Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina
Margaritaella gracilis gen. n. et sp. n. (Proteocephalidea: Proteocephalinae) found in the intestine of Callichthys callichthys (Linnaeus) from the Paraná River basin is described. The new genus is placed in the Proteocephalinae because of the medullary position of the genital organs. It differs fro...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00155683_v59_n2_p99_Arredondo http://hdl.handle.net/20.500.12110/paper_00155683_v59_n2_p99_Arredondo |
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paper:paper_00155683_v59_n2_p99_Arredondo2023-06-08T14:38:06Z Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina Callichthyidae Catfish Morphology Neotropical region Proteocephalinae Taxonomy Callichthyidae Callichthys callichthys Cestoda Eucestoda Pisces Proteocephalidea Proteocephalinae Siluriformes animal animal disease Argentina article catfish cestode cestodiasis classification fish disease histology parasitology river scanning electron microscopy ultrastructure Animals Argentina Catfishes Cestoda Cestode Infections Fish Diseases Microscopy, Electron, Scanning Rivers Margaritaella gracilis gen. n. et sp. n. (Proteocephalidea: Proteocephalinae) found in the intestine of Callichthys callichthys (Linnaeus) from the Paraná River basin is described. The new genus is placed in the Proteocephalinae because of the medullary position of the genital organs. It differs from all known genera included in the Proteocephalinae by the following combination of characters: 1) scolex with a conspicuous cluster of drop-shaped gland cells posterior to suckers; 2) strobila with a low number of proglottides, all much longer than wide; 3) testes arranged in one field, composed of two parallel rows of testes separated by the uterus; 4) ovary delicate, H-shaped, with branches slender and deeply folliculate at the edges, located at 25-35% from the posterior end; 5) uterus largely extended posterior to the ovary but not reaching the end of proglottis; and 6) vitelline follicles in two narrow lateral bands, largely extended posterior to the ovary. Scanning electron microscopy revealed three types of microtriches on the tegument surface: acicular and capiliform filitriches and gladiate spinitriches. The relative size of the ovary, a character recently used in the systematics of the proteocephalidean cestodes, was calculated for the new species and compared with other species of the group. M. gracilis is the first record of a proteocephalidean cestode parasitizing a callichthyid catfish.(c) Institute of Parasitology, Biology Centre ASCR. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00155683_v59_n2_p99_Arredondo http://hdl.handle.net/20.500.12110/paper_00155683_v59_n2_p99_Arredondo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Callichthyidae Catfish Morphology Neotropical region Proteocephalinae Taxonomy Callichthyidae Callichthys callichthys Cestoda Eucestoda Pisces Proteocephalidea Proteocephalinae Siluriformes animal animal disease Argentina article catfish cestode cestodiasis classification fish disease histology parasitology river scanning electron microscopy ultrastructure Animals Argentina Catfishes Cestoda Cestode Infections Fish Diseases Microscopy, Electron, Scanning Rivers |
| spellingShingle |
Callichthyidae Catfish Morphology Neotropical region Proteocephalinae Taxonomy Callichthyidae Callichthys callichthys Cestoda Eucestoda Pisces Proteocephalidea Proteocephalinae Siluriformes animal animal disease Argentina article catfish cestode cestodiasis classification fish disease histology parasitology river scanning electron microscopy ultrastructure Animals Argentina Catfishes Cestoda Cestode Infections Fish Diseases Microscopy, Electron, Scanning Rivers Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| topic_facet |
Callichthyidae Catfish Morphology Neotropical region Proteocephalinae Taxonomy Callichthyidae Callichthys callichthys Cestoda Eucestoda Pisces Proteocephalidea Proteocephalinae Siluriformes animal animal disease Argentina article catfish cestode cestodiasis classification fish disease histology parasitology river scanning electron microscopy ultrastructure Animals Argentina Catfishes Cestoda Cestode Infections Fish Diseases Microscopy, Electron, Scanning Rivers |
| description |
Margaritaella gracilis gen. n. et sp. n. (Proteocephalidea: Proteocephalinae) found in the intestine of Callichthys callichthys (Linnaeus) from the Paraná River basin is described. The new genus is placed in the Proteocephalinae because of the medullary position of the genital organs. It differs from all known genera included in the Proteocephalinae by the following combination of characters: 1) scolex with a conspicuous cluster of drop-shaped gland cells posterior to suckers; 2) strobila with a low number of proglottides, all much longer than wide; 3) testes arranged in one field, composed of two parallel rows of testes separated by the uterus; 4) ovary delicate, H-shaped, with branches slender and deeply folliculate at the edges, located at 25-35% from the posterior end; 5) uterus largely extended posterior to the ovary but not reaching the end of proglottis; and 6) vitelline follicles in two narrow lateral bands, largely extended posterior to the ovary. Scanning electron microscopy revealed three types of microtriches on the tegument surface: acicular and capiliform filitriches and gladiate spinitriches. The relative size of the ovary, a character recently used in the systematics of the proteocephalidean cestodes, was calculated for the new species and compared with other species of the group. M. gracilis is the first record of a proteocephalidean cestode parasitizing a callichthyid catfish.(c) Institute of Parasitology, Biology Centre ASCR. |
| title |
Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| title_short |
Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| title_full |
Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| title_fullStr |
Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| title_full_unstemmed |
Margaritaella gracilis gen. n. et sp. n. (Eucestoda: Proteocephalidea), a parasite of Callichthys callichthys (Pisces: Siluriformes) from the Paraná River Basin, Argentina |
| title_sort |
margaritaella gracilis gen. n. et sp. n. (eucestoda: proteocephalidea), a parasite of callichthys callichthys (pisces: siluriformes) from the paraná river basin, argentina |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00155683_v59_n2_p99_Arredondo http://hdl.handle.net/20.500.12110/paper_00155683_v59_n2_p99_Arredondo |
| _version_ |
1768546189529055232 |