World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Notoungulata and Litopterna of the Early Miocene Chucal Fauna, Northern Chile : Fieldiana, Geology, New Series, No. 50

By Croft, Darin A

Click here to view

Book Id: WPLBN0001065131
Format Type: PDF eBook
File Size:
Reproduction Date: 2010

Title: Notoungulata and Litopterna of the Early Miocene Chucal Fauna, Northern Chile : Fieldiana, Geology, New Series, No. 50  
Author: Croft, Darin A
Volume: Fieldiana, Geology, new Series, No. 50
Language: English
Subject: Notoungulata -- Chile, Litopterna -- Chile, Paleontology -- Miocene
Collections: Biodiversity Heritage Library Collection
Historic
Publication Date:
2004
Publisher: Chicago, Illinois; Field Museum of Natural History Press

Citation

APA MLA Chicago

A, C. D., & R, W. A. (2004). Notoungulata and Litopterna of the Early Miocene Chucal Fauna, Northern Chile : Fieldiana, Geology, New Series, No. 50. Retrieved from http://www.hawaiilibrary.net/


Description
Ungulates, Fossil -- Chile ; This study describes the notoungulates and litopterns (endemic South American ungulates) from the Chucal Fauna of northern Chile. Eight species are known to date, including seven notoungulates and one litoptern. The bulk of the toxodontid notoungulate material, including a well-preserved partial skull, is referred to Nesodon imbricatus. A few postcranial elements and a single partial tooth are referred to Adinotherium sp. indet. Poorly preserved dental material may represent a third (indeterminate) toxodontid. Fragmentary dental and postcranial remains are referred to Hegetotherium cf. H. mirabile (Hegetotheriidae). Theosodon sp. indet. (Litopterna: Macraucheniidae) is recorded on the basis of a variety of diagnostic limb bones, but dental remains of this taxon are not yet recorded at Chucal. Three new species of mesoteriid notoungulates are described: Altitypotherium paucidens, Altitypotherium chucalensis, and Eotypotherium chico. The largest, Altitypotherium paucidens, differs from all previously described mesotheriids in the loss of an upper premolar (P3). Altitypotherium chucalensis is represented by an associated skull and mandibles plus postcranial remains. Eotypotherium chico, based on gnathic remains, is the smallest mesotheriid known. Bracketing radioisotopic dates and biostratigraphic correlation argue for referral of the Chucal Fauna to the Santacrucian South American Land Mammal Age (late early Miocene). The forms from Chucal are the only mesotheriids known for this temporal interval and also mark the earliest known occurrence of mesotheriines. A phylogenetic analysis places the three taxa from Chucal as early diverging members of the Mesotheriinae, with Eotypotherium chico representing the outgroup to all remaining members of the clade. In the presence and abundance of mesotheriines and in the absence of interatheriids, the Chucal Fauna more closely resembles geographically proximate (but younger) faunas in Bolivia and the Precordillera of northernmost Chile than temporally correlative faunas from southern South America. This pattern indicates significant faunal provinciality in South America during the late early Miocene and suggests that the intermediate latitudes might have been a center of diversification for mesotheriines and potentially other groups of mammals ; Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-1978). Fieldiana Geology New Series No. 1 began June 29, 1979

Summary
University of Illinois Urbana-Champaign : University of Illinois Urbana-Champaign

 

Click To View

Additional Books


  • The Robber Kitten (by )
  • Leadership Sub Goal (by )
  • A Middle English Vocabulary. Designed fo... (by )
  • Transactions of the Wisconsin Academy of... (by )
  • Milli Muicadelede Kadrolaran Vazifeleri (by )
  • Unilingual (by )
  • Catalogue of the Completed Pictures Stud... (by )
  • The Rise of the Russian Empire (by )
  • The Legal Protection of Woman Among the ... (by )
  • Selections from American Poetry (by )
  • Applied Psychology : A Series of Twelve ... (by )
  • Applied Thermodynamics for Engineers (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.