[D] Segisaurus halli [sG] [T]
Describer
Camp, 1936
Time
Jurassic Early ?Sinemurian Pliensbachian
Classification
Saurischia Theropoda Ceratosauria
Diet
Carnivore
Fossilsite
Navajo Formation, Segi Canyon, Arizona, US
Length
1 meter
Info
Genus - Typespecies
Discovered in 1933.
Consits of a fragmentary, headless skeleton which includes a few back vertebrae, some ribs, the shoulder girdle, incomplete arms, legs and parts of the pelvis. The teeth are not preserved. Segisaurus is small, and is roughly contemporaneous with Syntarsus. However, morphological data fall to place it unequivocally with that group.
Holotype
UCMP 32101, partial skeleton from half adult animal.
Senter and Hutchinson, 2001, observed after additional preperation of the holotype skeleton the following: Clavicles (previously incorrectly identified as a single clavicle) fused at the midline, forming a furcula, preserved in the specimen articulated with the coracoids; port-cervical vertebrae lacking pneumatopores; femur with small lesser trochanter, a large fourth trochanter and a trochtanter shelf; tibia exhibiting a fibular crest; long bones thin-walled (as in other theropods). An obvious automorphy is the ischial foramen in the proximal ischial apron.
Camp, 1936
Time
Jurassic Early ?Sinemurian Pliensbachian
Classification
Saurischia Theropoda Ceratosauria
Diet
Carnivore
Fossilsite
Navajo Formation, Segi Canyon, Arizona, US
Length
1 meter
Info
Genus - Typespecies
Discovered in 1933.
Consits of a fragmentary, headless skeleton which includes a few back vertebrae, some ribs, the shoulder girdle, incomplete arms, legs and parts of the pelvis. The teeth are not preserved. Segisaurus is small, and is roughly contemporaneous with Syntarsus. However, morphological data fall to place it unequivocally with that group.
Holotype
UCMP 32101, partial skeleton from half adult animal.
Senter and Hutchinson, 2001, observed after additional preperation of the holotype skeleton the following: Clavicles (previously incorrectly identified as a single clavicle) fused at the midline, forming a furcula, preserved in the specimen articulated with the coracoids; port-cervical vertebrae lacking pneumatopores; femur with small lesser trochanter, a large fourth trochanter and a trochtanter shelf; tibia exhibiting a fibular crest; long bones thin-walled (as in other theropods). An obvious automorphy is the ischial foramen in the proximal ischial apron.