This dataset contains the digitized treatments in Plazi based on the original journal article Barani, Hashem Khandan, Alavi-Yeganeh, Mohammad Sadegh, Ghanbarifardi, Mehdi (2025): Sillago persica sp. nov., a new sillaginid (Perciformes, Sillaginidae) from the Persian Gulf. ZooKeys 1255: 63-76, DOI: 10.3897/zookeys.1255.162247
Abstract
A new species of sillaginid fish, Sillago persica sp. nov., is described from 30 specimens collected along the southern coast of the Persian Gulf (Busher), Iran. Morphological comparisons with 15 congeneric species, including members of the S. sihama complex, show that S. persica closely resembles S. sihama in meristic counts and coloration but is clearly distinguished by a unique swim bladder morphology. The posterior sub-extensions of the anterolateral swim bladder extensions in S. persica display a complex structure comprising five broad extensions connected to the swim bladder body, a feature absent in S. sihama and other sillaginids. Additional diagnostic characters include distinct meristic, morphometric, and coloration traits. Molecular analyses of mitochondrial cytochrome c oxidase subunit I (COI) sequences corroborate this species’ distinctiveness, with phylogenetic reconstruction placing S. persica haplotypes and a previously recognized G 5 clade haplotype of the S. sihama complex in a strongly supported monophyletic clade sister to S. indica and S. suezensis. Intraspecific genetic divergence within haplotypes of silaginid species and clades of S. sihma ranged from 0.00 to 0.01 (K 2 P). The S. persica haplotypes matched the G 5 clade of S. sihama (0.01, K 2 P distance) whereas it exhibited 0.18–0.24 K 2 P divergence from haplotypes of other sillaginid species and clades of the S. sihama complex. A detailed morphological description is provided along with diagnostic illustrations.
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