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Morphology of the trunk of Corynosoma hamanni (Acanthocephala: Polymorphidae)
Holloway, JR., H.L.; Nickol, B.B. (1970). Morphology of the trunk of Corynosoma hamanni (Acanthocephala: Polymorphidae). J. Morphol. (1931) 130(2): 151-162
In: Journal of Morphology (1931). The Wistar Institute Press/Wiley: New York. ISSN 0362-2525, more
Peer reviewed article

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Keywords
    Acanthocephala [WoRMS]; Corynosoma hamanni Linstow, 1892 [WoRMS]; Polymorphidae Meyer, 1931 [WoRMS]; Marine

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  • Holloway, JR., H.L.
  • Nickol, B.B.

Abstract
    Morphological study of Corynosoma hamanni (Linstow, 1892) was continued with the intention of presenting a morphological description of a single, well defined species.
    Sexual dimorphism is exhibited in body size, males being larger, and in body spination. Trunk spines are arranged in a pattern similar to that of Corynosoma semerme and do not extend onto the bursa as reported in the original description of C. hamanni.
    Two testes, located side by side, are followed by six cement glands arranged in two groups of three glands each. One group is behind each testis. Cement ducts from glands on the right side cross over Saefftigen's pouch and join to form a reservoir on the left side; ducts from cement glands on the left side fuse forming a second reservoir. The two cement reservoirs unite before emptying into the ejaculatory duct. The bursa possesses rays on its outer wall and numerous, well-developed papillae in the muscular cap.
    In females, a ruptured genital ligament sac is attached partially on the dorsal wall of the uterine bell and partially on a column of six cells projecting from the bell's base into its lumen. Postericrly the dorsal wall of the bell has two protruding pockets behind which occur ten cells composing the selector apparatus. Dorsal openings into the pseudocoelom occur on either side of the uterine bell. Two muscular tubes conduct eggs into the uterus. Female C. hamanni frequently form genital vestibules in which the genital pore occurs along the dorsal wall and not, as reported for some species, at the anterior tip.
    Eggs of C. hamanni possess four membranes rather than the previously reported three.

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