Silesaurus opolensis


Sugerowana cytacja: Dzik, J. 2013. Silesaurus opolensis sp. Dzik, 2003 Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Silesaurus+opolensis)

Diagnoza

Beak on the dentaries; small number of teeth (11-12 in both dentary and maxilla); 25 presacral vertebrae with 9-11 cervicals, and last two dorsals fused with the two sacrals that have deep sacral ribs;  elongate, gracile front limbs, and digit I of pes reduced to vestigial metatarsal that probably lacked phalanges.

Porównanie

Rekonstrukcja szkieletu Silesaurus opolensis w postawie dwunożnego biegu (Piechowski & Dzik 2010).

Autekologia

Omnivorous or herbivorous. Facultatively bipedal; delicate front limbs probably used to support the body at stance.

Występowanie geograficzne

Poland, probably Morocco and Brazil, possibly Tanzania.

Zasięg czasowy

Late Carnian (possibly also Early Norian). 

Materiały muzealne

Four more or less incomplete articulated skeletons. Isolated bones representing at least eight individuals (possibly more than twenty).

Literatura

Dzik, J. 2001. A new Paleorhinus fauna in the early Late Triassic of Poland. Journal of Vertebrate Paleontology 21, 625-627.

Dzik, J. 2003. A beaked herbivorous archosaur with dinosaur affinities from the early Late Triassic of Poland. Journal of Vertebrate Paleontology 23, 556-574.

Dzik, J. & Sulej, T. 2004. Pierwszy polski dinozaur. 80 pp, Śląskie Wydawnictwo ADAN, Opole. 

Dzik, J. & Sulej, T. 2007. A review of the early Late Triassic Krasiejów biota from Silesia, Poland. Palaeontologia Polonica 64, 1-27.

Ferigolo, J. & Langer, M.C. 2006. A Late Triassic dinosauriform from south Brazil and the origin of the ornitischian predentary bone. Historical Biology 19, 1–11.

Kammerer, C.F. Nesbitt, S.J., & Shubin, N.H. 2012. The first basal dinosauriform (Silesauridae) from the Late Triassic of Morocco. Acta Palaeontologica Polonica, 57, 277-284.

Nesbitt, S.J., Sidor, C.A., Irmis, R.B., Angielczyk, K.D., Smith, R.M.H., & Tsuji, L.M.A. 2010. Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira". Nature 464, 95–98.

Piechowski, R. & Dzik, J.  2010. The axial skeleton of Silesaurus opolensis. Journal of Vertebrate Paleontology 30, 1127-1141.

Specyfikacja

Królestwo
ANIMALIA 

Typ
CHORDATA 

Podtyp
VERTEBRATA 

Gromada
REPTILIA 

Podgromada
ARCHOSAURIA 

Rząd
Dinosauria 

Podrząd
Ornithopoda

Rodzina
Silesauridae

Rodzaj
Silesaurus

Gatunek
Silesaurus opolensis

Synonimy
?Diodorus scytobrachion Kammerer, Nesbitt, & Shubin, 2012, ?Sacisaurus agudoensis Ferigolo & Langer, 2006,  ? Asilisaurus kongwe Nesbitt et al., 2010 

Populacja typowa gatunku

Holotyp

Incomplete skeleton ZPAL Ab III/361 (Dzik 2008, fig. 2).

Locus typicus

Clay-pit in Krasiejów near Opole, southern Poland.

Stratum typicum

Upper fossiliferous horizon about 1 m below the top of the LateTriassic succession exposed in Krasiejów, late Carnian.


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Created by Administrator on 2013/07/29 16:12

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