Capsaloides sinuatus ( Goto, 1894 ) Price, 1938

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 : 17

Capsaloides sinuatus ( Goto, 1894) Price, 1938 ( Fig. 1 G)

Synonyms: Tristomum sinuatum Goto, 1894 ; Capsala sinuata ( Goto, 1894) Johnston, 1929 ; Capsaloides sinuatum ( Goto, 1894) Price, 1938 .

Type­host: Histiophorus sp. ( Istiophoridae ). Goto (1894) lists the Japanese name “kajiki” as the host of C. sinuatus . Lawler (1981) noted that with this Japanese name, the host is likely now known as Istiophorus platypterus .

Type­locality: Misaki, Japan [Pacific Ocean].

Site: Inner side of gills.

Additional record: Gills of Tetrapterus audax (Philippi, 1887) , Hawaii, USA [Pacific Ocean] (see Yamaguti 1968).

Specimens examined: Two voucher specimens (CNHE 002739).

Remarks

We were unable to locate type­material to verify the original description or the 5 specimens upon which the redescription was based (see Yamaguti 1968). The haptoral accessory sclerite ( Fig. 1 G; redrawn from Goto 1894) does not appear to be completely in profile in a flattened dorsoventral orientation. Goto (1894) described the uterus as opening into the “genital atrium” near the common genital pore but Yamaguti (1968) depicted the uterus as having a separate aperture. Goto (1894) based his description on careful observations of whole and sectioned material. Furthermore, in all other species of Capsaloides , the uterus joins the male copulatory organ canal just before the common genital pore. Therefore, it is likely that Yamaguti’s depiction of a separate uterine aperture is incorrect.

We examined 2 voucher specimens identified by Lamothe­Argumedo as C. sinuatus . These worms were collected from the gills of T. audax caught off Mazatlan, Mexico. We cannot distinguish these apparent C. sinuatus specimens from the holotype of C. cristatus . The dorsomarginal body sclerites of the 2 voucher specimens are identical to C. cristatus . Of particular note is the presence of the left anterior isolated group of dorsomarginal body sclerites (6–7 isolated sclerites with 6–10 cusps) in the 2 voucher specimens which was not described for C. sinuatus by Goto (1894). If these voucher specimens are indeed C. sinuatus , this provides further support for the synonymy of C. cristatus with C. sinuatus . However, until type­material is located or additional specimens from the type­locality are collected, we choose not to make this decision.

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.