Osteology of Vertebral Column and Caudal Skeleton of Iranian Aphaniid Species (Teleostei: Cyprinodontiformes, Aphaniidae)
محل انتشار: مجله منابع ژنتیک، دوره: 9، شماره: 1
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 71
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شناسه ملی سند علمی:
JR_SGR-9-1_004
تاریخ نمایه سازی: 9 اسفند 1401
چکیده مقاله:
In this study, a comparative analysis of the vertebral column and the caudal skeleton of ۲۴۵ specimens of ۱۰ Aphanius and three Aphaniops species was conducted based on X-ray imaging, and interspecific variation of these characters was examined. The vertebral bending index showed that straight and almost straight vertebral columns were more common in Aphaniops than in the Aphanius species. The numbers of abdominal and caudal vertebrae, principal caudal fin rays, and principal rays supported by the hypural plate were significantly lower in Aphaniops than in Aphanius species. Those species of Aphanius which were found in higher latitudes or altitudes had more vertebrae than the remaining Aphanius species and all members of Aphaniops, revealing the role of environmental factors. The number of preural (PU) vertebrae and the width of neural and haemal spines of preural vertebrae ۲-۴ were significantly higher in Aphaniops than in the Aphanius species. The conspicuous variations detected among localities of A. arakensis highlight the importance of more profound studies on the diversity of this species. In the genus Aphaniops, ۱۷% of specimens showed a straight epural bone and ۸۳% showed a sinusoidal bone. In comparison, Aphanius species showed that ۹۱% and ۷% of specimens displayed straight and sinuous shape epural bone, respectively. Such intra-species polymorphism of the epural character state was first reported for Aphaniid species. Hence, the previously proposed synapomorphy for the genus Aphaniops based on sinusoidal epural bones may need further investigation.
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نویسندگان
Parisa Davoodi
Department of Animal Science, Faculty of Science, University of Mazandaran, Babolsar, Iran
Zeinab Gholami
Department of Earth and Environmental Sciences, Paleontology and Geobiology, Ludwig-Maximilians-Universität München, Munich, Germany
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