Morphological characterization of two new species of Dicontophrya (Ciliophora: Astomatia: Contophryidae) commensal of earthworms (Oligochaeta: Annelida) of ebebda and nkolbikogo (Cameroon) - Archive ouverte HAL Accéder directement au contenu
Autre Publication Scientifique Année : 2015

Morphological characterization of two new species of Dicontophrya (Ciliophora: Astomatia: Contophryidae) commensal of earthworms (Oligochaeta: Annelida) of ebebda and nkolbikogo (Cameroon)

Paul Alain Nana
  • Fonction : Auteur
Pierre Ngassam
  • Fonction : Auteur
Geneviève Bricheux
Philippe Bouchard
Bernard Viguès
  • Fonction : Auteur
Télesphore Sime-Ngando

Résumé

Two new species of astomatous ciliates (Dicontophrya minus n. sp. and Dicontophrya ebebdaensis n. sp.) endocommensal of Glossoscolecidae earthworms pertaining to the genus Alma are described using lightmicroscopy and a combination of staining techniques (pyridinated ammoniacal siver nitrate and DAPI). Studies reveal the existence of two distinct morphological types as evidence of morphological diversification within the genus Dicontophrya de Puytorac and Dragesco, 1969. In the first morphological type represented by Dicontophrya minus n. sp., the cell is ovoid (90 x 125 – 35 x 115 µm) with a ribbon like axial macronucleus flanked with a relatively big micronucleus (6.2 µm in diameter). In the second morphological type (Dicontophrya ebebdaensis n. sp.), the cell is elongated and wormlike (180 x 215 – 35 x 50 µm) with a nuclear apparatus composed of a long ribbon shape macronucleus (171.1 µm), bearing in its posterior half a globulous micronucleus. In the two cases cells bear in the anterior end a depression in which lodges a skeletal apparatus build in the same plan of organization (a modified V shaped skeletal branch bearing about 7 skeletal fibers) that characterize the genus

Domaines

Protistologie

Dates et versions

hal-01392328 , version 1 (04-11-2016)

Identifiants

Citer

Zéphyrin Fokam, Paul Alain Nana, Pierre Ngassam, Geneviève Bricheux, Philippe Bouchard, et al.. Morphological characterization of two new species of Dicontophrya (Ciliophora: Astomatia: Contophryidae) commensal of earthworms (Oligochaeta: Annelida) of ebebda and nkolbikogo (Cameroon). 2015, pp.49 - 57. ⟨10.12692/ijb/7.1.49-57⟩. ⟨hal-01392328⟩
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