Capsaloides marielenae ( Lamothe­Argumedo, 1968 ) Lamothe­Argumedo, 1996

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 : 14-15

Capsaloides marielenae ( Lamothe­Argumedo, 1968) Lamothe­Argumedo, 1996 ( Figs 3 B, 4C)

Synonyms: Caballerocotyla marielenae Lamothe­Argumedo, 1968 ; Capsaloides mariaelenae ( Lamothe­Argumedo, 1968) Lamothe­Argumedo, 1996 .

Type­host: Istiophorus platypterus (Shaw, 1792) (Istiophoridae) . The type­host was originally recorded as Istiophorus greyi Jordan & Evermann, 1926 which is now considered a synonym of I. platypterus (see Froese & Pauly 2005).

Type­locality: Puerto Angel, Oaxaca, Mexico [Pacific Ocean].

Site: Gills.

Specimens examined: Two paratypes (CNHE 000133); 1 paratype (USNPC 75517).

Remarks

This species was originally described by Lamothe­Argumedo (1968) as a member of Caballerocotyla but was later transferred to Capsaloides by Lamothe­Argumedo (1996) because of the morphology of the haptoral accessory sclerites and the bifid posterior pair of septa. The number of cusps associated with the dorsomarginal body sclerites decrease posteriorly ( Fig. 3 B). There are 6–8 sclerties (with 5–7 cusps) in the left isolated anterior group of dorsomarginal sclerites. The right isolated group of dorsomarginal sclerites has 3 bi­ or tricuspid sclerites. Close examination of type­material revealed that the body shape, the morphology of the haptoral accessory sclerites ( Fig. 4 C) and the dorsomarginal body sclerites ( Fig. 3 B), which end in the posterior third of the body, are very similar to those of C. istiophori (described from the same host species off Hawaii), C. perugiai and C. tetrapteri . We therefore consider C. marielenae a synonym of C. perugiai (see also Remarks under C. istiophori , C. perugiai and C. tetrapteri ). Lamothe­Argumedo (1968) described the egg as rhomboidal with an appendage present on 1 pole.

Figures

FIGURE 3. Variation in the morphology of the dorsomarginal body sclerites of Capsaloides perugiai and those species (C. istiophori, C. marielenae and C. tetrapteri) newly synonymised with C. perugiai (present study). Note that the number of cusps associated with the crown­shaped sclerite decrease towards the posterior body region. A. C. istiophori, drawn from USNPC 63598. B. C. marielenae, drawn from CNHE 0 0 0 133. C. C. perugiai, redrawn from Setti (1898). D. C. tetrapteri, drawn from USNPC 63600. Scale bar: 10 m.

FIGURE 4. Haptoral accessory sclerites of Capsaloides perugiai and those species newly synonymised with C. perugiai. A. C. istiophori, redrawn from Yamaguti (1968). B. C. istiophori, drawn from USNPC 63598. C. C. marielenae, drawn from CNHE 0 0 0 133. D. C. perugiai, redrawn from Setti (1898). D. C. tetrapteri, drawn from USNPC 63600. Note that the only specimen of C. istiophori deposited is large and the morphology of the accessory sclerites are slightly different (B) to that drawn by Yamaguti (1968) (see A) who based his description on 28 specimens. Scale bar: 50 m.