Dinosaurus yang hidup 205 juta tahun yang lalu ini setinggi anjing besar dengan tulang yang tidak biasa. Demikian jelas Hans-Dieter Sues, ahli purbakala vertebrata di National Museum of Natural History di Washington DC. "Moncongnya pendek dan gigi depannya besar-besar," katanya. Ia juga menambahkan, "Jenis struktur tulang yang tidak dikira pada waktu itu untuk dinosaurus predator."
Dinosaurus tertua yang diketahui hidup 230 juta tahun yang lalu, dalam Periode Triassic. Setelah itu, ada jeda besar dari hasil temuan fosil. Banyak ahli memperkirakan bahwa dinosaurus-dinosaurus awal punah. "Setelah itu predator yang lebih rumit mengambil alih kemudian terjadi diversifikasi pada peralihan periode Triassic ke Jurassic," kata Sues.
Daemonosaurus c ini merupakan jembatan yang menghubungkan kedua grup dinosaurus. Dari fosil yang ditemukan, dinosaurus ini memiliki beberapa ciri yang menghubungkan jeda evolusi antara dinosaurus awal ke dinosaurus yang lebih modern. Berdasarkan analisis terhadap fosil yang ditemukan, dinosaurus ini memiliki ciri Triassic dengan beberapa ciri dari Jurassic.
Ciri Triassic yang dimilikinya, misalnya, jeda kecil antara lubang hidung dan rongga mata. Tulang yang berkaitan dengan kantong udara yang seperti sistem paru-paru burung juga masih punya ciri primitif. Ciri dinosaurus yang lebih modern yang dimiliki Daemonosaurus c ada pada gigi.
"Ini adalah bukti bahwa dinosaurus punya distribusi yang lebih luas," jelas Sue.
Sumber :
National Geographic Indonesia
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