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Seventeen new and known species of the familyChromadoridae are described. The genus Dichromadora is represented by five species. Dichromadora longicaudata sp.n. is characterised bya slender body and thin long tail; Dichromadoragathuai sp.n. is characterised by a blunt anteriorend, a raised lateral alae and a gubernaculum that isserrated on the posterior end; D. loiseae sp.n.is characterised by a blunt anterior end with a raisedcollar, double bulb, spicules with a poorly developedcapitulum and seven pre-cloacal supplements; D.cucullata, Lorenzen, 1973 is characterised by lateraldifferentiation of two (four?) longitudinal rows ofdots, seven pre-cloacal supplements and spicules witha rounded capitulum that is open at the tip; D.quadripapillata sp.n. is characterised by acylindrical body with an elongate tail end, two(four?) longitudinal rows of dots, anterior pharyngealregion with two pairs of setae, spicules with poorlydeveloped capitulum and four (1+3) pre-cloacalsupplements. Hypodontolaimus genus has two species. Hypodontolaimus marleenae sp. n. has short (2 µm long)outer labial and long (18 µm long) cephalic sensilla;punctated cuticle with two longitudinal rows of dots,spicules with poorly developed capitulum and eightfine pre-cloacal supplements; Hypodontolaimusaff. angelae Inglis, 1961 is characterised by threesomatic setae at the anterior pharyngeal region, alarge hollow dorsal tooth, a well-developed posteriorpharyngeal bulb and a beak-shaped capitulum. The genus Ptycholaimellus has three species.Ptycholaimellus macrodentatus Timm, 1961 ischaracterised by a blunt anterior end, papilliformouter labial and setiform (6-8 µm long) cephalicsensilla, spicules bent at the anterior end and ashort stout gubernaculum that is sharp-pointed andhooked on the posterior end Ptycholaimelluspenninae sp.n. is characterised by a blunt anteriorend, inconspicuous labial sensilla and 5 µm longcephalic sensilla, a curved spicules with poorlydeveloped capitulum and a gubernaculum that isserrated on the posterior tip Ptycholaimellusponticus Filipjev, 1922 is characterised by bluntanterior end, poorly developed vestibulum,inconspicuous labial sensilla and 3 µm long cephalicsensilla, curved spicules with poorly developed capitulum and a simple gubernaculum. Ptycholaimellus ponticus sensu Gerlach, 1951 is givena new name, P. jenseni sp. n. The genus Trochamus Boucher and Bovée, 1971 is represented by four species. Trochamus bulbosa sp. n. is characterised by a small plump body normally thicker at the mid-body especially in gravid females,annulated and punctated cuticle with a lateral differentiation that is a raised ala, prominent labial rugae, long, slender spicules and conical cylindrical tail. Trochamus complexus Boucher, 1976 is characterised by cylindrical body swollen at the middle, annulated and punctated cuticle with a raised lateral alae, faint circular amphids, small stoma,thin slender spicules and elongate cylindrical tail.Trochamus prosoporus Blome, 1985 is characterised by rather long body (>1 mm long), with a blunt anterior end and cylindrical tail end, raised lateral alae, stoma with a large dorsal tooth, curved massive spicules and a gubernaculum with sharp posterior tip. Trochamus polki sp. n. is characterised by cylindrical body with a blunt anterior end and cylindrical tail end, raised lateral alae, prominent labial rugae, open loop-shaped amphids and in female the vagina wall is very refractive. Prochromadorella Mickoletzy, 1924 has twospecies. Prochromadorella daroae sp. n. ischaracterised by a slender body attenuating on bothends, heterogeneous cuticle without lateraldifferentiation, curved spicules with a poorlydeveloped capitulum and no pre-cloacal supplements.Prochromadorella ditlevseni (de Man, 1922),Lorenzen, 1971 is characterised by a slender body,heterogeneous cuticle without lateral differentiation,thin curved spicules and five pre-cloacalsupplements. The genus Trichromadora Kreis, 1929 isre-instated and T. longicaudata Kreis, 1929 isredescribed. It is characterised by a slender body anda long tail, cuticle with lateral differentiation ofthree longitudinal rows of dots throughout the bodylength, massive spicules with a poorly developedcapitulum and five pre-cloacal supplements.