Capsaloides nairagi Yamaguti, 1968

Chisholm, Leslie A. & Whittington, Ian D., 2006, Revision of Capsaloides (Monogenea: Capsalidae) with a redescription of C. magnaspinosus Price, 1939 from the nasal tissue of Tetrapterus audax (Istiophoridae) collected off Nelson Bay, New South Wales, Australia, Zootaxa 1160, pp. 1-20 : 15

Capsaloides nairagi Yamaguti, 1968 ( Figs 1 E, 2E)

Type­host: Makaira sp. ( Istiophoridae ).

Type­locality: Hawaii, USA [Pacific Ocean].

Additional records: Tetrapterus angustirostris Tanaka, 1915 , Hawaii, USA [Pacific Ocean] (see Yamaguti 1968).

Site: Gills.

Specimens examined: Holotype (USNPC 63599); 2 voucher specimens (NHM 1979.9.13.55­57).

Remarks

Capsaloides nairagi is most easily distinguished from other species in the genus by a zig­zagged row (see fig. 22 of Yamaguti 1968) of closely­spaced dorsomarginal body sclerites ( Fig. 2 E) which extend to the posterior end of the body. In the holotype, the left isolated group of anterior dorsomarginal body sclerites comprises 6 sclerites each with 7– 10 cusps. The right isolated group of anterior dorsomarginal body sclerties comprises 10 sclerites, each with 3–6 cusps. The haptoral accessory sclerites ( Fig. 1 E) are large with an elongate shaft. According to Yamaguti (1968), the egg is rhomboidal with an appendage at one end.

Figures

FIGURE 1. Haptoral accessory sclerites of Capsaloides species. A. C. cornutus, drawn from USNPC 35136. B. C. cristatus, drawn from USNPC 63597. C. C. hoffmannae, drawn from CNHE 0 0 2718. D. C. magnaspinosus, drawn from USNPC 35648. E. C. nairagi, drawn from USNPC 63599. F. C. perugiai, redrawn from Setti (1898). G. C. sinuatus, redrawn from Goto (1894). Scale bar: 100 m.

FIGURE 2. Nomarksi photomicrographs of the dorsomarginal body sclerites of Capsaloides species. For consistent comparison, the sclerites were photographed at the level of the anterior border of the ovary. A. C. cornutus, from USNPC 35136. B. C. cristatus, from USNPC 63597. C. C. hoffmannae, from CNHE 002718; note that the cusps of the sclerites cannot be seen well in this unflattened specimen and the body margin appears annulated. D. C. magnaspinosus, from USNPC 35648. E. C. nairagi, from USNPC 63599; note that the sclerites are distributed in a slightly zigzagged pattern. F. C. perugiai, from USNPC 63600 (specimen originally identified as C. tetrapteri). Scale bars: 20 m.