lunes, 19 de octubre de 2009

¿Las huellas de dinosaurio más pequeñas del mundo?

En la revista digital de divulgación NewScientist acaban de publicar un artículo sobre la huella de dinosaurio más pequeña del mundo. Está en inglés pero os lo adjunto de todas formas:

"Baby dinosaur made tracks as it fled for its life

ONLY just hatched and new to the world, the little guy who left these prints in the riverbed was probably running for its life. Barely 10 centimetres tall, the hatchling would have been the length of a wren and easy prey for pterosaurs and other hungry dinosaurs.

The prints are the tiniest dinosaur footprints ever found. They were left between 125 and 110 million years ago, are just 1.27 cm and 1.51 cm long, and clearly show soft foot pads and three pointed claws.

Kyung Soo Kim of Chinju National University of Education in Jinju, South Korea, says the baby track-maker was a cousin of the fearsome T. Rex and belonged to the theropod sub-order, which includes tyrannosaurs.

"It was running to hide right after hatching," Kim speculates. It had plenty of reasons to do so: nearby tracks show it shared its home with fleet-footed, meat-eating dromeosaurs, such as Velociraptor, together with other dinosaurs, pterosaurs and shorebirds.

The prints were discovered in 2008 during the construction of a reservoir on Changseon Island, located 320 kilometres from the South Korean capital of Seoul.

The previous smallest dinosaur footprints were found in 2004 on Skye off the west coast of Scotland and were up to 40 per cent bigger than the present find. Those prints, which were found by Neil Clark of the Hunterian Museum in Glasgow, UK, were thought to have been made by Coelophysis. Kim presented the find at a conference in Bristol, UK, last week."

He buscado lo que ha presentado Kim en la reunión de la SVP en Bristol y os lo adjunto también:


KIM, Kyung-Soo; LIM, Jong-Deock ; KONG, Dal-Yong; LOCKLEY, Martin; PARK, Geun Sil.

The smallest dinosaur tracks known from the ichnogenus Minisauripus were discovered from the Cretaceous Haman Formation of Changseon Island on the southern coast of Korea. The island vertebrate ichnofauna consists of Minisauripus cf. zhenshounani, Dromaeosauripus hamanensis, Ignotornis yangi, Koreanaornis hamanensis, pterosaur trackways, and other sauropod, theropod, and ornithopod footprints. A total of 12 Minisauripus tracks include one trackway which comprises 4 tracks ranging from 1.27 to 1.51 cm long and 1.06 to 1.30 cm width. The tracks are characterized by asymmetric, very small, well-preserved pads, with prominent claw traces. The ichnogenus Minisauripus represents a diminutive theropod footprint with two ichnospecies: M. chuanzhuensis and M. zhenshounani. The latter is narrower than the former with digits less-divergent and digit II relatively shorter. Therefore, these tracks resemble M. zhenshounani rather than M. chuanzhuensis.

The ichnogenus Minisauripus is known from Sichuan and Shandong Provinces, China and Changseon and Sinsu Islands, Korea. M. chuanzhuensis from Sichuan Province and M. zhenshounani from Shandong range from 2-3 cm and 2.5-6.1 cm long, respectively. Eight Korean tracks assigned to M. cf. chuanzhuensis and M. cf. zhenshounani are 2.3-3.5 cm long. Previously, the smallest known dinosaur footprint was a 1.78 cm long theropod track discovered on the Isle of Skye, Scotland and recorded in the Guinness Book of World Records. The dinosaur tracks from Changseon Island are between 15 and 29% smaller than those from Skye. The smallest footprint from Changseon Island is thought to have been made by a baby dinosaur right after hatching, because height at the hip of the track maker by Thulborn’s allometric equation is roughly estimated at only 4 cm. Thus the track maker’s total height is estimated at less than 10. In comparison Microraptor, the smallest known dinosaur was a giant at 42-83 cm long.

Parece ser que todo indica que han encontrado las huellas más pequeñas. Espero la publicación y sobre todo las fotos que no dejen lugar a duda este hallazgo.

Más información: (fotografía también)

1 comentario:

  1. no tenia yo fichada esa minihuella escocesa! esta el pdf gratis aqui:

    Clark, N.D.L. and Ross, D.A. and Booth, P. 2005. Dinosaur tracks from the Kilmaluag Formation (Bathonian, Middle Jurassic) of Score Bay, Isle of Skye, Scotland, UK. Ichnos, 12(2), 93-104.

    Y de regalo dos mas:

    Clark, N.D.L. and Booth, P. and Booth, C.L. and Ross, D.A. 2004. Dinosaur footprints from the Duntulm Formation (Bathonian, Jurassic) of the Isle of Skye. Scottish Journal of Geology, 40(1), 13-21.

    Clark, N.D.L. and Brett-Surman, M.K. 2008. A comparison between dinosaur footprints from the Middle Jurassic of the Isle of Skye, Scotland, UK, and Shell, Wyoming, USA. Scottish Journal of Geology, 44(2), 139-150.


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