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The development of the metacercaria of Maritrema linguilla Jäg., 1908 (Digenea: Microphallidae) in the intermediate host, Ligia oceanica (L.)

  • L. R. Benjamin (a1) and B. L. James (a1)

Summary

The first two phases in the growth of Maritrema linguilla in Ligia oceanica, which occur in unencysted specimens in the pleopod sinuses, from day 0 to day 28 post-infection (p.i.), include a 3-fold increase in size, an enormous increase in the relative size of the excretory bladder, metamorphosis of papilliform extensions of the tegument into microvilli and development of single pointed spines and cystogenous gland cells. The third phase, from day 29 to day 38 p.i., following migration to the dorsal haemocoel, includes production of 3 cyst wall layers, the loss of single pointed spines and a considerable decrease in the relative size of the excretory bladder. The fourth phase from day 39 to day 42 p.i., involves a further increase in body size and the formation of digitiform spines. The fifth, sixth and final phases from day 43 to day 120 p.i. first include the completion of the last two cyst wall layers and then an increase in body size and development of the digestive, excretory and reproductive systems to almost adult dimensions but sperm, ova, vitelline globules and eggs are produced only in the final host.

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The development of the metacercaria of Maritrema linguilla Jäg., 1908 (Digenea: Microphallidae) in the intermediate host, Ligia oceanica (L.)

  • L. R. Benjamin (a1) and B. L. James (a1)

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