Reproduction in the daughter sporocyst of Cercaria bucephalopsis haimeana (Lacaze-Duthiers, 1854) (Bucephalidae) and Cercaria dichotoma Lebour, 1911 (non Müller) (Gymnophallidae)

The germ-cell cycle and method of reproduction in the daughter sporocysts of the bucephalid Cercaria bucephalopsis haimeana (Lacaze-Duthiers, 1854) and the gymnophallid Cercaria dichotoma Lebour, 1911 (non Müller) from the edible cockle, Cardium edule L., have been investigated by the examination of stained sections. A review is given of the principal interpretative theories which attempt to explain the nature of the reproduction and the homology of the germinal sacs of the Digenea. It is suggested that the life-cycle includes a cyclic alternation of homologous generations. Of these, the miracidium/mother-sporocyst and the daughter germinal-sac generations usually reproduce by apomictic parthenogenesis but polyembryony may also occur secondarily in some species. We are very grateful to Dr Gwendolen Rees and Professor E. W. Knight-Jones for considerable help with the manuscript.

[1]  J. Richards,et al.  The ultrastructure of the daughter sporocyst of Cercaria bucephalopsis haimaena Lacaze-Duthiers, 1854 (Digenea: Bucephalidae) from the edible cockle, Cardium edule L. , 1966, Parasitology.

[2]  A. Taylor,et al.  The evolution of parasitic platyhelminths. , 1965 .

[3]  O. M. Ivanova-Kazas.  [POLYEMBRYONY IN ANIMALS]. , 1965, Arkhiv anatomii, gistologii i embriologii.

[4]  B. James.  The life cycle of Parvatrema homoeotecnum sp.nov.(Trematoda: Digenea) and a review of the family Gymnophallidae Morozov, 1955 , 1964, Parasitology.

[5]  G. Lapage.  The Parasites of Man , 1886, Nature.

[6]  B. James.  A New Cercaria of the Subfamily Gymnophallmae (Trematoda: Digenea) developing in a unique ‘Parthenita’ in Littorina saxatilis (Olivi) , 1960, Nature.

[7]  A. E. Woodhead.  The germ cell cycle in the trematode family Brachylaemidae. , 1955 .

[8]  Premvati.  Cercaría multiplícata n.sp. from the snail Melanoides tuberculatus (Müller). , 1955 .

[9]  A. E. Woodhead.  A study of the miracidium of GigantoWharzta huroneruis Najim, 1950, with special reference to the germinal cells. , 1955 .

[10]  Lloyd A. Le Zotte.  Studies on marine digenetic trematodes of Puerto Rico: the family Bivesiculidae, its biology and affinities. , 1954 .

[11]  W. W. Cort,et al.  Germinal development in the sporocysts and rediae of the digenetic trematodes. , 1954, Experimental parasitology.

[12]  R. M. Cable.  Studies on marine digenetic trematodes of Puerto Rico; the life cycle in the family Haplosplanchnidae. , 1954, The Journal of parasitology.

[13]  A. E. Woodhead.  Bisexual reproduction in the mother sporocyst of Paragonimus kellicotti (Trematoda). , 1953 .

[14]  Verne B. Kniskern.  Studies on the trematode family Bucephalidae Poche, 1907, Part II. The life history of Rhipidocotyle septpapillata Krull, 1934. , 1952 .

[15]  H. Ciordia.  Cytological Studies of the Germ Cell Cycle of the Trematode Family Bucephalidae , 1952 .

[16]  J. Baer.  Ecology of Animal Parasites. , 1951 .

[17]  E. Suomalainen.  Parthenogenesis in Animals , 1950 .

[18]  R. B. Short,et al.  Hermaphrodites in a Puerto Rican strain of Schistosoma mansoni. , 1948, The Journal of parasitology.

[19]  R. B. Short.  Infective uniparental miracidia of Schistosomatium douthitti (Trematoda : Schistosomatidae. , 1948 .

[20]  W. W. Cort.  The Germ Cell Cycle in the Digenetic Trematodes , 1944, The Quarterly review of biology.

[21]  G. Rees.  Studies on the germ cell cycle of the digenetic trematode Parorchis acanthus Nicoll , 1939, Parasitology.

[22]  Pin-dji Chen.  The Germ Cell Cycle in the Trematode, Paragonimus kellicotti Ward , 1937 .

[23]  A. E. Woodhead.  The germ cell cycle in Trematodes , 1932 .

[24]  A. E. Woodhead.  The Germ Cell Cycle in the Trematode Family Bucephalidae , 1931 .

[25]  F. G. Brooks.  Studies on the Germ Cell Cycle of Trematodes. , 1930 .

[26]  F. G. Brooks.  THE GERM CELL CYCLE OF THE DIGENETIC TREMATODES. , 1928, Science.

[27]  J. Patterson.  Polyembryony in Animals , 1927, The Quarterly Review of Biology.

[28]  E. Linton.  SPOROCYSTS IN AN ANNELID , 1915 .