ERTH 2401 Lecture Notes - Feathered Dinosaur, Stegoceras
11 Apr 2012
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Document Summary
Marginocephalia(edge-head)--> reflects an important connection between two major different looking, groups of dinosaurs: pachycephalosauria and ceratopsia. Pachycephalosauria (thickheadlizard: fossil dominance, skulls, very solid ,dome structure, spiny skulls. Genes: stegoceras dome is more straight line up (t/f) Adults: travel with herds if all die we look at: Ontogenetic stages--> development of an individual organism from embryo to adult: within a group of dinosaurs. Gender: males are larger than female ex elephant seals, females are larger than males ex snakes. Sandstorms: asia has small streams as a food source for pachycephalosauridae (t/f) In asia paleoenvironment"s supported pachycephalosaur but also: support the preservation of the fossil remains of pachycephalosaur. Possibly faster sedimentations rates: in these kind of condition. In asia there is little evidence for transport of pachycephalosaur (t/f) Feeding: what do pachycephalosaur teeth, and impressive volume of their abdominal regions suggest, pachycephalosaur were herbivorous.
