Ruhnke, T. R. (1993). A New Species of Clistobothrium (Cestoda: Tetraphyllidea), with an Evaluation of the Systematic Status of the Genus. The Journal of Parasitology. 79(1): 37-43.

199155

10.2307/3283274 [view]

Ruhnke, T. R.

1993

79(1): 37-43

Publication

Clistobothrium montaukensis n. sp. is described from the shortfin mako shark, Isurus oxyrinchus . Based on shared characters from the scolex and segment, Phyllobothrium tumidum is transferred to the genus Clistobothrium , and the species description is emended. The description of the type species, Clistobothrium carcharodoni , also is emended, as is the generic diagnosis. Derived characters shared by these 3 species include a dorsomedian longitudinal band of strobilar muscles, a bilobed ovary, and a dorsal L-shaped cirrus sac. The spined or mammailated egg surface of these 3 species also may be synapomorphic. Although phenetically similar, it is postulated that the foliose bothridial condition shared among members of Phyllobothrium and 2 of the species of Clistobothrium is not homologous. The cirruses of C. montaukensis n. sp. and C. carcharodoni are armed with microtriches, but this may be true for other cestodes. Reliable host reports indicate that species of Clistobothrium are restricted to sharks of the family Lamnidae (the mackerel sharks).

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