Results 11 to 20 of about 3,109 (199)

The Biodiversity of Peter I Island-The Most Remote Island in the World. [PDF]

Ecol Evol
Peter I Island is one of the most isolated and least visited islands on earth; lying within the Antarctic Polar Front but over 420 km from continental Antarctica. Here we assess the biodiversity of the island from both previous records and our own BioBlitz in January 2022.
Jackson M, Clarkin E, Ryan C, Santangelo M, Stephenson B, Blakeslee M, Forbes S, Kirchner R, Searle Pineda A, Wolff A, Hart T.   +10 more
europepmc   +2 more sources

Exceptionally Preserved Setae: A Possible Morphological Synapomorphy of Cambrian Lophotrochozoans. [PDF]

Evol Dev
The Lophotrochozoans comprise one of the major groups within the animal kingdom, while the relationships within this group remain unclear. We explored the microstructure and formation of setae and suggest that setae may represent a morphological synapomorphy of lophotrochozoans, which is currently dearth of morpho‐ultrastructure and comparative studies
Liang Y, Topper TP, Holmer LE, Hu Y, Liu F, Zhang Z.   +5 more
europepmc   +2 more sources

Aseptella (Brachiopoda) en el paleozoico tardio de Argentina

Spanish Journal of Palaeontology, 2022
Se describen nuevos ejemplares correspondientes a la especie Aseptella aff. patriciae Simanauskas de la Precordillera argentina (cuenca Calingasta-Uspallata). Dicha especie integra una asociación faunfstica ubicada en la parte superior de la Formación El
G. A. Cisterna, T. Simanauskas
semanticscholar   +1 more source

Upper Callovian and Oxfordian molluscs and brachiopods from selected localities of the Kraków-Częstochowa Upland and the Świętokrzyskie Mountains, Poland

Geo&Bio, 2021
The aim of the study was the taxonomic, morphological, ecological and stratigraphic characterization of marine invertebrate groups from the localities of Wiek and Wysoka (Krakow-Częstochowa Upland) and Gnieździska (Świętokrzyskie Mountains). All of these
S. Wszelaki
doaj   +1 more source

New occurrences of Malvinokaffric Chonetoidea (Brachiopoda) in the Paraná Basin, Devonian, Brazil

Revista Brasileira de Paleontologia, 2022
Brachiopods of the superfamily Chonetoidea are abundantly found in Devonian rocks in the Paraná Basin (Brazil). Despite this, only two species were formally known: Pleurochonetes falklandicus and Australostrophia mesembria, while at least 34 other taxa ...
R. Videira-Santos, S. Scheffler, A. C. Fernandes   +2 more
semanticscholar   +1 more source

Evolution of the Cdk4/6-Cdkn2 system in invertebrates. [PDF]

Genes Cells
Hypothesis on the evolution of the Cdkn2 locus. (a) Loss of Cdkn2 occurred multiple times. (b) Evolution of microsynteny at the Cdkn2 locus. Cdkn2e is a hypothetical transient gene. Abstract The cell cycle is driven by cyclin‐dependent kinases (Cdks). The decision whether the cell cycle proceeds is made during G1 phase, when Cdk4/6 functions.
Yuki S, Sasaki S, Yamamoto Y, Murakami F, Sakata K, Araki I.   +5 more
europepmc   +2 more sources

Brachiopod Fauna from the Deep Mediterranean Sea: Distribution Patterns and Ecological Preferences

Diversity, 2022
Compared to their fossil counterparts, living brachiopods are investigated far less often, due to their occurrence in remote environments such as dark caves or deep environments.
Margherita Toma, Francesco Enrichetti, Giorgio Bavestrello, Simonepietro Canese, Alessandro Cau, Franco Andaloro, Michela Angiolillo, Silvestro Greco, Marzia Bo   +8 more
doaj   +1 more source

The nervous system of the most complex lophophore provides new insights into the evolution of Brachiopoda

Scientific Reports, 2021
The lophophore is a tentacle organ unique to the lophophorates. Recent research has revealed that the organization of the nervous and muscular systems of the lophophore is similar in phoronids, brachiopods, and bryozoans.
E. Temereva, T. Kuzmina
semanticscholar   +1 more source

The problematic lingulate brachiopod Aulonotreta from the Ordovician (Dapingian–Darriwilian) of Baltoscandia [PDF]

Estonian Journal of Earth Sciences, 2019
The enigmatic and aberrant lingulate brachiopod Aulonotreta antiquissima (Eichwald) from the Dapingian (Volkhov Stage) Toila Formation of northern Estonia and St Petersburg area (Historical Region of Ingria, Ingermanland, or Inkerinmaa; English, Swedish,
Lars E. Holmer, Liang Yue, Zhiliang Zhang, Zhifei Zhang   +3 more
doaj   +1 more source

The Early Devonian (Emsian) acrotretid microbrachiopod Opsiconidion minor Popov, 1981, from the Alaska/Yukon Territory border and Novaya Zemlya [PDF]

Estonian Journal of Earth Sciences, 2020
New records of the poorly known acrotretid (Biernatidae) microbrachiopod Opsiconidion minor Popov are described from middle Emsian strata of the Ogilvie Formation in east-central Alaska and the adjacent Yukon Territory, Canada, and compared with new ...
Lars E. Holmer, Robert B. Blodgett, Yue Liang, Zhifei Zhang   +3 more
doaj   +1 more source