Gyrodactylus rasini Lucky, 1973

Richards, G. R., Veltkamp, C. J. & Chubb, J. C., 2000, Di erentiation of Gyrodactylus bullatarudis Turnbull, 1956 and G. rasini Lucky, 1973 (Monogenea) with reassignment of Gyrodactylus bullatarudis Turnbull, 1956 sensu Harris (1986) to G. rasini, Journal of Natural History 34 (3), pp. 341-353 : 344

publication ID

https://doi.org/ 10.1080/002229300299525

DOI

https://doi.org/10.5281/zenodo.5281592

persistent identifier

https://treatment.plazi.org/id/03AB5A72-3070-FF92-8561-FAA24825F939

treatment provided by

Felipe

scientific name

Gyrodactylus rasini Lucky, 1973
status

 

Gyrodactylus rasini Lucky, 1973 View in CoL

( Figures 1 View FIG , 2 View FIG , 3A View FIG , 4A View FIG ±C, 5, 9A, B)

Synonymy: Gyrodactylus bullatarudis Turnbull, 1956 of Harris (1986).

Voucher specimens: The Natural History Museum, London (BM(NH) 1994.11.24.13 ±18).

Host: Xiphophorus helleri Ö X. maculatus hybrids imported into UK from ornamental ®sh farms in Singapore. Site: external surface, too few infected ®sh seen to give more details. A`very small’ species according to scheme of Harris (1985). Body length of moderately ¯attened, moderately contracted specimens, less than 400 m m. Anterior of the pharynx (see Kritsky, 1971) consisted of eight cells arranged in a ring which were fused to each other along their lateral borders. Thirty-seven ¯attened specimens mounted in ammonium picrate-glycerin for sclerite examination had a pharynx mean length of 41 m m (SD 5 m m) and width of 37 m m (SD 4 m m). The anterior and posterior pharyngea l bulbs were of approximatel y equal width, although the width of the posterior part was greater for most specimens. Measurements of attachment hooks and bars are given in table 1; ventral bars and marginal hooks were most distinctive (®gures 1 and 9). The ventral bar had long, slightly curved antero-lateral processes, converging towards each other apically (®gure 1). The dorsal bar had a median notch (®gure 1), though this was not always obvious. Marginal hook blade point was extended nearly level with or beyond the toe. The marginal hook blade had a pronounced bend immediately before the point (®gure 1), just visible using phase contrast, was most readily seen by SEM (®gure 2). The cirrus had one large spine with a bifurcate base at both sides (®gure 3A) and a single row of four to seven small spines (®gures 3A and 4).

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