Difference between revisions of "Why did insects win?"
Devicerandom (Talk | contribs) (→Evolution of Arthropoda: sea scorpions, euthycarcinoid) |
Devicerandom (Talk | contribs) |
||
Line 38: | Line 38: | ||
:* segmentation difference | :* segmentation difference | ||
:* compound vs single eye | :* compound vs single eye | ||
+ | |||
+ | ===Wings problem=== | ||
+ | * It seems that wings arose from pre-crustacean gills. Arachnida precursors (eurypterids?) had no comparable structure to transform into wings. That's why we don't see flying spiders. | ||
+ | |||
+ | ===Metamorphosis problem=== | ||
+ | todo | ||
[[Category:Hobby research]] | [[Category:Hobby research]] | ||
[[Category:Biology]] | [[Category:Biology]] |
Revision as of 10:47, 24 November 2010
It basically starts from this blog post. The question is: why are Insecta the most diverse group of arthropods, if not of living beings, on Earth's land, while Arachnida and other arthropod groups aren't?
Here I collect some material for further posts on the subject.
Contents
Sources
Evolution of Arthropoda
- Marine evolution of Arachnida: "The oldest known scorpions lived around 430 million years ago in the Silurian period, on the bottom of shallow tropical seas.[15] These first scorpions had gills instead of the present forms' book lungs." ( Scorpion )
- Recent evidence for Pancrustacea hypothesis based on nuclear genes phylogenies: Regier et al. 2010
- Rota-Stabelli et al. 2010, mitochondrial genomes from several arthropoda, further Pancrustacea evidence.
- Sea scorpions ( Eurypterida ) gills were in the tail; also no polyramous limbs?
- Euthycarcinoids are a group of primitive arthropods, possibly earliest land dwellers (see Euthycarcinoid ).
Genes in evolution of arthropod body plans
- 1995 landmark paper on crustacean Hox genes vs insect Hox genes, enlightening
- Book that sounds extremly interesting.
- Chelicerate hox
Evolution of insect flight
- Wings as primitive tracheal gills: Evolution_of_insects#Origin_of_insect_flight
- There is molecular evidence: 1997 Nature, as well as confirming Pancrustacea.
- Recent details of molecular mechanism of evolution
- Apterygote insects still want to fly.
Evolution of metamorphosis
- "The evolution of complete metamorphosis in insects is a key innovation that has led to the successful diversification of holometabolous insects," Suzuki et al. (molecular biology of pupa)
Hypothesis
- The Pancrustacea hypothesis is intriguing because Crustaceans show also considerable diversity. Clades away from Pancrustaceans show less diversity? Measurement of morphological characters?
- gg :
- segmentation difference
- compound vs single eye
Wings problem
- It seems that wings arose from pre-crustacean gills. Arachnida precursors (eurypterids?) had no comparable structure to transform into wings. That's why we don't see flying spiders.
Metamorphosis problem
todo