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New records of recently described Zebrus pallaoroi (Actinopterygii: Gobiiformes: Gobiidae) with notes on its morphology, ecology, and molecular identification

The family Gobiidae represents the species-richest family of fishes in the Mediterranean Sea. However, many Mediterranean gobiid species are poorly known with just one or few species records in total. Among those species, the recently described Zebrus pallaoroi Kovačić, Šanda et Vukić, 2021 has been known only from the localities in the species description: the southern Adriatic, northern Ionian, and northern and western Aegean seas. The additional specimens of this species were collected in central and northern Adriatic Sea. The identification was confirmed by morphological and genetic methods. The morphological and preserved coloration characters were compared with the data from the limited type material and the alternative preserved coloration diagnostic character was suggested. The first data on alive and freshly dead coloration are reported. The phylogenetic analysis was performed on sequenced COI, cytochrome b, and rhodopsin genes. The analyzed molecular markers placed Z. pallaoroi in a distinct clade within Zebrus–Millerigobius group. The preference of this species for the very shallow habitat is confirmed and discussed.

Adriatic Sea, COI gene, habitat, morphology, new records, Zebrus pallaoroi

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