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Lebetus guilleti (Teleostei: Gobiidae) in the northern Adriatic sea: first record and details on the species' morphology

The occurrence of Lebetus guilleti (Le Danois, 1913) is described for the first time from the Northern Adriatic Sea, Croatian coastal waters. Eight females and five males were collected in the Kvarner region, south of Rijeka on sandy substrates at depths betwen 6 and 13 m in 1999 and 2001. A second small population was documented photographically along the western coast of Istria, near Rovinj in May, 2002. The collected specimens were asigned to L. guilleti by the following features: small body size, specific body coloration, complete losss of the head lateral line canals, presence of suborbital row a, limited number of head sensoryy papillae with two interorbital rows, elongate dorsal fin rays and meristic values of D2I/7-8, A I/4-5, P 14-15, LL 24-26 and VC 25-26. This recent finding enables a more detailed description of the morphology of this little known species as given below. Morphometrics, meristic values, lateral line system, coloration and skeletal features as well as ecology are described and compared with related gobiid genera.

Gobiidae; Lebetus guilleti; Mediterranean; northern Adriatic Sea

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