596 SHORT COMMUNICATIONS J. W. SEINHORST 1): Trichotylenchus rhopalocercus (Seinhorst, 1963) n. comb. (syn. Tylencho- rhynchus rhopalocercus Seinhorst, 1963) and Tylenchorhynchus clavicauda nom. nov. (syn. T. clavicaudatus of Seinhorst, 1963). Comparison of Tylenchorhynchus rhopalocercus Seinhorst, 1963 with specimens of Trichotylen- chus falciformis Whitehead, 1959 (kindly supplied by Mr. A. de Grisse, Gent, Belgium) revealed a great resemblance between the two species. They differ in size, length of stylet and size of the dorsal oesophageal gland lobe which is much longer in the latter than in the former species. However, this gland lobe slightly overlaps the intestine in T. rhopalocercus which is therefore better placed in the genus Trichotylenchus. Mr. R. P. Esser and Miss G. Freybourg of the Division of Plant Industry, Dept. of Agriculture, Gainesville, Florida drew the author's attention to the existence of the name Tylenchorhynchus clavicaudatus (Micoletzky, 1922) Filipjev, 1936 (syn. Psilenchus clavicaudatus (Micoletzky, 1922) Thorne, 1949). The name T. clavicaudatu.r Seinhorst, 1963 is therefore a tautonym. The name T. clavicauda nom. nov. is proposed to replace it. SEINHORST, J. W. (1963). Five new Tylenchorhynchus species from West Africa, Nematologica 9, 173-180. 1) Instituut voor Plantenziektenkundig Onderzoek, Wageningen, The Netherlands. SHORT COMMUNICATIONS C. T. TAYLOR 1) : A Multiple Baermann Funnel Rack made from Standard Components. The 36-funnel rack is constructed from standard "Spur" fittings (Savage and Parsons Ltd., Watford). The frame of the rack is made from two Gondola Units (upright and foot) (Fig. 1, A) and two 90 cm spacer bars. Three 18 cm shelves, with support brackets, and three support bars are attached at suitable intervals to each side of the frame. The funnel holders, B, which slot on to the support bars, are 10 cm diameter retort stand rings with an arc of about 6 cm cut out. The stem of each ring is brazed on to a 5 mm mild steel plate, 4 cm wide, which is fashioned to a U-shape to fit firmly over the support bar; this is identical with the base of a "Spur" adjustable hook. The Baermann funnels are standard 13 cm glass funnels with the stems cut short. Nylon screens, 1 mm mesh, are attached to 10 cm diameter polypropylene rings, C, and support the milk filters used for separating nematodes from debris. 8 X 3 cm glass tubes, for collecting the nematodes from the funnels, are conveniently held in polythene test tube racks, each with 12 wells, D (Laboratory Apparatus and Glass Blowing Co., Manchester). 1) Scottish Horticultural Research Institute, Invergowrie, Dundee, Scotland. P. A. A. LOOF & A. COOMANS 1): On the development and location of the oesophageal gland nuclei in the Dorylaimina. A detailed study of Dorylaimidae, Aporcelaimidae and Nygolaimidae showed that each of these families has its own type of arrangement and development of oesophageal gland nuclei; moreover most of the genera have their own subtype. In the Nygolaimidae the nuclei of the first subventral pair (SiN) are round. In many species of Nygolaimus subg. Nygolaimus they lie shortly behind the dorsal nucleus (DN) and far from the subventral nuclei of the second pair (S2N). The species of the subgenus Paravulvus Heyns, 1968 have a very different arrangement: all nuclei lie close together, the orifice of the dorsal gland (DO) 1) Landbouwhogeschool, Wageningen, The Netherlands, and University of Gent, Belgium, respectively.
Nematologica – Brill
Published: Jan 1, 1968
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