Additional Observations on the Bionomics and Life History of Gorgodera amplicava Looss, 1899 (Trematoda: Gorgoderidae)

Goodchild, Chauncey G.

doi:10.2307/3273606

Cited by 36 publications

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“…Life cycles are not known for P. brevicaecum, P. inecoli, P. lacustri and P. umblae, but there are some notes that cercariae of P. umblae develop in sphaeriid bivalves (Butorina et al 2008). Life cycles characterized by cystocercous cercariae developing in sphaeriid bivalves have also been linked to species of Gorgodera Looss, 1899 and Gorgoderina Looss, 1902 (Sinitsin 1905;Rankin 1939;Goodchild 1948;Lees 1953). In the molecular phylogenies, species of Gorgoderina and Gorgodera cluster together with phyllodistomes possessing cystocercous cercariae and are most closely related to P. magnificum.…”

Section: Discussionmentioning

confidence: 99%

European Phyllodistomum (Digenea, Gorgoderidae) and phylogenetic affinities of Cercaria duplicata based on rDNA and karyotypes

et al. 2014

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Petkevi ci ut_ e, R., Stun z_ enas, V., Stanevi ci ut_ e, G., Zhokhov, A.E. (2015). European Phyllodistomum (Digenea, Gorgoderidae) and phylogenetic affinities of Cercaria duplicata based on rDNA and karyotypes. 44,[191][192][193][194][195][196][197][198][199][200][201][202] Genetic markers of some European Gorgoderidae species, including potential adults of Cercaria duplicata, were obtained and used to clarify phylogenetic affinities within the genus Phyllodistomum and to verify conflicting data existing on their life cycles. Molecular data and karyotype, 2n = 18, provide further support for ascription of C. duplicata to the Gorgoderinae. Sequences of C. duplicata form a robustly supported major clade, phylogenetically distinct from other known gorgoderid species in both ITS2-and 28S-based phylogenetic trees. The molecular data revealed no match between C. duplicata and any species of Phyllodistomum, including adults found in the experimental studies. One of them, P. elongatum, showed no differences from type species P. folium. Other, P. angulatum, forms a robustly supported clade, which is closely related to P. macrocotyle clade in all phylogenetic trees. This study supports the concept that only P. macrocotyle is a parasite of Dreissena polymorpha among the phyllodistomes and life cycle described for the type species P. folium by Sinitsin (1905) can apparently be discounted. Previously reported low host specificity of P. folium was justified. Adults of P. folium were detected in eight teleost species from five families and four orders. Cystocercous cercariae of P. folium were recorded in sphaeriid bivalves of the genus Sphaerium and Pisidium. According to our molecular data, P. simile, parasite of bullhead, must be regarded as synonym of P. folium. Phyllodistomum umblae is most closely related to P. folium in the all phylogenetic analyses. Molecular phylogenies support a presumption that Phyllodistomum species with cystocercous cercariae developing in sphaeriid bivalves should be regarded as Phyllodistomum sensu stricto. The results reveal a clear need for reconsideration of the knowledge on gorgoderid life cycles based on experimental studies and re-evaluation of the validity of some nominal Phyllodistomum species. Corresponding author: Romualda Petkevi ci ut_ e,

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Section: Discussionmentioning

confidence: 99%

European Phyllodistomum (Digenea, Gorgoderidae) and phylogenetic affinities of Cercaria duplicata based on rDNA and karyotypes

et al. 2014

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“…However, with P. umblae this method was found not to prevent contraction or curling of the worms (vide Mendheim 1939). The Looss' shaking method of fixation allowed more contraction than the cover glass pressure method employed by Goodchild (1948) on Gorgoderina amplicava Looss, 1899.…”

Section: Discussionmentioning

confidence: 99%

Morphology of adult Phyllodistomurn umblae (Fabricius) (Platyhelminthes, Gorgoderidae): the effect of preparation, killing and fixation procedures

BAKKE

1988

Zoologica Scripta

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Bakke, T. A . 1988. Morphology o f adult Phyllodistomurn umblae (Fabricius) (Platyhelminthes, Gorgoderidac): the effect of preparation. killing and fixation procedures.-Zoo/. Scr. 17: 1-13. Twenty two different handling techniques for determining the morphology of Phyllodislornum umblae recovered from the Arctic char, Sulvelinus alpinus, in Norway are examined. In some procedurcs both hot and cold fixation were used. Examples of different methods are illustrated by photographs. In addition, the natural morphological variability of P . umhlue is demonstrated based on specimens from different hosts and localities in Norway and Sweden. The treatment procedures fall within four main groups: ( I ) heat fixation, (2) cold fixation, (3) enaesthetization (physical, chemical) and (4) fixation under pressure. It is concluded that only methods which givc stretching (and swelling) are passable if acceptable specimen, tor rneasurcment and descriptions are to be obtained. This is due to the obscurity of important characters in fluke bodies which are often curled or contracted whcn 'naturally displayed' on slides. The acceptable methods for gorgoderid taxonomy based on gross morphology in total mounts are: ( I ) heat fixation (based 011 formalin, alcohol and glacial acetic acid), (2) cold fixation (based on glacial acetic acid or Berland's fluid) and (3) anaesthctization (based on heating or freczing in saline o r chemical relaxation). The recommended methods arc: ( I ) 10% hot buffcrcd formalin-saline. if heating facilities are available, or, if not, (2) Berland's fluid. Tor A. Bakke, Zoological Museum,

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“…Cercarial development in P. staffordi is similar to that observed by Goodchild (1948) in Gorgodera amplicava and by Thomas (1958b) in simile. The following observations and measurements were made on ex perimentally developed cercariae while still living within the daughter sporocysts or shortly after removal.…”

Section: Development Of Cercariaesupporting

confidence: 66%

“…The two flame cells seen in a miracidium remain unaltered in oneweek-old mother sporocysts, except for a slight increase in size. In older mother sporocysts, however, they develop into large cells of the semilunar type, similar to those in sporocysts of Gorgodera amplicava and in sporocysts producing Gercaria macrocerca as described by Goodchild (1948) and Vickers (1940) respectively. The shape of the ciliated portion of the miracidial type flame cell resembles an equilateral tri angle.…”

Section: Experimental Infectionsmentioning

confidence: 97%

The life history and host-parasite relationships of Phyllodistomum staffordi (Trematoda: Gorgoderidae)

Waffle

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Additional Observations on the Bionomics and Life History of Gorgodera amplicava Looss, 1899 (Trematoda: Gorgoderidae)

Cited by 36 publications

References 0 publications

European Phyllodistomum (Digenea, Gorgoderidae) and phylogenetic affinities of Cercaria duplicata based on rDNA and karyotypes

European Phyllodistomum (Digenea, Gorgoderidae) and phylogenetic affinities of Cercaria duplicata based on rDNA and karyotypes

Morphology of adult Phyllodistomurn umblae (Fabricius) (Platyhelminthes, Gorgoderidae): the effect of preparation, killing and fixation procedures

The life history and host-parasite relationships of Phyllodistomum staffordi (Trematoda: Gorgoderidae)

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