The Downtonian and Devonian Vertebrates of Spitsbergen: Family Cephalaspidae, by E. A. Stensio PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download The Downtonian and Devonian Vertebrates of Spitsbergen: Family Cephalaspidae, by E. A. Stensio PDF full book. Access full book title The Downtonian and Devonian Vertebrates of Spitsbergen: Family Cephalaspidae, by E. A. Stensio by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 240
Get Book Here
Book Description
Author: Erik Andersson Stensiö
Publisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 658
Get Book Here
Book Description
Author: Erik Andersson Stensiö
Publisher:
ISBN: 9780405127465
Category : Cephalaspidae
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Paleontology
Languages : en
Pages : 240
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Craniata, Fossil
Languages : en
Pages :
Get Book Here
Book Description
Author: Erik Andersson Stensiö
Publisher:
ISBN:
Category : Cephalaspidae
Languages : en
Pages : 0
Get Book Here
Book Description
Author: Johan Aschehoug Kiaer
Publisher:
ISBN:
Category : Cyathaspida
Languages : en
Pages : 138
Get Book Here
Book Description
Author: Gustav Wängsjö
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Johan Aschehoug Kiaer
Publisher:
ISBN:
Category : Cyathaspida, Fossil
Languages : en
Pages :
Get Book Here
Book Description
Author: Erik Helge Oswald STENSIÖ
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: M. W. Hardisty
Publisher: Springer
ISBN: 1489934081
Category : Science
Languages : en
Pages : 440
Get Book Here
Book Description
The proliferation of scientific texts and their rapidly escalating costs demands of an author some justification for the production of yet another specialised volume; particularly one that treats of a relatively obscure group of animal- the Cyclostomes-whose significance is little appreciated outside the circle of professional biologists. Yet, within the zoological literature this group of vertebrates has always commanded a degree of attention, quite dispropor tionate to the comparatively small numbers of species involved or their economic importance. This special interest stems in the main from their unique phylogenetic status. Asjawless vertebrates the hagfish and the lamprey are regarded as the sole survivors of a once flourishing group of Palaeozoic vertebrates-the Agnathans-amongst which are numbered the first verte brates to appear in the fossil record. Because of this relationship to the fossil agnathans it was inevitable that past discussion of the phylogenetic signifi cance of the cyclostomes should have been dominated by comparative anatomists and palaeontologists, although in recent years their unique evolutionary position has increasingly attracted the interest of comparative physiologists and students of molecular evolution. Within the last fifteen years both the hagfish and the lamprey have been the subject of separate publications describing in detail many aspects of their morphology, physiology and life cycles (Brodal, A. and Fiinge, R., The Biology ofMyxine, 1963; Hardisty, M.W. and Potter, I.C., The Biology of Lampreys, 1971-72.
