1. species: Sphaerolaimus gracilis de Man, 1876

    Taxon group: roundworm (Nematoda)

    Sphaerolaimus gracilis de Man, 1876
    Sphaerolaimus gracilis

  2. species: Amynthas gracilis (Kinberg, 1867)

    Taxon group: annelid

    Amynthas gracilis
    Amynthas gracilis (Kinberg, 1867)

  3. species: Halalaimus gracilis De Man, 1888

    Taxon group: roundworm (Nematoda)

    Halalaimus gracilis
    Halalaimus gracilis De Man, 1888

  4. species: Tobrilus gracilis (Bastian, 1865)

    Taxon group: roundworm (Nematoda)

    Tobrilus gracilis
    Tobrilus gracilis (Bastian, 1865)

  5. species: Bastiania gracilis De Man, 1876

    Bastiania gracilis
    Bastiania gracilis De Man, 1876

  6. species: Cyatholaimus gracilis (Eberth, 1863)

    Taxon group: roundworm (Nematoda)

    Cyatholaimus gracilis (Eberth, 1863)
    Cyatholaimus gracilis

  7. species: Hapaloderes gracilis Zelinka, 1928

    Taxon group: mud dragon (Kinorhyncha)

    Hapaloderes gracilis
    Hapaloderes gracilis Zelinka, 1928

  8. species: Urnatella gracilis Leidy, 1851

    Taxon group: entoproct

    Urnatella gracilis Leidy, 1851
    Urnatella gracilis

  9. species: Gracilentulus gracilis (Berlese, 1908)

    Taxon group: proturan

    Gracilentulus gracilis
    Gracilentulus gracilis (Berlese, 1908)

  10. species: Plagiospora gracilis Kuckuck, 1897

    Taxon group: alga

    Plagiospora gracilis
    Plagiospora gracilis Kuckuck, 1897