Biology 3484A/B Lecture Notes - Lecture 1: Arthropod
29 May 2016
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To the scientific world they have not been official described. Arthropoda: common trait that makes them a monophyletic group is an exoskeleton (insects, crabs, lobsters, shrimps, spiders, ticks, mites, scorpions, millipedes, centipedes) Beetles are a hyper diverse taxa (insects are the most common among arthropoda) Estimating the total number of species on earth: Terry l. erwin , 1982; landmark study. # beetle specie sin canopy of single tropical tree # tropical tree species= 50,000 What he deducted form his study though results controversial, first study to attempt to study total # Model b: 2. 5 million conclusion: 2/3 of arthropods still await discovery and description (r. n. may, Estimated total # species: ~8. 7 million **know this** also 1600 species are described each year. 6,200/ year **know this*: ~ 3. 7 million would take about 596. 7 years as proposed by hamilton, ~8. 7 million would take about 1403. 22 years as proposed by mora et al, ~ 30 million would take about 4838. 7 years.
