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Kapsulotaenia tidswelli – an unusual cestode from the Australian goannas Varanus gouldii gouldii and V. giganteus

Published online by Cambridge University Press:  18 December 2020

R.C.A. Thompson Open the ORCID record for R.C.A. Thompson [Opens in a new window] ,
S. Keatley ,
A. Elliot  and
P.L. Clode
R.C.A. Thompson*
Affiliation:
School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia6150, Australia
S. Keatley
Affiliation:
School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia6150, Australia
A. Elliot
Affiliation:
School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia6150, Australia
P.L. Clode
Affiliation:
Centre for Microscopy, Characterisation and Analysis, and UWA School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia6009, Australia
*
Author for correspondence: R.C.A. Thompson, E-mail: a.thompson@murdoch.edu.au
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Abstract

Kapsulotaenia tidswelli is a proteocephalidean cestode that utilizes varanid lizards as definitive hosts. Fresh specimens of this cestode were observed with endogenous red pigmentation in the neck region that disappeared rapidly if specimens were not preserved in glutaraldehyde. The ultrastructural characteristics of the red pigment, which are described, suggest it is a carotenoid. Phylogenetic analysis confirmed a close relationship between K. tidswelli and other species of Kapsulotaenia for which sequence information is available. There is thus no reason to consider that the red pigmentation is because K. tidswelli is atypical, and it is proposed the carotenoids are likely to be associated with the diet of its varanid host.

Keywords

Kapsulotaenia tidswellivaranidsred pigmentationultrastructurephylogenetic analysis
Type
Short Communication
Information
Journal of Helminthology , Volume 94 , 2020 , e213
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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