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Supayacetus

Supayacetus
Yaşadığı dönem aralığı: 41,2-37,8 myö
Bartoniyen-Orta Eosen[1] 
Bartoniyen'den bilinen iki Peru balinası, Ocucajea pickling (üstte) ve Supayacetus muizoni (altta)
Biyolojik sınıflandırma Bu sınıflandırmayı düzenle
Âlem: Animalia
Şube: Chordata
Sınıf: Mammalia
Takım: Cetacea
Familya: †Basilosauridae
Alt familya: †Dorudontinae
Cins: †Supayacetus
Uhen vd. 2011
Tür: †S. muizoni
İkili adlandırma
†Supayacetus muizoni
Uhen vd. 2011

Supayacetus, orta Eosen döneminde Peru'da yaşamış basilosaurid balina cinsi. Cinse ait tek tür 2011'de tanımlanan Supayacetus muizoni tip türüdür.[1]

Etimoloji

Cins ismi, Supayacetus, İnka tanrısı Supay ve Latince "cetus" kelimelerinin birleşiminden oluşur. Tür ismi, Peru'nun fosil deniz memelilerini anlama konusundaki kapsamlı katkılarından dolayı Christian de Muizon'u onurlandırıyor.

Fosil buluntuları

Holotip MUSM 1465, dişler, kısmi bir vertebral kolon, kaburgalar, ön ayak elemanları ve sternumun manubriumunu içeren kısmi bir iskeletten oluşur.[1]

Supayacetus'un tip örneğinin kafatası, çoğunlukla hava şartlarından dolayı tahrip olmuştur. Sol timpanik bulla iyi korunmuştur ve keskin bir yatay omurga ile dış hatları dörtgendir. Ventral görünümde, medyan karık bülü lateral ve medial bölümlere ayırır, ancak bül uzunluğunun sadece yaklaşık üçte biri kadar uzanır. Bullanın östaki çıkışı, Carolinacetus'dakinde çok daha az belirgindir ve involucrum, Georgiacetus'unkine daha benzerdir. Bül yatay omurgası, involukrumun arka yüzeyinde görülebilir, tüm medial taraf boyunca ve bülün ön ucunun etrafında devam eder. Büyük bir sigmoid işlemin tabanı, bülün yan tarafında kısmen korunmuştur.[1]

Dağılım ve yaş

Holotip, AV-17, Ica Departmanı, Peru saha mevkiinden toplanmıştır (14.666783° Güney, 75.635150° Batı). Paracas Formasyonu'nda bulunan kalıntıları, orta Eosen, Bartoniyen'e aittir.[1]

Sınıflandırma

Supayacetus muizoni, arkeosetler arasında sadece basilosauridlerde bulunan bir durum olan yanak dişlerinde büyük aksesuar dişlerin bulunması nedeniyle Basilosauridae'nin bir üyesi olarak kabul edilir. Supayacetus ayrıca küçük boyutuna ve bilinen omur gövdelerinin herhangi birinde uzama olmamasına bağlı olarak Dorudontinae'nin bir üyesi olarak kabul edilir.[1]

Ayrıca bakınız

Kaynakça

  1. ^ a b c d e f Uhen, Mark D.; Pyenson, Nicholas D.; Devries, Thomas J.; Urbina, Mario; Renne, Paul R. (Eylül 2011). "New Middle Eocene Whales from the Pisco Basin of Peru". Journal of Paleontology. 85 (5): 955-969. doi:10.1666/10-162.1. ISSN 0022-3360. 

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