Asexual Multiplication in Cysticercus pisifortnis (Cestoda)

Opuni, E. K.

doi:10.1017/s0022149x00021982

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…The rabbit, Oryctolagus cuniculus, was introduced from the Iberian Peninsula into the Canary Islands (Foronda et al, 2003) and has been reported as an intermediate host of T. pisiformis in Tenerife Island. Both T. parva and T. pisiformis are clearly differentiated at the morphological, biological and phylogeographical levels (Verster, 1969;Opuni, 1970;Casanova et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Taenia spp.: 18S rDNA microsatellites for molecular systematic diagnosis

et al. 2005

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The 18S rDNA gene of adult worms of Taenia parva found in Genetta genetta in the Iberian Peninsula and larval stages of T. pisiformis from the wild rabbit (Oryctolagus cuniculus) in Tenerife (Canary Islands) were amplified and sequenced. The sequences of the 18S rDNA gene of T. parva (1768 bp) and T. pisiformis (1760 bp) are reported for the first time (GenBank accession nos. AJ555167-AJ555168 and AJ555169-AJ555170, respectively). In 168 alignment positions microsatellites in the 18S rDNA of both taxa were detected for the first time (TGC in T. parva and TGCT in T. pisiformis) and differences in their sequences with different repetition numbers were observed. The use of nucleotide sequences of this gene in the resolution of systematic problems in cestodes is discussed with reference to the systematic status of Taenia spp. and mainly in human taeniids such as T. solium, T. saginata, and Asian human isolates of Taenia.

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Section: Resultsmentioning

confidence: 99%

Taenia spp.: 18S rDNA microsatellites for molecular systematic diagnosis

et al. 2005

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“…6) Uterine branches, two states: do not bifurcate (0), bifurcate (1). ** There are rare reports of asexual division in this species (Crusz, 1948;Opuni, 1970). *** Strobilocercus-a strobilated cysticercus.…”

Section: Methodsmentioning

confidence: 99%

Asexual Reproduction in Cestodes (Cyclophyllidea: Taeniidae): Ecological and Phylogenetic Influences

Moore¹,

Brooks²

1987

Evolution

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Asexual reproduction, a rare trait among cestodes in general, occurs in the "larval" (metacestode) stage of species of the family Taeniidae. The distribution of this trait among taeniid species is not consistent with an ecological hypothesis of current environmental predictability. We therefore chose a subset of the family and studied their phylogenetic relationships by Wagner parsimony analysis as a test of historical influences on asexual reproduction. We produced a consensus tree based on four 50-step trees with consistency indices of 0.38. Given these hypothetical relationships, we found that asexual reproduction either arose or was lost multiple times. Moreover, this consensus tree is incongruent with both definitive and intermediate host phylogenies, and asexual reproduction does not correlate with host transfers inferred from these phylogenies. Developmental and phylogenetic constraints on asexual reproduction therefore appear to have been minimal. Given current information, neither historical constraint nor explanations invoking adaptation based on environmental predictability can account for life-history variation in these cestodes.

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“…The close relationship postulated, however, suggests that such proliferative morphogenesis may be homologous. Interestingly, there are also reports of proliferative budding for T. pisiformis (Crusz, 1948;Opuni, 1970), placed in the T. acinonyxi subclade and as the sister species of T. serialis. In this situation, however, the transverse fission described for T. pisiformis does not appear homologous to the ontogeny of metacestodes in T. crassiceps or T. polyacantha nor to development of the coenurus and other polycephalic forms.…”

Section: Phylogeny and Morphogenesis Of Metacestodesmentioning

confidence: 99%