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Base of the evolutionary tree for Gammarida

Gammarida (1949 species)
- Gammaridira → (1054 species)
- Crangonyctidira → (895 species)
  - Crangonyctoidea → (814 species)
    - Niphargidae → (427 species)
      - Niphargus → (408 species)
      - Haploginglymus → (6 species)
      - Niphargellus → (3 species)
      - Pontoniphargus → (2 species)
      - Foroniphargus pori
      - Chaetoniphargus lubuskensis
      - Microniphargus leruthi
      - Exniphargus tzanisi
      - Niphargopsis caspary
      - Niphargobatoides lefkodemonaki
      - Carinurella paradoxa
      - Niphargobates orophobata
    - Crangonyctidae → (237 species)
      - Stygobromus → (152 species)
      - Synurella → (21 species)
      - Bactrurus → (8 species)
      - Lyurella → (2 species)
      - Crangonyx → (52 species)
      - Amurocrangonyx arsenjevi
      - Stygonyx courtneyi
    - Sternophysingidae → (8 species)
    - Paracrangonyctidae → (2 species)
      - Paracrangonyx winterbourni
      - Paracrangonyx compactus
    - Pseudocrangonyctidae → (30 species)
      - Pseudocrangonyx → (26 species)
      - Eocrangonyx → (4 species)
    - Neoniphargidae → (23 species)
      - Neoniphargus → (11 species)
      - Wesniphargus → (2 species)
      - Neocrypta → (6 species)
      - Yulia yuli
      - Tasniphargus tyleri
      - Jasptorus solepti
      - Wombeyanus botulosus
    - Austroniphargidae → (7 species)
      - Austroniphargus → (2 species)
      - Orientogidiella → (2 species)
      - Libertinia → (2 species)
      - Davidia spinicaudata
    - Perthiidae → (2 species)
      - Perthia branchialis
      - Perthia acutitelson
    - Paramelitidae → (71 species)
      - Chydaekata → (15 species)
      - Aquadulcaris → (6 species)
      - Paramelita → (19 species)
      - Antipodeus → (6 species)
      - Uroctena → (6 species)
      - Austrocrangonyx → (2 species)
      - Maarrka → (2 species)
      - Austrogammarus → (7 species)
      - Protocrangonyx fontinalis
      - Totgammarus eximius
      - Kruptus linnaei
      - Molina pleobranchos
      - Mathamelita aequicaudata
      - Pilbarus millsi
      - Hurleya kalamundae
      - Toulrabia willsi
    - Sandroidae → (3 species)
    - Uronyctus longicaudus
    - Giniphargus pulchellus
    - Chillagoe thea
    - Kotumsaria bastarensis
  - Allocrangonyctoidea → (81 species)
    - Pseudoniphargidae → (75 species)
      - Pseudoniphargus → (74 species)
      - Parapseudoniphargus baetis
    - Allocrangonyctidae → (2 species)
      - Oklahoma cave amphipod (Allocrangonyx pellucidus)
      - Central Missouri cave amphipod (Allocrangonyx hubrichti)
    - Dussartiellidae → (3 species)
      - Dussartiella → (2 species)
      - Reinhardia dimorpha
    - Crymostygius thingvallensis

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