|Appears in Collections:||Biological and Environmental Sciences Journal Articles|
|Peer Review Status:||Refereed|
|Title:||The diversity and phylogeny of the paterinate brachiopods|
Popov, Leonid E
Holmer, Lars Erik
|Citation:||Williams A, Popov LE, Holmer LE & Cusack M (1998) The diversity and phylogeny of the paterinate brachiopods, Palaeontology, 41 (2), pp. 221-262.|
|Abstract:||The chemico-structure and morphology of the shells of the earliest known brachiopods, the paterinates, have many features consistent with the antiquity of the group and its phylogenetic proximity to the ancestral stock of the phylum. The organophosphatic shell is typically finely laminated and imprinted throughout with outwardly convex epithelial casts in the older cryptotretids. The greatest concentration of amino acids occurs in the shells of Ordovician Dictyonites but the higher level of aspartic acid/asparagine may not be related exclusively to the post-Cambrian age of the genus as the shell is uniquely 'perforate' through periodic reductions in phosphatic secretion. The quadrilobate larval dorsal valve, the interareas with delthyria and notothyria variably covered by homeodeltidia (or pseudodeltidia in some cryptotretids) and rarer homeochilidia suggest rhynchonelliform affinities as do mantle canal impressions and a musculature which included diductors implanted dorsally on the median plate within the notothyrium. Phylogenetic analysis with penecontemporaneous linguliforms and rhynchonelliforms as outgroups indicates that the paterinates are a sister group of the lingulates and consist of two subclades, Paterinidae and Cryptotretidae. The latter were short lived but remarkably diverse and may well have evolved directly from the brachiopod stem group.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|The_diversity_and_phylogeny_of_the_paterinate_brac (1).pdf||5.12 MB||Adobe PDF||Under Permanent Embargo Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.