AMZ vol 16 (2018): pp 1-19

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Arxius de Miscel·lània Zoològica, 16 (2018): 1–19

Jouili et al. ISSN: 1698–0476

Inventory of the free–living marine nematode species from el Bibane Lagoon (Tunisia) S. Jouili, F. Semprucci, A. Nasri, I. Saidi, E. Mahmoudi, N. Essid

Jouili, S., Semprucci, F. Nasri, A., Saidi, I., Mahmoudi, E., Essid, N., 2018. Inventory of the free–living marine nematode species from el Bibane Lagoon (Tunisia). Arxius de Miscel·lània Zoològica, 16: 1–19, Doi: https://doi.org/10.32800/amz.2018.16.0001 Abstract Inventory of the free–living marine nematode species from el Bibane Lagoon (Tunisia). A detailed inventory of the free–living nematodes of Tunisia has been made for the northern part of Tunisia, but the southern part of the country is unexplored. El Bibane is the second largest lagoon in Tunisia. It is thus of high importance for future conservation actions, but little is known about its biodiversity. In this study, we identified 71 nematode species, belonging to 68 genera and 22 families. Richness was lowest in the central area of the lagoon where the highest percentages of mud and organic matter were found. The number of species detected in this study is high compared to other transitional environments in the Mediterranean basin, but lower than those reported for North Europe. Most of the species are typical of transitional environments or sediments rich in the fine fraction and detritus. The richest families were Cyatholaimidae and Chromadoridae, but the most frequently found species were Xyalidae, Linhomoeidae and Cyatholaimidae. Six of the species collected are new to science, seven are new records for Tunisian waters, and four are new for the Mediterranean basin. This study adds also important information to the biogeography of the phylum because some of the species detected here were previously known only for other geographical regions. Species that currently appear endemic to the Mediterranean Sea include Chromadorina metulata, Synonchiella edax, Paralongicyatholaimus mastigodes, Trichotheristus setifer and Metalinhomoeus numidicus. Data published through GBIF [Doi:10.15470/wuvqpg] Key words: Meiofauna, Nematoda, Transitional environments, Biogeography, Mediterranean Sea Resumen Inventario de las especies de nematodos de vida libre de la laguna de El Bibane (Túnez). Se ha realizado un inventario detallado de los nematodos de vida libre de la parte norte de Túnez, pero la parte sur del país está inexplorada. La laguna de El Bibane es la segunda más extensa de Túnez, por lo que su importancia es fundamental para el desarrollo de futuras acciones de conservación y su biodiversidad debe ser evaluada. Se encontraron 71 especies de nematodos, pertenecientes a 68 géneros y 22 familias, registrándose la menor riqueza en la zona central de la laguna, donde se concentran los porcentajes más elevados de lodo y © [2018] Copyright belongs to the authors, who license the journal Arxius de Miscel·lània Zoològica to publish the paper under a Creative Commons Attribution 3.0 License, which permits its distribution, and reproduction in any medium, provided the original authors and source, the journal Arxius de Miscel·lània Zoològica, are cited.

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