Nematodes from the Indian Ocean: description of six new species of the genus Molgolaimus Ditlevsen, 1921 (Nematoda: Desmodoridae)
1996
Muthumbi, A. | Vincx, M. (Gent Univ. (Belgium). Dept. of Morphology, Ecology and Systematics)
Six new species of the genus Molgolaimus Ditlevsen, 1921 are described from the Indian Ocean. Molgolaimus abyssorum n.sp. is characterised by a small body (L = 287-370 micrometre), amphids close to the anterior end (2-3 micrometre behind the anterior end), short (2 x abd) curved spicules and absence of pre-cloacal supplements. Molgolaimus tyroi n.sp. is characterised by a small body size (L = 225-290 micrometre), amphids close to the anterior end (2 micrometre behind anterior), long thin spicules curved twice and one or two pre-cloacal supplements. Molgolaimus gazii n. sp. is characterised by narrow anterior end with the head region slightly offset, wide amphids (70 per cent cbd) located at 2.6-3.0 x hd behind the anterior end, thin, long spicules with anterior one third parallel to the body axis and posterior two thirds of its length curved. Molgolaimus sabakii n. sp. is characterised by narrow anterior end, sexual dimorphism in size of amphids (wide amphids in males (70-80 per cent cbd), smaller ones in females (55 per cent cbd)) located at 17-20 micrometre (3.4-4.0 x hd) behind the anterior end, thin, long spicules which have anterior half parallel to the body axis and the posterior half curved and two ventral pre-cloacal supplements located within the spicule region. Molgolaimus kiwayui n. sp. is characterised by head region off set by a constriction, amphids located close to anterior end (1.0-1.5 x hd behind the anterior end), short slightly curved spicules with a capitulum. Molgolaimus tanai n. sp. is characterised by cephalic setae (2-3 micrometre long) located at 5-6 micrometre behind the anterior end, amphids located at 7-9 micrometre behind the anterior end, long slender spicules (3.8-5.1 abd long) and a complex gubernaculum with lateral pieces. A key to the species of Molgolaimus is provided.
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