Why did insects win?
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.
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. These first scorpions had gills instead of the present forms' book lungs." ( Scorpion )
- 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
- Review on PNAS on Hox and arthropoda body plan
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)
- 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
- 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.