Results 31 to 40 of about 13,502 (252)

The first Late Triassic Chinese triadophlebiomorphan (Insecta: Odonatoptera): biogeographic implications

open access: yesScientific Reports, 2017
The clade Triadophlebiomorpha represents a morphological ‘link’ between the Paleozoic griffenflies (Meganisoptera) and the modern taxa. Nevertheless they are relatively poorly known in the body structures and paleobiogeography.
Daran Zheng   +6 more
doaj   +1 more source

Structure of the Alpujarrides on the southern and eastern border of the Sierra de Lújar

open access: yesEstudios Geologicos, 1990
El Complejo Alpujárride situado al Sur de Sierra Nevada y comprendido entre Motril y Adra, está formado por cinco mantos que son, en orden ascendente: Lújar, Cástaras, Alcázar, Murtas y Adra.
J. Cuevas   +3 more
doaj   +1 more source

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

open access: yesThe Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer   +2 more
wiley   +1 more source

Confronting Complexity: Interpretation of a Dry Stone Walled Landscape on the Island of Cres, Croatia

open access: yesLand, 2022
Dry stone walls are a worldwide phenomenon that may shape entire regions. As a specific form of vernacular agro-pastoral practice, they are expressions of the culture and history of a region.
Michael Doneus   +2 more
doaj   +1 more source

Paleopathology of a putative colossosaurian caudal vertebra (Neosauropoda: Titanosauria) from the Presidente Prudente Formation, Brazil

open access: yesThe Anatomical Record, EarlyView.
Abstract Studies investigating paleopathologies in sauropods remain scarce despite their relative abundance in the fossil record. In this study we report new occurrence of paleopathological features, corresponding to a neoplasm found in a middle caudal vertebra (MCT.R.2120) of an advanced titanosaur from the Presidente Prudente Formation (Bauru Basin ...
Maria Luiza Peres Bertolossi   +5 more
wiley   +1 more source

Formal stratigraphy in the Pleistocene of Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1992
The importance of the application of formal lithostratigraphical, biostratigraphical and chronostratigraphical procedures to the subdivision of Finnish Pleistocene sediment sequences and the need to define both regional and local stratotypes are ...
P.L. Gibbard
doaj   +1 more source

A shallow-water oxygen minimum zone in an oligotrophic Tonian basin

open access: yesNature Communications
The Tonian Period (1000–720 Ma) bore witness to the transition from a prokaryote-dominated marine ecosystem to one characterized by the proliferation of eukaryotes.
Yunpeng Sun   +10 more
doaj   +1 more source

Vohtenkellarinsuo, a bog in Paimio, SW Finland with a cultural origin [PDF]

open access: yesBulletin of the Geological Society of Finland, 1983
The present investigation describes the development of the bog Vohtenkellarinsuo and the history of the local settlement of the Paimio river valley. Both the stratigraphy and the pollen data of the peat profile reflect continuous human interference from ...
I. Vuorela
doaj   +1 more source

Description of large, well‐preserved Enchodus specimens from the Bearpaw Formation of Alberta, Canada

open access: yesThe Anatomical Record, EarlyView.
Abstract Fishes of the genus Enchodus were abundant and cosmopolitan in the Late Cretaceous, but are primarily known from isolated remains in Canada. Four well‐preserved fish skulls were recovered in recent years from ammolite mines sampling the Bearpaw Formation of Southern Alberta, and are here referred to Enchodus petrosus Cope, 1874.
Luke E. Nelson   +2 more
wiley   +1 more source

Earliest evolution of stipules among vascular plants documented in the late Paleozoic stem group of Marattiales

open access: yesBMC Biology
Background Stipules are specialized appendages borne at the base of a leaf petiole and may perform a variety of functions including sheltering delicate growing tissues from environmental exposure, facilitating vegetative propagation and dispersal, and ...
Weiming Zhou   +7 more
doaj   +1 more source

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