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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    GASTROTHYLACINjE, new subfamily. Subfamily DIAGNOSIS.—Gastrolhylacidx (p. 15): Body elongate, venter Htraight to concave, dorsum convex, cephalic end attenuate, rather pointed, straight, may curve slightly dorsad, caudal end slightly attenuate to rounded, usually slightly con- stricted immediately preacetabular, in transverse section more or less circular but form influenced by pouch. Ventral pouch opens slightly postoral, extending nearly or quite to acetabulum. Acetabulum relatively small, terminal to ventro-subterminal, slightly sunken, margin not raised. Genital pore without sucker. Excretory pore postvesicular or nearly so, in acetabular zone, caudad of pore of Laurer's canal. Oral sucker without evagination; esophagus without muscular thickening; ceca narrow, wavy or not wavy, long or short, end postequatorial. Male organs: Testes 2, considerably smaller than acetabulum, coarsely lobate, rarely postovarial, chiefly preovarial, postequatorial, not widely separated from acetabulum; musculosa never enormous; cirrus-pouch absent. Female organs: Ovary and shell-gland in testicular or posttesticular zone, never pre- testicular; vitellaria extend from oral sucker to acetabulum, nearer ventral pouch than body wall, more ventral than dorsal, follicles in small groups; Laurer's canal anatom- ically prevesicular, but because of curve may lie partly in vesicular zone; uterus of 2 types (see genera). Eggs: Operculated (at least in some forms). Type GEXtus.^Gastrothylax Poirier, 1883. The four genera here recognized for the subfamily Gastrothylaciwe may be distinguished by the following key : Key to genera of Gastrothylacid;e, Gastrothylacin^e. A1. Vas deferens and cephalic half of uterus in separate, right and left, largely extra- suctorial fields; uterus crosses to other side near equator of body; testicular fields separate, zones coincide; type crumeni/er Gastrothylax, p. 16. A2. Vas deferens and cephalic half of uterus chiefly or entirely in suctorial field: jB1. Testicular fields separate (lateral), zones coincide: Cl. Vesicula seminalis with a straight and a coiled portion; testes in inter, extra, and cecal areas; type wellmani Wellmanius,a p. 51. G2. Vesicula seminalis without straight portion; testes inter or postcecal; type gregarius Carmyerius, p. 50. B2. Testicular fields coincide or overlap (median), zones coincide or overlap; type elongatus Fischocderius, p. 17. GASTROTHYLAX Poirier, 1883. Generic diagnosis.—Gastrothylacinas (p. 16): Vas deferens and cephalic half of uterus in separate right and left, largely extrasuctorial fields, uterus crosses to other side near equator of body. Testicular fields separate, zones coincide and, chiefly, post cecal; ovary in intertesticular field. Cross section of ventral pouch triangular, with apex dorsad, base ventrad. Ceca end preovarian, preacetabular, in fourth zone, not wavy. Type.—G. crumenifer (Creplin, 1847). This genus is apparently Asiatic, and at present contains two spe- cies, which can be easily distinguished by the following key: Ceca end pretesticular; body 9 to 11 mm. long; type host Bos indicus. [Probably from Asia] compressus Brandes, 1898. a In general we prefer masculine endings in zoological generic names,