Skip to main content Accessibility help
×
Home
Hostname: page-component-5959bf8d4d-2zkqf Total loading time: 0.836 Render date: 2022-12-08T00:51:57.991Z Has data issue: true Feature Flags: { "useRatesEcommerce": false } hasContentIssue true
Early Miocene Paleobiology in Patagonia Early Miocene Paleobiology in Patagonia
High-Latitude Paleocommunities of the Santa Cruz Formation
Buy print or eBook[Opens in a new window]

Book contents

9 - Diversity and paleobiology of the Santacrucian birds

Published online by Cambridge University Press:  05 June 2013

Sergio F. Vizcaíno
Affiliation:
Museo de La Plata, Argentina
Richard F. Kay
Affiliation:
Duke University, North Carolina
M. Susana Bargo
Affiliation:
Museo de La Plata, Argentina
Get access

Summary

Abstract

This chapter presents the state of knowledge of the avian diversity recorded in Santacrucian beds (late Early Miocene) with an updated systematic summary of all taxa. Phorusrhacids outnumber seriemas, rheas, and basal falconiforms in diversity and abundance. More fragmentary occurrences are reported of pelecaniforms, anseriforms, gruiforms, and ciconiiforms. Body masses of fossil forms are inferred from the dimensions of their hindlimb bones (i.e. femur, tibiotarsus) based on logarithmic equations previously modeled from living analogs. In some cases, body sizes of the extinct species are also inferred from the relative sizes of other bones of similar extant species. Inferences about diet and foraging strategies are based on the size and shape of the limb elements and structural details of the cranial elements, by analogy with extant birds. The predator niche is represented by falconids, four species of phorusrhacids and a seriemid. Phorusrhacids and seriemids probably lived in open areas because of their cursorial capabilities. However, birds such as the waterfowls, limpkins, spoonbills, and darters indicate the presence of temporarily flooded savannas or permanent water bodies in forested areas. Habitat preferences of extant seriemas, rheas, tinamous, and the falconid Herpetotheres are consistent with Chacoan-like conditions, and they are useful to infer by extrapolation similar Santacrucian paleoenvironments for their extinct analogs. Santacrucian environments were probably characterized by seasonality in temperature and rainfall and the presence of alternating areas of herbaceous vegetation with shrubby or wooded areas.

Type
Chapter
Information
Early Miocene Paleobiology in Patagonia
High-Latitude Paleocommunities of the Santa Cruz Formation
, pp. 138 - 155
Publisher: Cambridge University Press
Print publication year: 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)
21
Cited by

Save book to Kindle

To save this book to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×