Scientia Marina, Vol 76, No 1 (2012)

Taxonomic research on Squalus megalops (Macleay, 1881) and Squalus blainvillei (Risso, 1827) (Chondrichthyes: Squalidae) in Tunisian waters (central Mediterranean Sea)


https://doi.org/10.3989/scimar.03440.22B

Sondes Marouani
Institut National des Sciences et Technologies de la Mer, Tunisia

Raja Chaâba
Institut National des Sciences et Technologies de la Mer, Tunisia

Hasna Kadri
Institut National des Sciences et Technologies de la Mer, Tunisia

Bechir Saidi
Institut National des Sciences et Technologies de la Mer, Tunisia

Abderrahmen Bouain
Faculté des Sciences de Sfax, Tunisia

Ferruccio Maltagliati
Università di Pisa Dipartimento di Biologia Unità di Biologia Marina e Ecologia, Italy

Peter Last
CSIRO Marine and Atmospheric Research, Australia

Bernard Séret
Muséum national d’Histoire naturelle, Département Systématique et Evolution, France

Mohamed Nejmeddine Bradai
Institut National des Sciences et Technologies de la Mer, Tunisia

Abstract


Two species of spurdog of the genus Squalus occur in the Gulf of Gabès (southern Tunisia, central Mediterranean): the longnose spurdog Squalus blainvillei (Risso, 1827) and a short-snout spurdog of the Squalus megalops-cubensis group. Morphometric and meristic data as well as a genetic analyses (DNA inter-simple sequence repeat markers and molecular barcoding methods) support the assignation of this short-snout spurdog to Squalus megalops (Macleay, 1881). Squalus megalops occurs commonly in temperate and tropical Australian waters, and is also thought to occur in the eastern Atlantic, southern Indian Ocean and western North Pacific although these records need to be confirmed. Our study confirms that it occurs in the Mediterranean Sea. Populations of both S. blainvillei and S. megalops are described based on Tunisian material.

Keywords


Squalus megalops; Squalus blainvillei; taxonomy; Gulf of Gabès; Central Mediterranean

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