Diceratocephala boschmai (Platyhelminthes: Temnocephalida) from crayfish farms in Thailand: investigation of the topographic surface and analysis of 18S ribosomal DNA sequences

In commercial astaciculture, Diceratocephala boschmai is known to be an ectosymbiont temnocephalid that is widely distributed on Cherax spp., freshwater crayfish native to Australia. This study makes the first report of D. boschmai in samples collected from C. destructor from crayfish farms in Thailand. A description of its internal anatomy is given, and its topographic surface is described using scanning electron microscopy. The phylogeny of D. boschmai in the Rhabdocoela was analyzed for the first time based on 18S ribosomal DNA (rDNA) sequences. Based on the 18S rDNA sequences, temnocephalids, including D. boschmai, are monophyletic within Rhabdocoela. The congruence between molecular data and morphological information is discussed in the text. The findings reported in the present study add to the body of knowledge on temnocephalids.

Diceratocephala boschmai (Platyhelminthes: Temnocephalida) from crayfish farms in Thailand: investigation of the topographic surface and analysis of 18S ribosomal DNA sequences

In commercial astaciculture, Diceratocephala boschmai is known to be an ectosymbiont temnocephalid that is widely distributed on Cherax spp., freshwater crayfish native to Australia. This study makes the first report of D. boschmai in samples collected from C. destructor from crayfish farms in Thailand. A description of its internal anatomy is given, and its topographic surface is described using scanning electron microscopy. The phylogeny of D. boschmai in the Rhabdocoela was analyzed for the first time based on 18S ribosomal DNA (rDNA) sequences. Based on the 18S rDNA sequences, temnocephalids, including D. boschmai, are monophyletic within Rhabdocoela. The congruence between molecular data and morphological information is discussed in the text. The findings reported in the present study add to the body of knowledge on temnocephalids.

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  • Ingroup Temnosewellia minor AY157183 Lockyer et al. (2003)
  • Temnocephala sp. 1 AJ012520 Littlewood et al. (1999)
  • Temnocephala sp. 2 AF051332 Baguna et al. (2001)
  • Diceratocephala boschmai KC517073 This study
  • Didymorchis sp. AY157182 Lockyer et al. (2003)
  • Castrella truncata AY775777 Willems et al. (2006)
  • Microdalyellia rossi AJ012515 Littlewood et al. (1999)
  • Mesostoma lingua AY775759 Willems et al. (2006)
  • Strongylostoma elongatum AY775771 Willems et al. (2006)
  • Castrada viridis AY775753 Willems et al. (2006)
  • Phaenocora unipunctata AY775762 Willems et al. (2006)
  • Olisthanella truncula AY775761 Willems et al. (2006)
  • Gyratrix hermaphroditus AY775739 Willems et al. (2006)
  • Polycystis naegelii AY775743 Willems et al. (2006)
  • Pseudomonocelis ophiocephala AY775735 Willems et al. (2006)
  • Diascorhynchus rubrus AJ012508 Littlewood et al. (1999)
  • Acrorhynchides robustus AY775737 Willems et al. (2006)
  • Cirrifera sopottehlersae AY775733 Willems et al. (2006)
  • Coelogynopora axi AY775734 Willems et al. (2006)
  • Paromalostomum fusculum AJ012531 Littlewood et al. (1999)
  • Haplopharynx rostratus AJ012511 Littlewood et al. (1999)
  • Geocentrophora wagini AJ012509 Littlewood et al. (1999)
  • Schizochilus caecus AJ775747 Willems et al. (2006)
  • Geocentrophora baltica AF065417 Noren and Jondelius (1999)
  • Nematoplana coelogynoporoides AJ012516 Littlewood et al. (1999)
  • Polystylophora novaehollandiae AJ270161 Littlewood et al. (2000)
  • Provortex tubiferus AJ312269 Noren and Jondelius (2002)
  • Pterastericola australis AJ012518 Littlewood et al. (1999)
  • Cheliplana cf. orthocirra AJ012507 Littlewood et al. (1999) Outgroup
  • Caenorhabditis elegans EU196001 Kiontke et al. (2007)
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  • Noren M, Jondelius U (1999). Phylogeny of the Prolecithophora (Platyhelminthes) inferred from 18S rDNA sequences. Cladistics 15: 103–112.
  • Noren M, Jondelius U (2002). The phylogenetic position of the Prolecithophora (Rhabditophora, Platyhelminthes). Zool Scr 31: 403–414.
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  • Willems WR, Wallberg A, Jondelius U, Littlewood DTJ, Backeljau T, Schockaert ER, Artois TJ (2006). Filling a gap in the phylogeny of flatworms: relationships within the Rhabdocoela
  • (Platyhelminthes), inferred from 18S ribosomal DNA sequences. Zool Scr 35: 1–17. Xylander WRE (1997). Epidermis and sensory receptors of Temnocephala minor (Plathelminthes, Rhabdocoela, Temnocephalida): an electron microscopic study. Zoomorphology 117: 147–154.
  • Younossi-Hartenstein A, Hartenstein V (2001). The embryonic development of the temnocephalid flatworms Craspedella pedum and Diceratocephala boschmai. Cell Tissue Res 304: 295–310.
Turkish Journal of Zoology-Cover
  • ISSN: 1300-0179
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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