     3/11 Amygdalum arborescens
     4/11 Amygdalum newcombi
     5/11 Amygdalum pallidulum
     6/11 Amygdalum peasei
     7/11 Amygdalum politum
     8/11 Amygdalum sagittatum
     9/11 Amygdalum soyoae
     10/11 Amygdalum striatum
     11/11 Amygdalum watsoni
   2/3  Genus Aulacomya : 3 Species 
     1/3 Aulacomya atra
     2/3 Aulacomya maoriana
     3/3 Aulacomya regia
   3/3  Genus Urumella : 1 Species 
     1/1 Urumella concava
 6/8  Subfamily Mytilinae : 6 Genus 
   1/6  Genus Adula : 7 Species 
     1/7 Adula californiensis
     2/7 Adula diegensis
     3/7 Adula falcatoides
     4/7 Adula gruneri
     5/7 Adula kleemanni
     6/7 Adula schmidtii
     7/7 Adula soleniformis
   2/6  Genus Crenomytilus : 1 Species 
     1/1 Crenomytilus grayanus
   3/6  Genus Dentimodiolus : 2 Species 
     1/2 Dentimodiolus striatulus
     2/2 Dentimodiolus subsulcatus
   4/6  Genus Gregariella : 19 Species 
     1/19 Gregariella australis
     2/19 Gregariella bakeri
     3/19 Gregariella barbata
     4/19 Gregariella chenui
     5/19 Gregariella coarctata
     6/19 Gregariella coralliophaga
     7/19 Gregariella denticulata
     8/19 Gregariella difficilis
     9/19 Gregariella ehrenbergi
     10/19 Gregariella exilis
     11/19 Gregariella fischeri
     12/19 Gregariella multistriata
     13/19 Gregariella nubilis
     14/19 Gregariella obermulleri
     15/19 Gregariella petagnae
     16/19 Gregariella semigranata
     17/19 Gregariella setigera
     18/19 Gregariella splendida
     19/19 Gregariella vignoni
   5/6  Genus Mytilus : 8 Species 
     1/8 Mytilus californianus
     2/8 Mytilus chilensis
     3/8 Mytilus coruscus
     4/8 Mytilus edulis
     5/8 Mytilus galloprovincialis
     6/8 Mytilus planulatus
     7/8 Mytilus platensis
     8/8 Mytilus trossulus
   6/6  Genus Trichomya : 1 Species 
     1/1 Trichomya hirsuta
 7/8  Subfamily Mytiliseptinae : 4 Genus 
   1/4  Genus Austromytilus : 1 Species 
     1/1 Austromytilus rostratus
   2/4  Genus Mytilisepta : 4 Species 
     1/4 Mytilisepta bifurcata
     2/4 Mytilisepta eliae
     3/4 Mytilisepta keenae
     4/4 Mytilisepta virgata
   3/4  Genus Perumytilus : 1 Species 
     1/1 Perumytilus purpuratus
   4/4  Genus Semimytilus : 1 Species 
     1/1 Semimytilus patagonicus
 8/8  Subfamily Septiferinae : 1 Genus 
   1/1  Genus Septifer : 7 Species 
     1/7 Septifer bilocularis
     2/7 Septifer cumingii
     3/7 Septifer excisus
     4/7 Septifer ramulosus
     5/7 Septifer rudis
     6/7 Septifer rufolineatus
     7/7 Septifer zeteki
237 Species in Mytilidae 

(Extraits de WoRMS de octobre 2025)
NB: status "accepted" et "extant, not fossile-only"