Chromadoridae (Chromadorida: Nematoda) from the Indian Ocean: Description of new and known species

• Published in: Hydrobiologia 1997-03, Vol.364 (2-3), p.119-153
• Main Authors: MUTHUMBI, A. W, VINCX, M
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Invertebrates; Marine biology; Morphology; Nemathelminthia. Plathelmintha; Nematodes; Systematics. Geographical distribution; Taxonomy; Teeth
• ISSN: 0018-8158; 1573-5117
• DOI: 10.1023/a:1003109929194

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 n