Results 161 to 170 of about 6,828,747 (385)

CRETACEOUS CONCHOSTRACANS FROM ALAGOAS BASIN (NORTHEASTERN BRAZIL)

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
Conchostracans from an outcrop of the Maceió Formation (Aptian-Albian, Alagoas Basin) located at Japaratinga Beach (Alagoas State, Brazil) are studied.
Mitsuru Arai, Ismar de Souza Carvalho
doaj  

Bulgaria during the Early Cretaceous - a review [PDF]

open access: bronze, 1999
Тодор Николов   +1 more
openalex   +1 more source

Climate stability drives multidimensional nestedness of amphibian assemblages in a Chinese sky island system

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang   +5 more
wiley   +1 more source

Cretaceous lacewing larvae with binocular vision demonstrate the convergent evolution of sophisticated simple eyes

open access: yesInsect Science, EarlyView.
We report three ca. 100 million‐year‐old lacewing larvae with extraordinarily large stemmata. One of them additionally has a very wide head, which represents a previously unknown morphology. The arrangement of the stemmata indicates stereoscopic vision in these predatory larvae.
Carolin Haug   +9 more
wiley   +1 more source

Latitudinal distribution of paleotemperature on land and sea from early Cretaceous to middle Miocene [PDF]

open access: yes, 1994
Paleotemperature data from the of oceans and the continents are summarized for the interval from the early Cretaceous through the middle Miocene. The data are contoured on diagrams of age vs latitude after adjustments for the known occurrences of ...
Frakes, Larry A.   +2 more
core  

Strontium isotope stratigraphy: LOWESS version 3: best fit to the marine Sr-isotope curve for 0-509 Ma and accompanying look-up table for deriving numerical age [PDF]

open access: yes, 2001
An improved and updated version of the statistical LOWESS fit to the marine 87Sr/86Sr record and a revised look-up table (V3:10/99; available from j.mcarthur@ucl.ac.uk) based upon it enables straightforward conversion of 87Sr/86Sr to numerical age, and ...
Bailey, T.R.   +2 more
core  

The predatory behavior of ants: an impressive panoply of morphological adaptations

open access: yesInsect Science, EarlyView.
This review focuses on predation in ants, showing the wide diversity of cases from solitary foraging to group hunting tactics, as well as the evolution of mandible shape frequently adapted to capture specific prey. Although most ants are generalist feeders, finding their sugary substances directly on plants or indirectly via sap‐sucking insects, some ...
Alain Dejean   +6 more
wiley   +1 more source

FERNS: A PALAEOCLIMATIC SIGNIFICANT COMPONENT OF THE CRETACEOUS FLORA FROM LIVINGSTON ISLAND, ANTARCTICA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2015
Available data on Early Cretaceous Antarctic ferns, based on mega and microfossils from Cerro Negro Formation (Shetland Islands) in Livingston Island are evaluated, together with the information provided by recently collected fossils.
Silvia N. Césari   +2 more
doaj  

Inferring bird migration from bone isotopes and histology: A fossil‐friendly methodological framework

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Bird seasonal migration is a remarkable biogeographic phenomenon, yet its deep‐time origin(s) and evolutionary history remain poorly understood, with the bird fossil record largely overlooked. This study explores the predictability of bird migratory behaviour from the oxygen isotope composition of their bone apatite phosphate (δ18Op), a ...
Anaïs Duhamel   +7 more
wiley   +1 more source

Home - About - Disclaimer - Privacy