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Révision du groupe Glabella mozambicana Boyer, 2014 dans le nord-Mozambique
Boyer, F.; Rosado, J.; Gori, S. (2018). Révision du groupe Glabella mozambicana Boyer, 2014 dans le nord-Mozambique. Xenophora taxonomy 22: 25-32
In: Xenophora taxonomy. Association Française de Conchyliologie - Xenophora: Paris. ISSN 2271-0906
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| Auteurs | | Top |
- Boyer, F.
- Rosado, J.
- Gori, S.
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| Abstract |
A group composed of two affine species of large sized Glabella is recognized along the northern Mozambique area: G. mozambicana Boyer, 2014 and G. macua sp. nov. G. mozambicana is only known through two forms: its typical form found in the Fernao Veloso Bay and the vicinity of Nacala (Nampula Province), where it is collected on open sandy bottoms from 2 to 10 m, and a northern form living in the Pemba area (Cabo Delgado Province), where it is collected in the same habitat from intertidal to 12 m. G. macua is collected in a mixed environment, made of sandy pockets spread among sponges and softcora l formations on hard floor, from the llha Mozambique area (Nampula Province) by 18-23 m of depth, up to the Quirimbas Archipelago, located north from Pemba, by 18-20 m. The typical form of G. mozambicana and its northern form both appear to be strongly homogeneous, and are distinguishable from each other by several constant features which may reflect a simple geographical variation. Pen ding further study of the animal chromatism for the population from Pemba, it is considered as conspecific with the population from Fernao Veloso/Nacala. Due to similarities displayed in the decoration pattern of the shells, the population of G. mozambicana from Pemba seems to derive more directly from G. macua than the typical population of G. mozambicana, this point suggesting that the split between the lineage from the mixed bottoms and the lineage from the open soft bottoms probably occured in the far-north of the mozambican coasts. |
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