[D] Glacialisaurus hammeri [sG] [T]
Describer
Smith and Pol, 2007
Time
Jurassic Early
Classification
Saurischia Sauropodomorpha
Diet
Herbivore
Fossilsite
Hanson Formation, Antarctica
Info
Holotype
FMNH PR1823, a partial right astragalus, medial and lateral distal tarsals, and partial right metatarsus preserved in articulation with each other. Referred material: FMNH PR1822, a distal left femur.
Etymology
From the Latin glacialis, meaning “icy” or “frozen”. In reference to the geographic location of the type species, which is from the Beardmore Glacier region in the Central Transantarctic Mountains. In honor of Dr. William R. Hammer (Augustana college, Rock Island, USA), for his contributions to vertebrate paleontology and Antarctic research.
Type locality
Mt. Kirkpatrick, Beardmore Glacier region, Central Transantarctic Mountains, Antarctica. Type horizon: Approximately 4,100 meters, in the tuffaceous siltstones and mudstones of the lower part of the Hanson Formation, which is Early Jurassic in age (Elliot 1996).
Diagnosis
A robust non−eusauropod sauropodomorph dinosaur that can be distinguished from other sauropodomorphs by the presence of the following autapomorphies: a robust medial epicondylar ridge on the distal femur (convergently present, though more gracile, in many basal theropod dinosaurs); a robust adductor ridge extending from the proximal end of the femoral medial condyle; a second metatarsal with an anterior border that is weakly convex in proximal aspect; a hypertrophied lateral plantar flange on the proximal end of metatarsal II (present, but less developed in many basal sauropodomorphs, e.g., Saturnalia, Plateosaurus); a second metatarsal that is gently twistedmedially about its long axis at the distal end of its shaft; and a second metatarsal with a medial distal condyle that is more robust and well−de−veloped than the lateral distal condyle. (Smith and Pol , 2007)
Smith and Pol, 2007
Time
Jurassic Early
Classification
Saurischia Sauropodomorpha
Diet
Herbivore
Fossilsite
Hanson Formation, Antarctica
Info
Holotype
FMNH PR1823, a partial right astragalus, medial and lateral distal tarsals, and partial right metatarsus preserved in articulation with each other. Referred material: FMNH PR1822, a distal left femur.
Etymology
From the Latin glacialis, meaning “icy” or “frozen”. In reference to the geographic location of the type species, which is from the Beardmore Glacier region in the Central Transantarctic Mountains. In honor of Dr. William R. Hammer (Augustana college, Rock Island, USA), for his contributions to vertebrate paleontology and Antarctic research.
Type locality
Mt. Kirkpatrick, Beardmore Glacier region, Central Transantarctic Mountains, Antarctica. Type horizon: Approximately 4,100 meters, in the tuffaceous siltstones and mudstones of the lower part of the Hanson Formation, which is Early Jurassic in age (Elliot 1996).
Diagnosis
A robust non−eusauropod sauropodomorph dinosaur that can be distinguished from other sauropodomorphs by the presence of the following autapomorphies: a robust medial epicondylar ridge on the distal femur (convergently present, though more gracile, in many basal theropod dinosaurs); a robust adductor ridge extending from the proximal end of the femoral medial condyle; a second metatarsal with an anterior border that is weakly convex in proximal aspect; a hypertrophied lateral plantar flange on the proximal end of metatarsal II (present, but less developed in many basal sauropodomorphs, e.g., Saturnalia, Plateosaurus); a second metatarsal that is gently twistedmedially about its long axis at the distal end of its shaft; and a second metatarsal with a medial distal condyle that is more robust and well−de−veloped than the lateral distal condyle. (Smith and Pol , 2007)