Posted on

Get A New Horned Dinosaur From an Upper Cretaceous Bone Bed in PDF

By P.J. Currie, W. Langston, D.H. Tanke

ISBN-10: 0660198193

ISBN-13: 9780660198194

Within the first monographic remedy of a horned (ceratopsid) dinosaur in virtually a century, this enormous quantity offers one of many closest appears to be like on the anatomy, relationships, development and version, habit, ecology and different organic features of a unmarried dinosaur species. The learn, which was once performed over 20 years, used to be attainable as a result of discovery of a densely packed bone mattress close to Grande Prairie, Alberta. The locality has produced plentiful continues to be of a brand new species of horned dinosaur (ceratopsian), and components of at the least 27 person animals have been recovered. This new species of Pachyrhinosaurus is heavily relating to Pachyrhinosaurus canadensis, that's recognized from more youthful rocks close to Drumheller and Lethbridge in southern Alberta, yet is a smaller animal with many changes within the decorative spikes and bumps at the cranium. The adults of either species have mammoth bosses of bone within the positions the place different horned dinosaurs (like Centrosaurus and Triceratops) have horns. despite the fact that, juveniles of the recent species resemble juveniles of Centrosaurus in having horns instead of bosses. cranium anatomy undergoes awesome adjustments in the course of development and the horns over the nostril and eyes of the Pachyrhinosaurus juveniles remodel into bosses; spikes and horns increase at the best of and behind the frill that extends again over the neck. No reason has been made up our minds for the plain catastrophic demise of the herd of Pachyrhinosaurus from the Grande Prairie sector, however it has been urged that such herds can have been migratory animals. as well as the most descriptive paper, the quantity contains details at the distribution of bones in the bone mattress itself, and a state-of-the-art electronic remedy of CT-scan facts of the fossils to bare the anatomy of the animal's mind.

Show description

Read Online or Download A New Horned Dinosaur From an Upper Cretaceous Bone Bed in Alberta PDF

Similar paleontology books

The big cats and their fossil relatives : an illustrated - download pdf or read online

During this superbly illustrated normal historical past that hyperlinks extinct higher pussycat species with these nonetheless in life, collaborators Alan Turner and Mauricio Anton weave jointly the facts of contemporary tom cat habit with that of the fossil checklist. Turner's transparent, insightful prose and Anton's masterly illustrations mix to supply experts and beginners alike a correct and available consultant to the evolution of cats.

Get Pleistocene Mammals of Europe PDF

This publication offers a complete remedy of all of the Pleistocene species in Europe, labeled in response to sleek taxonomic rules. for every species there's a description of its descent and migration background, its diversity, and its mode of lifestyles. the 1st model of this e-book was once a semipopular paperback within the Swedish Aldus sequence.

Solnhofen: A Study in Mesozoic Palaeontology - download pdf or read online

The prestigious Solnhofen limestone is one of the most vital fossil deposits due to its magnificent range of organisms, many exquisitely preserved. This booklet illustrates a few of the marine and terrestrial creatures and crops, buried a hundred and fifty million years in the past in gentle lagoonal muds, to supply a distinct glimpse into the real range of Jurassic existence.

New PDF release: T. rex and the crater of doom

Sixty-five million years in the past, a comet or asteroid higher than Mount Everest slammed into the Earth, inducing an explosion resembling the detonation of 100 million hydrogen bombs. Vaporized detritus blasted in the course of the surroundings upon influence, falling again to Earth world wide. Disastrous environmental outcomes ensued: an enormous tsunami, continent-scale wildfires, darkness, and chilly, by way of sweltering greenhouse warmth.

Additional info for A New Horned Dinosaur From an Upper Cretaceous Bone Bed in Alberta

Sample text

Canadensis (Langston 1967). The dorsoposterior flange extends posteriorly to contact the lacrimal as in most other centrosaurines, although occasionally (AMNH 5351, Centrosaurus nasicornis), a nasal-maxillary contact prevents the premaxilla from reaching the lacrimal. Rostral Comb A unique and variable feature of at least some adult individuals of P. lakustai is what we term the rostral comb (Fig. 9). In well-developed examples, the rostra I comb comprises two or three massive anteriorly directed hook-like projections that are arranged in tandem on the narial bridge.

The co-ossified nasal and sLlpraorbital bosses are described separately within their units. Rostral The rostra I bone (Fig. 9) is variably attached to rhe premaxillae, and rhe two bones form the peculiar rostral comb in adults (described after the premaxilla). 50, Fig. 10) have well-defined, smoothly finished contact surfaces for the premaxi llae. - firmly fused to the premaxillae. The rostral is broader than might be inferred from the tr:lnsversely compressed skulls from Pipcstone Creek (Fig. 10E).

In its mature state, the boss of p. lakustai resembles that of P. canadensis, but it occupies a relatively smaller area of the skull roof in P. lakustai and does not contact the nasal boss anteriorly. In skulls of P. canadensis from Scabby Butte and Drumheller, the top of the boss is flat to slightly convex, and the bone is several centimetres thick at its center. In all Pipestone Creek specimens so far prepared, the top of the boss is depressed, and the roofing bone is thin comparable with conditions in the holotype of P.

Download PDF sample

A New Horned Dinosaur From an Upper Cretaceous Bone Bed in Alberta by P.J. Currie, W. Langston, D.H. Tanke


by Robert
4.1

Rated 4.76 of 5 – based on 19 votes