Topics
CambrianCountry
VernanimalculaEukaryote
bilaterianAnimal
pharynxAnatomical structure
BilateriaAnimal
Doushantuo FormationHistoric place
ChinaPlace
Ten phosphatized specimens of a small (<180 micrometers) animal displaying clear bilaterian features have been recovered from the Doushantuo Formation, China, dating from 40 to 55 million years before the Cambrian. Seen in sections, this animal (Vernanimalcula guizhouena gen. et sp. nov.) had paired coeloms extending the length of the gut; paired external pits that could be sense organs; bilateral, anterior-posterior organization; a ventrally directed anterior mouth with thick walled pharynx; and a triploblastic structure. The structural complexity is that of an adult rather than a larval form. These fossils provide the first evidence confirming the phylogenetic inference that Bilateria arose well before the Cambrian
The Ediacaran Doushantuo biota has yielded fossils that include the oldest widely accepted record of...
BACKGROUND: Extant cubozoans are voracious predators characterized by their square shape, four evenl...
Molecular clock analyses estimate that crown-group animals began diversifying hundreds of millions o...
Ten phosphatized specimens of a small (<180 micrometers) animal displaying clear bilaterian features...
Three-dimensionally preserved embryos from the Precambrian Ediacaran Doushantuo Formation, Weng'an, ...
The evolutionary divergence of cnidarian and bilaterian lineages from their remote metazoan ancestor...
AbstractThe evolutionary divergence of cnidarian and bilaterian lineages from their remote metazoan ...
Fossils described as Vernanimalcula guizhouena, from the nearly 600 million-year-old Doushantuo Form...
The earliest evolution of the animals remains a taxing biological problem, as all extant clades are ...
Among extant animals, Lophotrochozoa accounts for the majority of phyla. 1 This bilaterian clade rad...
SUMMARY Fossils described as Vernanimalcula guizhouena, from the nearly 600 million-year-old Doushan...
Molecular clock analyses estimate that crown-group animals began diversifying hundreds of millions o...
Simulation studies of the early origins of the modern phyla in the fossil record, and the rapid dive...
The Cambrian explosion was coined to describe the geologically sudden appearance of numerous bilater...
Fossilized invertebrate embryonic and later developmental stages are rare and restricted largely to ...
The Ediacaran Doushantuo biota has yielded fossils that include the oldest widely accepted record of...
BACKGROUND: Extant cubozoans are voracious predators characterized by their square shape, four evenl...
Molecular clock analyses estimate that crown-group animals began diversifying hundreds of millions o...
Ten phosphatized specimens of a small (<180 micrometers) animal displaying clear bilaterian features...
Three-dimensionally preserved embryos from the Precambrian Ediacaran Doushantuo Formation, Weng'an, ...
The evolutionary divergence of cnidarian and bilaterian lineages from their remote metazoan ancestor...
AbstractThe evolutionary divergence of cnidarian and bilaterian lineages from their remote metazoan ...
Fossils described as Vernanimalcula guizhouena, from the nearly 600 million-year-old Doushantuo Form...
The earliest evolution of the animals remains a taxing biological problem, as all extant clades are ...
Among extant animals, Lophotrochozoa accounts for the majority of phyla. 1 This bilaterian clade rad...
SUMMARY Fossils described as Vernanimalcula guizhouena, from the nearly 600 million-year-old Doushan...
Molecular clock analyses estimate that crown-group animals began diversifying hundreds of millions o...
Simulation studies of the early origins of the modern phyla in the fossil record, and the rapid dive...
The Cambrian explosion was coined to describe the geologically sudden appearance of numerous bilater...
Fossilized invertebrate embryonic and later developmental stages are rare and restricted largely to ...
The Ediacaran Doushantuo biota has yielded fossils that include the oldest widely accepted record of...
BACKGROUND: Extant cubozoans are voracious predators characterized by their square shape, four evenl...
Molecular clock analyses estimate that crown-group animals began diversifying hundreds of millions o...
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