A complex of species related to Paradiscogaster glebulae (Digenea: Faustulidae) in chaetodontid fishes (Teleostei: Perciformes) of the Great Barrier Reef. Issue 5 (October 2015)

• Record Type: Journal Article
• Authors: Diaz, Pablo E.; Bray, Rodney A.; Cutmore, Scott C.; Ward, Selina; Cribb, Thomas H.
• Is Part Of: Parasitology international. Volume 64:Issue 5(2015:Oct.)
• Page Start: 421
• Page End: 428
• Publication Date: 2015-10
• Subjects: Parasitology -- Periodicals; Parasites -- Periodicals; Parasitic Diseases -- Periodicals; Parasitology -- Periodicals; Parasitologie -- Périodiques; 571.99905
• DOI: 10.1016/j.parint.2015.06.004
• Languages: English
• ISSNs: 1383-5769

Abstract

<abstract abstract-type="author" id="ab0005"> <title id="st0005">Abstract</title> <sec> <p id="sp0005">A total of 1523 individuals of 34 species of chaetodontids from the Great Barrier Reef were examined for faustulid trematodes. Specimens resembling <italic>Paradiscogaster glebulae</italic> Bray, Cribb & Barker, 1994 were found in nine chaetodontid species at three localities. These specimens are shown, on the basis of combined morphological and molecular analyses, to comprise a complex of morphologically similar and partly cryptic species. The complex may comprise as many as six distinct species of which three are resolved here. The true <italic>P</italic>. <italic>glebulae</italic> is identified in <italic>Chaetodon ornatissimus</italic> Cuvier, 1831, <italic>Chaetodon aureofasciatus</italic> Macleay, 1878, <italic>Chaetodon plebeius</italic> Cuvier, 1831, <italic>Chaetodon rainfordi</italic> McCulloch, 1923 and <italic>Chaetodon speculum</italic> Cuvier, 1831. Two new species are described, <italic>Paradiscogaster munozae</italic> n. sp. from <italic>Heniochus varius</italic> (Cuvier, 1829), <italic>Heniochus chrysostomus</italic> Cuvier, 1831 and <italic>Chaetodon citrinellus</italic> Cuvier, 1831 and <italic>Paradiscogaster melendezi</italic> n. sp. from <italic>Chaetodon kleinii</italic> Bloch, 1790. In terms of morphology the three species differ most clearly in the development of the appendages on the ventral sucker. The three species differ at 3–6 consistent bp of ITS2 rDNA. The host-specificity of the three species differs strikingly. <italic>P. melendezi</italic> n. sp. infects just one fish species, <italic>P</italic>. <italic>glebulae</italic> infects species of only one clade of <italic>Chaetodon</italic>, and <italic>P</italic>. <italic>munozae</italic> n. sp. infects quite unrelated species. The basis of this unusual pattern of host-specificity requires further exploration. Two of the species recognised here, <italic>P. glebulae</italic> and <italic>P. munozae</italic> n. sp., showed apparent intra-individual variation in the ITS2 rDNA sequences as demonstrated by clear, replicated double peaks in the electropherograms.</p> </sec> </abstract>