Phylogenetic position of sponges in early metazoan evolution and bionic applications of siliceous sponge spicules

2007 ◽  
Vol 52 (22) ◽  
pp. 3029-3040 ◽  
Author(s):  
Werner E. G. Müller ◽  
XiaoHong Wang ◽  
LingSen Zeng ◽  
Heinz C. Schröder
Keyword(s):  
Phylogenetic Position ◽  
Siliceous Sponge ◽  
Metazoan Evolution ◽  
Sponge Spicules ◽  
Early Metazoan

scholarly journals Developmental processes in Ediacara macrofossils

2021 ◽  
Vol 288 (1945) ◽  
pp. 20203055
Author(s):  
Scott D. Evans ◽  
Mary L. Droser ◽  
Douglas H. Erwin
Keyword(s):  
Nervous System ◽  
White Sea ◽  
Phylogenetic Position ◽  
Phylogenetic Groups ◽  
Developmental Processes ◽  
Apparent Lack ◽  
Genetic Pathways ◽  
Metazoan Evolution ◽  
Ediacara Biota ◽  
Early Metazoan

The Ediacara Biota preserves the oldest fossil evidence of abundant, complex metazoans. Despite their significance, assigning individual taxa to specific phylogenetic groups has proved problematic. To better understand these forms, we identify developmentally controlled characters in representative taxa from the Ediacaran White Sea assemblage and compare them with the regulatory tools underlying similar traits in modern organisms. This analysis demonstrates that the genetic pathways for multicellularity, axial polarity, musculature, and a nervous system were likely present in some of these early animals. Equally meaningful is the absence of evidence for major differentiation of macroscopic body units, including distinct organs, localized sensory machinery or appendages. Together these traits help to better constrain the phylogenetic position of several key Ediacara taxa and inform our views of early metazoan evolution. An apparent lack of heads with concentrated sensory machinery or ventral nerve cords in such taxa supports the hypothesis that these evolved independently in disparate bilaterian clades.

Carbon Replicas of Siliceous Sponge Spicules

Science ◽  
1967 ◽  
Vol 157 (3788) ◽  
pp. 581-582
Author(s):  
Ryan W. Drum
Keyword(s):  
Siliceous Sponge ◽  
Sponge Spicules ◽  
Carbon Replicas

The Ediacaran biota and early metazoan evolution

1985 ◽  
Vol 122 (1) ◽  
pp. 77-81 ◽  
Author(s):  
S. Conway Morris
Keyword(s):  
Metazoan Evolution ◽  
Early Metazoan

Pb–Pb ages of Neoproterozoic Doushantuo phosphorites in South China: constraints on early metazoan evolution and glaciation events

2004 ◽  
Vol 132 (1-2) ◽  
pp. 123-132 ◽  
Author(s):  
Duo Fu Chen ◽  
Wei Quan Dong ◽  
Bin Quan Zhu ◽  
Xian Pei Chen
Keyword(s):  
South China ◽  
Metazoan Evolution ◽  
Early Metazoan
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