Summary:The syrinx of four sea gulls (Larus spp.) weighing 395-520 g were examined. The syrinx was a tracheobronchial type formed by the bronchosyringeal cartilages (cartilagines bronchosyringeales) and the tracheosyringeal cartilages (cartilagines tracheosyringeales). Five tracheosyringeal cartilages were fused completely and shaped tympanum. Bronchosyringeal cartilages were formed from 7-C shaped cartilage rings. Lateral and medial tympaniform membrane's which are important for vocalization were observed. The lateral tympaniform membrane was observed between 1 st and 2 nd cartilage rings of bronchosyringeales. Medial tympaniform membrane was placed between the pessulus and 7 th bronchosyringeal cartilages. The interbronchial ligament (ligamentum interbronchiale) connects the left and right primary bronchi at the terminal part of the medial tympaniform membrane. Foramen interbronchiale was situated between the medial tympaniform membrane, pessulus and interbronchial ligament. The tracheolateral muscle (m. tracheolateralis) was attached to the 1 st bronchosyringeal cartilages. Similarities and differences of syrinx between sea gulls and other avian species were determined in this study.Key words: Anatomy, aves, sea gull, syrinx, voice Martı'larda syrinx'in anatomik özellikleriÖzet: 395-520 gr ağırlıklarında dört adet martının kullanıldığı bu çalışmada syrinx incelendi. Syrinx'in tracheobronchial tip olduğu cartilagines bronchosyringeales ve cartilagines tracheosyringeales'ten oluştuğu belirlendi. Beş adet olan cartilago tracheosyringeales'in kaynaştığı ve tympanum'u şekillendirdiği gözlendi. Cartilago bronchosyringeales'in 7 adet olduğu ve C şeklindeki kıkırdak halkalardan oluştuğu izlendi. Sesin şekillenmesinde büyük role sahip olan membrana tympaniformis lateralis ve medialis görüldü. Membrana tympaniformis lateralis'in 1. ve 2. cartilago bronchosyringealis'ler arasında yer aldığı gözlendi. Membrana tympaniformis medialis'in, pessulus ile 7. cartilago bronchosyringealis arasında bulunduğu izlendi. Membrana tympaniformis medialis'in sona erdiği bölgede sağ ve sol bronchus primarius'u birbirine bağlayan ligamentum interbronchiale belirlendi. Membrana tympaniformis medialis, pessulus ve ligamentum interbronchiale arasında foramen interbronchiale'nin yerleştiği izlendi. M. tracheolateralis'in cartilago tracheosyringealis'e bağlandığı belirlendi. Bu çalışmada martı ile diğer kanatlı türlerinin syrinx'leri arasındaki benzerlikler ve farklılıklar ortaya konuldu.
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