Results 11 to 20 of about 6,127 (222)

Characterization and ecological significance of a seed bank from the Upper Pennsylvanian Wise Formation, southwest Virginia

open access: yesActa Palaeobotanica, 2017
Soil seed banks are important to the maintenance and restoration of floras. Extant seed banks exhibit unique characteristics with regard to the distribution of seed size and seed density.
PETRA S. YEHNJONG   +2 more
doaj   +2 more sources

UPPER CARBONIFEROUS (PENNSYLVANIAN) CONODONTS FROM SOUTH GUIZHOU OF CHINA

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2003
This paper describes in detail che conodont sequence of che Upper Carboniferous (Pennsylvanian) and the upper and lower boundaries in this interval at the Nashui section in Luodian, South Guizhou. The following 23 conodont zones, in descending order, can
WANG ZHIHAO, QI YUPING
doaj   +2 more sources

At last, a Pennsylvanian stem-stonefly (Plecoptera) discovered

open access: yesBMC Evolutionary Biology, 2011
Background Stem-relatives of many winged insect orders have been identified among Pennsylvanian fossils (Carboniferous Period). Owing to their presumed 'basal' position in insect phylogeny, stoneflies were expected to occur at this period.
Stark Bill   +4 more
doaj   +2 more sources

Carbonodraco lundi gen et sp. nov., the oldest parareptile, from Linton, Ohio, and new insights into the early radiation of reptiles [PDF]

open access: yesRoyal Society Open Science, 2019
Redescription of the holotype specimen of Cephalerpeton ventriarmatum Moodie, 1912, from the Middle Pennsylvanian (Moscovian) Francis Creek Shale of Mazon Creek, Illinois, confirms that it is a basal eureptile with close postcranial similarities to other
Arjan Mann   +3 more
doaj   +1 more source

Bashkirian rugose corals from the Carboniferous Mattson Formation in the Liard Basin, northwest Canada—stratigraphic and paleobiogeographic implications [PDF]

open access: yesActa Palaeontologica Polonica, 2019
Colonies of the rugose corals Nemistium liardense sp. nov. and Heritschioides simplex sp. nov. were collected from limestone in the upper member of the Mattson Formation in the Liard Range in the Northwest Territories and are the only known identifiable ...
Jerzy Fedorowski   +2 more
doaj   +1 more source

New archaeorthopteran insects from the Carboniferous of Poland: Insights into tangled taxonomy [PDF]

open access: yesActa Palaeontologica Polonica, 2019
Archaeorthoptera is a high rank insect taxon comprising Orthoptera as well as the extinct orders Titanoptera and Caloneurodea, and several other late Paleozoic groups formerly assigned to polyphyletic Protorthoptera.
Tomáš Dvořák   +3 more
doaj   +1 more source

First xenacanthid shark from the Pennsylvanian (Moscovian) of the Northern Caucasus (Russia) [PDF]

open access: yesFossil Record, 2007
The occurrence of Triodus teberdaensis n. sp. teeth from the Pennsylvanian Tolstiy Bugor Formation (Moscovian) of Karachay-Cherkess Republic is the first evidence of xenacanthid remains from the Caucasus.
O. Hampe, A. Ivanov
doaj   +5 more sources

A new species of leafy calamite stem from the Pennsylvanian (Bolsovian) of the South Wales Coalfield

open access: yesActa Palaeobotanica, 2020
Large leafy calamite stems are very rare in the fossil record. One such leafy stem is described as a new species, Calamites cambrensis, from shales above the No 2 Rhondda Seam in the Bolsovian of the South Wales Coalfield.
Barry A. Thomas
doaj   +1 more source

Debate on human aging and lifespan [PDF]

open access: yesBioImpacts, 2017
The issue of human lifespan has long been a matter of controversy among scientists. In spite of the recent claim by Dong et al that human lifespan is limited to 115 years, with the mounting improvements in biotechnology and scientific understanding of ...
Mohammad A. Rafi, Abass Alavi
doaj   +1 more source

Early Pennsylvanian Odonatoptera from the Xiaheyan locality (Ningxia, China): new material, taxa, and perspectives [PDF]

open access: yesFossil Record, 2013
Data on Odonatoptera species from the Xiaheyan locality (Ningxia, China; Early Pennsylvanian) described so far are complemented based on abundant new material. Several taxonomic and nomenclatural adjustments are proposed.
Y. Li, O. Béthoux, H. Pang, D. Ren
doaj   +5 more sources

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