Capsaloides cornutus ( Verrill, 1875 ) 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 : 4

Capsaloides cornutus ( Verrill, 1875) Price, 1938 ( Figs 1 A, 2A)

Synonyms: Tristoma cornutum Verill, 1875 ; Capsala cornuta ( Verrill, 1875) Johnston, 1929 ; Capsaloides cornutum ( Verrill, 1875) Price, 1938 .

Type­host: Tetrapterus albidus Poey, 1860 (Istiophoridae) .

Type­locality: Block Island, Rhode Island, USA [Atlantic Ocean].

Additional records: Tetrapterus imperator (Bloch & Schneider, 1801) (Istiophoridae) , Woods Hole, Massachusetts, USA [Atlantic Ocean] (see Price 1939).

Site: Gills.

Specimens examined: Two vouchers (USNPC 35136).

Remarks

Capsaloides cornutus is the type­species of the genus. It was poorly described and not illustrated when first proposed by Verrill (1875). Verrill (1885) provided a diagrammatic figure which unfortunately does not assist with identification. Price (1939), who located the type­specimen and 2 other specimens from the same host species in the USNPC, provided a detailed description and illustrations. The haptoral accessory sclerites have a relatively narrow shaft ( Fig. 1 A). The margin of the body is sinuous and a single dorsomarginal body sclerite comprising approximately 20 cusps ( Fig. 2 A) surmounts each marginal sinuation. The left anterior isolated group of dorsomarginal body sclerites comprises 4–6 sclerites each with approximately 10 cusps. The right anterior isolated group of dorsomarginal body sclerites comprises 3 sclerites each with 7–10 cusps.

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.