Precambrian sponges with cellular structures

  title={Precambrian sponges with cellular structures},
  author={Li and Chen and Hua},
  volume={279 5352},
  • Li, Chen, Hua
  • Published 6 February 1998
  • Geography, Biology
  • Science
Sponge remains have been identified in the Early Vendian Doushantuo phosphate deposit in central Guizhou (South China), which has an age of approximately 580 million years ago. Their skeletons consist of siliceous, monaxonal spicules. All are referred to as the Porifera, class Demospongiae. Preserved soft tissues include the epidermis, porocytes, amoebocytes, sclerocytes, and spongocoel. Among thousands of metazoan embryos is a parenchymella-type of sponge larvae having a shoe-shaped morphology… 

Siliceous spicules in a vauxiid sponge (Demospongia) from the Kaili Biota(Cambrian Stage 5), Guizhou, South China

Energy Dispersive X-Ray Spectrometry and Raman spectroscopy analysis indicate the presence of silica in the skeletal elements of these fossils, suggesting that this taxon possessed a skeleton comprised of spicules, the first confirmation of siliceous skeletal elements in fossils of the family Vauxiidae.

Records of a new spongelike group in the Riphean biota

New microfossils of presumably sponge organization grade have been recorded in the Meso-Neoproterozoic boundary beds of the Riphean Lakhanda Formation (Maya River, Uchur-Maya Region, southeastern

Sponges: New Views of Old Animals1

Sponges diverged from other animals earlier in evolutionary history than any other known animal group, extant or extinct, with the first sponge-related record in earth history found in 1.8 billion year old sediments.

Skeletogenesis in problematic Late Proterozoic Lower Metazoa

This paper discusses supporting structures in problematic Late Precambrian Lower Metazoa, sponge and cnidarian affinity. These structure include aggregates of agglutinated mineral particles;

Hexactinellid Sponge Spicules in Neoproterozoic Dolostone from South China

Abstract. Sponge spicules were extracted from dolostone in the lower part of the Neoproterozoic Doushantuo Formation in the Yangtze Gorges area (South China), which has an age of ∼630 million

Phragmodictya jinshaensis sp. nov., a hexactinellid dictyosponge from the Cambrian of Jinsha, south China

A new fossil species from Cambrian strata of Jinsha, south China, is interpreted as the earliest known hexactinellid dictyosponge. Phragmodictya jinshaensis sp. nov. occurs within the Niutitang

Precambrian animal diversity: putative phosphatized embryos from the Doushantuo Formation of China.

Putative fossil embryos and larvae from the Precambrian phosphorite rocks of the Doushantuo Formation in Southwest China have been examined in thin section and identified what appear to be modern cnidarian developmental stages, including both anthozoan planula larvae and hydrozoan embryos.

Palaeophragmodictya spinosa sp. nov., a bilateral benthic organism from the Vendian of the Southeastern White Sea Region

Bilateral symmetry discovered in the ontogeny of Palaeophragmodictya spinosa sp.

Palaeontology of sponges - : a review

The majority of palaeontologic studies are concerned with taxonomic aspects of fossil sponge faunas, but investigations of the microstructure of the calcareous skeleton, of phylogeny (especially of the early forms), and of various aspects of their ecology have produced important results.



Ediacarian sponge spicule clusters from southwestern Mongolia and the origins of the Cambrian fauna

Carbon and strontium isotopic data are used to show that the earliest sponge spicule clusters and associated phosphatic sediments (with Anabarites ) from southwestern Mongolia are of Ediacarian age.

The Late Precambrian fossil Kimberella is a mollusc-like bilaterian organism

This work reconstructs Kimberella as a bilaterally symmetrical, benthic animal with a non-mineralized, univalved shell, resembling a mollusc in many respects, important evidence for the existence of large triploblastic metazoans in the Precambrian and indicates that the origin of the higher groups of protostomes lies well back in the precambrian.

Vendozoa: Organismic construction in the Proterozoic biosphere

Seilacher, Adolf 1989 07 15: Vendozoa: Organismic construction in the Proterozoic biosphere. Lethaia, Vol. 22. pp. 229–239. Oslo. ISSN 0024–1164. Ediacara-type impressions of large, but flat and

Functional biology and ecology of Archaeocyatha

The Archaeocyatha, an early Cambrain group of calcified sponges, were the first skeletal metazoans to develop a modular habit and to be associated with reefs, and show the predicted ecological changes with the appearance of modularity.

New data on multicellular thallophytes and fragments of cellular tissues from Late Proterozoic phosphate rocks, South China

New fossil forms discovered from the local rock bed demonstrate the possible existence of a community with relatively high diversity in Wengan shallow sea and confirms that an evolutionary radiation of mctaphylcs look place during Ediacaran time, shortly after the Nantuo glacial epoch.

Biostratigraphic and Geochronologic Constraints on Early Animal Evolution

Two distinct evolutionary pulses, represented by the Vendian Ediacaran fauna and Cambrian small shelly faunas, are generally thought to characterize the emergence of macroscopic animals at the end of

Monophyletic origins of the metazoa: an evolutionary link with fungi

A phylogenetic framework inferred from comparisons of small subunit ribosomal RNA sequences describes the evolutionary origin and early branching patterns of the kingdom Animalia and shows the animal lineage is monophyletic and includes choanoflagellates.

The Dawn of Animal Life: A Biohistorical Study

Reproduction of marine invertebrates

Reproduction of Marine Invertebrates.Vol. 1: Acoelomate and Pseudocoelomate Metazons. Edited by Arthur C. Giese and John S. Pearse. Pp. xi+546. (Academic: New York and London, 1974.) $38; £13.45.

Molecular Evidence for Deep Precambrian Divergences Among Metazoan Phyla

It is suggested that invertebrates diverged from chordates about a billion years ago, about twice as long ago as the Cambrian, which suggests a prolonged radiation of animal phyla.