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A new record of a flathead fish (Teleostei: Platycephalidae) from China based on morphological characters and DNA barcoding |
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| Authors: | Yan Qin Na Song Jianwei Zou Zhaohui Zhang Guangping Cheng Tianxiang Gao Xiumei Zhang |
| Affiliation: | 12186. The Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China 22186. Beihai Fisheries Technical Extension Station, Beihai, 536000, China 32186. The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China 42186. College of Animal Science and Technology, Guangxi University, Nanning, 530005, China 52186. Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China |
| Abstract: | A new record of Platycephalus sp.1 (sensu Nakabo, 2002) was documented based on morphological characters and DNA barcoding. We collected 174 specimens of the genus Platycephalus from Chinese coastal waters of Dongying, Qingdao, Zhoushan, and Beihai. Samples were identified as Platycephalus sp.1 morphologically. The coloration, meristic traits, and morphometric measurements are consistent with previously published records. In brief, it is an orange-brown flathead fish with dark brown spots scattered on head and body, lateral line scales 83 to 99 with one or two spine-bearing anteriormost pored scale, no yellow blotch on the caudal fin. Cytochrome oxidase I subunit (COI) gene fragments were sequenced for phylogenetic analysis. The mean evolutionary distance within the species Platycephalus sp.1 was 0.1%. Net evolutionary distances between Platycephalus sp.1 and other species of Platycephalus ranged from 10.8% to 19.7%, which is much greater than the threshold for species delimitation. The COI sequence analysis strongly supports the validity of Platyceohalus sp.1 at genetic level. |
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