Bray, Rodney A.

Cribb, Thomas H.

Hall, Kathryn A.

University of Queensland eSpace

An evolutionary hypothesis for the 
radiation of the Gyliauchenidae
Goto & Matsudaira, 1918 (Platyhelminthes: Digenea)
Kathryn A. Hall*1,2
T. H. Cribb1, R. A. Bray2 and D. T. J. Littlewood2
1. The University of Queensland, Brisbane, AUSTRALIA
2. The Natural History Museum, London, UK
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Pacific Ocean
• Distribution of 
Gyliauchenidae
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Methodology
Available data:
• 49 species characterised by morphological data 
(light microscopy, literature review)
• 19 species characterised by sequence information
(ND1 mtDNA, 28S rDNA)
Analysis:
• parsimony analysis: heuristic searches and quartet 
puzzling within PAUP* (Swofford, 1999)  
Phylogenetic correlation of gut adaptation
• gut becomes more complex through time
• hierarchy of synapomorphies for gyliauchenid clades
• heritability of characters has taxonomic implications
Phylogeny of the Acanthuroidea
after Winterbottom (1993)
Siganidae
Zanclidae
Naso
Ctenochaetus
Prionurus
Paracanthus
Acanthurus
ZebrasomaAcanthuridae
Ecological correlations
• acanthuroid fishes are predominantly herbivores 
• host gut structure broadly conserved
• extreme gut adaptations restrict opportunity for 
host-switching
• specificity to acanthuroid fishes is an ecological 
association
• gyliauchenid radiation does not necessarily involve 
co-evolution
Further testing
• further collecting in south Pacific and east 
Indian oceans
• incorporation of any new taxa into phylogenies
• host mapping
• biogeography mapping
• fine level analysis of host-parasite evolution
Acknowledgements
• Australian Research Council
• British Council (Chevening Fellowship Trust)
• The Natural History Museum:
Ms Elisabeth Herniou, Ms Julia Bartley and 
Biomedical Parasitology Unit
• Australian Society for Parasitology


Gyliauchenidae Goto & Matsudaira, 1918 (Platyhelminthes: Digenea): co-evolution, parallelisms and diverging paths

https://espace.library.uq.edu.au/view/UQ:6d66ebd/UQ6d66ebd_OA_slides.pdf

Gyliauchenidae Goto & Matsudaira, 1918 (Platyhelminthes: Digenea): co-evolution, parallelisms and diverging paths

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