Results 41 to 50 of about 5,951 (224)

Siphonotretoid brachiopods – a thorny problem [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Siphonotretoids are presently placed within the subphylum Linguliformea and the class Lingulata, where they constitute a small, relatively short-lived superfamily and order, appearing near the end of the mid-Cambrian, with most forms becoming extinct ...
Lars E. Holmer   +4 more
doaj   +1 more source

The Middle Cenomanian basal series of Planinica, Western Serbia [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2002
Sedimentary rocks of the Upper Cretaceous basal series found at the village of Planinica, Western Serbia, are composed of thick coarse clastics and beds and intercalations of medium- to fine-grained clastics. The series lies transgressively over Jurassic
Rabrenović Dragoman   +5 more
doaj   +1 more source

Drill holes in Australian Cainozoic brachiopods

open access: yes, 2008
The fossil record of drill holes in marine invertebrates has received a considerable amount of interest from paleontologists, primarily due to its importance for reconstructing the history of interactions between drilling predators and their prey.
McNamara, K. J.   +2 more
core   +2 more sources

Biometric Relationship Between Growth Pattern and Biological Reproduction of a Living Fossil Benthic Brachiopods (Lingula anatina Lamarck, 1801) in Aceh Northern Shore

open access: yesIlmu Kelautan, 2023
Brachiopods are a group of ancient marine invertebrates that are still found today, so they are known as "living-fossil". The purpose of this study was to determine reproductive biology through sex ratio approach, gonad maturity stages, body mass weight ...
Chitra Octavina   +8 more
doaj   +1 more source

A multiproxy study of the Puhmu core section (Estonia, Upper Ordovician): consequences for stratigraphy and environmental interpretation [PDF]

open access: yesEstonian Journal of Earth Sciences, 2017
A multiproxy study of the Katian and Hirnantian in the Puhmu core in NE Estonia resulted in new data on chitinozoan and brachiopod biostratigraphy. Some mass occurrences of dasycladacean algae are tied to small early Katian ‘reefs’.
Dimitri Kaljo   +3 more
doaj   +1 more source

Brachiopod Molecular Phylogeny [PDF]

open access: yes, 2018
Analysis by parsimony, maximum likelihood and distance methods of newly determined nuclear-encoded SSU rRNA gene sequences from 23 species of articulate brachiopods, six inarticulate brachiopods, two phoronids and an ectoproct, together with other sequences from published and unpublished sources show that lophorates cluster with protostome, not ...
Cohen, B.L., Gawthrop, A.B.
openaire   +1 more source

Linguliformean Brachiopods from the Las Plantas Formation (Ordovician, Sandbian), Argentine Precordillera [PDF]

open access: yes, 2018
This paper is a brief contribution to the taxonomy of the still poorly known Ordovician lingulate brachiopods of Argentina. A linguliform brachiopod fauna from the Las Plantas Formation (Sandbian, Ordovician) in the northern Precordillera, west-central ...
Lavié, Fernando Julián   +1 more
core   +1 more source

Seawater carbonate chemistry and lithium elemental and isotope systematics of cultured brachiopods

open access: yes, 2021
Lithium has proven a powerful tracer of weathering processes and chemical seawater evolution. Skeletal components of marine calcifying organisms, and in particular brachiopods, present promising archives of Li signatures.
Henkel, Daniela   +6 more
core   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska   +6 more
wiley   +1 more source

Changes in the generic diversity of brachiopods at the intervals of the largest Phanerozoic mass extinctions

open access: yesИзвестия высших учебных заведений: Геология и разведка
Background. Brachiopods evolved throughout the Phanerozoic, and their study contributes to the knowledge of the largest biotic crises. Accumulation and revision of paleontological information require regular re-evaluation of the influence of these crises
D. A. Ruban
doaj   +1 more source

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