Search results for "Corynosoma cetaceum"

showing 3 items of 3 documents

Presence of genital spines in a male Corynosoma cetaceum Johnston and Best, 1942 (Acanthocephala).

2002

We collected 83 females and 80 males of Corynosoma cetaceum from 2 common dolphins, Delphinus delphis, collected in northern Patagonia (Argentina). Worms were most similar to specimens collected in other South American localities. However, 1 male had 2 spines adjacent to the genital pore and isolated from the rest of body spines. This finding confirms the recent reassignment of C. cetaceum to Corynosoma. Absence of genital spines is suggested to be avoided as the sole criterion to exclude specimens from Corynosoma or Andracantha.

MalebiologyDolphinsAndracanthaArgentinaCetaceaDelphinus delphisAnatomyCorynosoma cetaceumbiology.organism_classificationAcanthocephalaSouth americanbiology.animalAnimalsSex organParasitologyFemaleAcanthocephalaEcology Evolution Behavior and SystematicsThe Journal of parasitology
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Constructional morphology and mode of attachment of the trunk ofCorynosoma cetaceum (Acanthocephala: Polymorphidae)

1999

Dead specimens of Corynosoma cetaceum were used to describe the trunk musculature of this species and to infer the use of the trunk as a secondary holdfast. Inferences were based on trunk muscle arrangement, changes in trunk shape, size and distribution of spines, and geometry of tegument thickness. The foretrunk of C. cetaceum is swollen and forms a spiny disk that is bent ventrally. The disk is flattened by several groups of muscles not described previously, which seem able to finely adjust the disk surface over the substratum. Disk attachment appears to be accomplished by two dorsal neck retractor muscles specialized in pulling the anchored proboscis into the foretrunk. This mechanism ha…

RetractorPolymorphidaeMorphology (linguistics)biologyProboscisAnimal Science and ZoologyViral tegumentAnatomyCorynosoma cetaceumAcanthocephalabiology.organism_classificationTrunkDevelopmental BiologyJournal of Morphology
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Corynosoma cetaceum in the stomach of Franciscanas, pontoporia blainvillei (Cetacea): an exceptional case of habitat selection by an Acanthocephalan

2001

Adult acanthocephalans are typically found in the intestine of vertebrates, where they can readily absorb nutrients. However, Corynosoma cetaceum has been frequently reported in the stomach of cetaceans from the Southern Hemisphere. The ecological significance of this habitat was investigated by examining data on number, sex ratio, maturity status, biomass, and fecundity of C. cetaceum in different parts of the digestive tract of 44 franciscanas Pontoporia blainvillei. Individual C. cetaceum occurred in the pyloric stomach (PS) and, to lesser degrees, in the duodenal ampulla (DA) and the main stomach (MS). Females outnumbered males in all chambers, although the sex ratio was closer to 1:1 i…

UNESCO::CIENCIAS DE LA VIDA::Biología animal (Zoología) ::Parasitología animalPontoporia blainvilleiStomachUNESCO::CIENCIAS DE LA VIDA:CIENCIAS DE LA VIDA::Biología animal (Zoología) ::Parasitología animal [UNESCO]CetaceaCorynosoma cetaceumCorynosoma cetaceum ; Stomach ; Pontoporia blainvillei ; Cetacea ; Habitat selection ; AcanthocephalanHabitat selectionAcanthocephalan:CIENCIAS DE LA VIDA [UNESCO]
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