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A chromosome study of the tapeworm Bathybothrium rectangulum (Bloch, 1782) (Cestoda: Pseudophyllidea)

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The diploid number 2n = 18 was revealed in Bathybothrium rectangulum, a specific parasite of barbels (Barbus spp.). All chromosome pairs were biarmed (pairs 1, 4, 7, 8, and 9 were metacentric; pairs 2, 3, and 6 were meta-submetacentric; and pair 5 was submetacentric) and small (from 1.49 to 2.95 μm). The C-banding method revealed pericentromeric heterochromatin in pairs 1, 3, 5, and 7; distinct C-bands in pairs 2, 4, 8, and 9; and a slight band in short arms of pairs 1 and 6. The karyotype of B. rectangulum is discussed with respect to the irresolute taxonomic position of B. rectangulum within the Pseudophyllidea.

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Received: 4 June 1998 / Accepted: 29 September 1998

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Špakulová, M., Scholz, T. A chromosome study of the tapeworm Bathybothrium rectangulum (Bloch, 1782) (Cestoda: Pseudophyllidea). Parasitol Res 85, 270–273 (1999).

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  • Chromosome Pair
  • Taxonomic Position
  • Diploid Number
  • Chromosome Study
  • Pericentromeric Heterochromatin