The Calicotyle conundrum: do molecules reveal more than morphology?

Chisholm, Leslie A., Whittington, Ian D., Morgan, Jess A. T. and Adlard, Robert D. (2001) The Calicotyle conundrum: do molecules reveal more than morphology?. Systematic Parasitology, 49 1: 81-87. doi:10.1023/A:1010629022955

Author Chisholm, Leslie A.
Whittington, Ian D.
Morgan, Jess A. T.
Adlard, Robert D.
Title The Calicotyle conundrum: do molecules reveal more than morphology?
Journal name Systematic Parasitology   Check publisher's open access policy
ISSN 0165-5752
Publication date 2001-01
Sub-type Article (original research)
DOI 10.1023/A:1010629022955
Volume 49
Issue 1
Start page 81
End page 87
Total pages 7
Place of publication The Netherlands
Publisher Kluwer Academic
Collection year 2001
Language eng
Subject C1
300508 Parasitology
780105 Biological sciences
Abstract Partial large subunit 28S rDNA sequences were obtained for specimens of Calicotyle (Monogenea: Monocotylidae) from eight different host species distributed worldwide to test the validity of some species and to address the question of host-specificity in others. Sequences obtained for Calicotyle specimens identified as C. kroyeri based on morphological methods from the type-host Raja radiata (Rajidae) and an additional host R. clavata, both from the North Sea, were identical. However, 'C. kroyeri' from the cloaca of R. naevus from Tunisia, Raja sp. A from Tasmania and R. radula from Tunisia differed from C. kroyeri from R. radiata by five (0.51%), 21 (2.13%) and 39 (3.96%) base pairs, respectively, over 984 sites. Therefore, it is likely that the specimens from Raja sp. A, R. radula and perhaps even from R. naevus are not C. kroyeri. Molecular results determined that the calicotylines from the cloaca of Urolophus cruciatus and U. paucimaculatus (Urolophidae) from southern Tasmania identified previously as C. urolophi are indeed identical. Large subunit 28S rDNA sequences of C. palombi and C. stossichi collected from the cloaca and rectal gland, respectively of Mustelus mustelus (Triakidae) from the coast of Tunisia differ sufficiently for these calicotylines to be considered separate and valid species. Our results indicate that some species of Calicotyle are not strictly host-specific, but that C. kroyeri may not be as widely distributed in rajids as was believed previously. Calicotyle specimens from rajids must be re-examined critically to determine whether there are morphological differences indicative of specific differences that may have been overlooked previously.
Keyword Parasitology
Lutjanus-carponotatus Perciformes
N-sp Monogenea
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
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Created: Tue, 14 Aug 2007, 15:27:45 EST