Genera

Alvarezsaurus

7월 10, 2025 - By user

Alvarezsaurus

“Don Gregorio Alvarez’s lizard”

[ Measurements | Time | Place | Remains | Essay | Images ]

CLASSIFICATION

Alvarezsaurus
Bonaparte, 1991TYPE SPECIES:
A. calvoi Bonaparte, 1991

Animalia Vertebrata Tetrapoda Sauropsida Archosauromorpha Ornithodira Dinosauria Theropoda
Tetanurae Coelurosauria Alvarezsauria

MEASUREMENTS

see also: World Records

TIME

Coniacian to Santonian

see also: Ages of the Mesozoic

PLACE

see also: Paleo-Maps

REMAINS

MUCPv 54 [holotype]: partial spine, girdles, hindlimbs
vertebrae, scapula, partial pelvis, partial hindlimbs

see also: Anatomy

ESSAY

The most primitive alvarezsaur known.

IMAGES

T. MICHAEL KEESEY

the unusual bird(?) Alvarezsaurus calvoi

JULIUS CSOTONYI

sundry theropodsI. Alvarezsaurus calvoi II. Coelophysis bauri III. Baryonyx walkeri IV. Oviraptor philoceratops V. Aublysodon mirandis VI. Anserimimus planinychus VII. Avimimus portentosus VIII. Compsognathus longipes IX. Carnotaurus sastrei X. Ceratosaurus nasicornis
(These are not to the same scale. Alvarezsaurus may have been a bird, and therefore feathered.)