A study of the anatomy of Watsonius (n.g.) watsoni of man, and of nineteen allied species of mammalian trematode worms of the superfamily Paramphistomoidea / by Ch. Wardell Stiles and Joseph Goldberger.

Date:
1910
Catalogue details

Licence: In copyright

Credit: A study of the anatomy of Watsonius (n.g.) watsoni of man, and of nineteen allied species of mammalian trematode worms of the superfamily Paramphistomoidea / by Ch. Wardell Stiles and Joseph Goldberger. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    Ceca end in testicular zone; body 9 to 18 mm. long; type host Bos indicus, Asia; also in Bos kerabau, Ceylon G. crumenifer (Creplin, 1847). F1SCHCEDERIUS, new genus. Generic diagnosis.—Gastrothylacinx (p. 16); Vas deferens and cephalic half of uterus chiefly or entirely in suctorial field. Testicular fields median, coincide or over- lap, zones coincide or overlap, one testis more dorsal than the other, inter or postcecal; vesicula without straight portion. Ventral pouch divides body into 3 longitudinal body segments, a dorsal segment containing uterus, and 2 ventro-lateral segments. Type species.—F. fischcederi. Asiatic. This genus, which we dedicate to Fischoeder (the well-known author who has done so much to advance our knowledge of the mammalian amphistomes), contains four very closely allied species, which may be distinguished by the following key: a1 Ceca end posttesticular, postovarian, in acetabular and fourth zone; testicular fields overlap, zones nearly coincide; body 8 to 10 mm. long; type host Paloniafrontalis, Java F. cobboldii (Poirier, 1883). a2 Ceca end pre testicular, preovarian, preacetabular: b1 Genital pore on vertex of prominent hemispherical bulging; testicular fields and zones overlap: c1 Ceca end in third zone; ovary and shell gland not intertesticular; body 10 to 20 mm. long; type host Palonia frontalis, Java; also in Bos kerabau in China, and Anoa depressicornis F. elongatus (Poirier, 1883). c2 Ceca end in fourth zone; ovary and shell gland intertesticular; body 6.4 mm. long; type host Bos kerabau, Ceylon F. fischaideri, p. 17. 62 Genital pore not on vertex of prominent hemispherical bulging; ceca end in third zone: c3 Testicular zones overlap; ventral pouch not continued posttesticular; body 6.6 to 15. 5 mm. long; type host Bos sp., Siam F. siamensis, p. 28. c4 Testicular zones coincide; ventral pouch continued posttesticular; body 6 to 7 mm. long; type host Bos kerabau, probably from Asiatic region. F. ceylonensis, p. 39. FISCHffiDERIUS FISCHCEDERI, new species. [Figs. 1 to 10.] Specific diagnosis.—Fischozderius (p. 17): Body 6.4 mm. long, 2 mm. broad, 2 mm. thick; buff color (alcohol specimen); rather conical, greatest transverse diameter near equator, greatest dorso-ventral diameter in caudal third; attenuated cephalad, and very slightly caudad; longitudinal axis somewhat curved, concavity ventrad; cephalic extremity bluntly pointed; caudal extremity blunt; dorsum convex longitudinally; venter slightly concave longitudinally; transverse sections nearly circular, but tending toward a bluntly rounded triangle, with apex ventrad, especially in equatorial region. Surface smooth except for a few blunt papillae in cephalic region and on lip of aperture of ventral pouch. Opening of ventral pouch 0.5 millimeter from cephalic margin; pouch begins with a narrow neck, which at the genital pore widens into a large cavity, extending dorsally to near genital glands, ventrally slightly farther; transverse section of aperture and neck crescentic, of the cavity rather triangular with apex ventrad. Genital pore seemingly very slightly postbifurcal on a prominent bulging. Acetabulum 1.04 mm. in diameter, terminal, slightly sunken below surface of body, with 0.5 mm. aperture directed caudad but very slightly ventrad. Mouth terminal; oral sucker 0.6 mm. long, slightly larger than esophagus; perisuctorial cavity roomy; 13893—Bull. 60—10 2