Classification
Timema is the only member of the family Timematidae and the suborder Timematodea. Their clade is considered considered basal to the order Phasmatodea; that is, many scientists believe that Timema-type stick insects represent the earliest "branch" to diverge from the phylogenetic tree that gave rise to all the stick insects of Phasmatodea. This primal distinction is referenced by the name "Euphasmatodea", which is given to all the clades of Phasmatodea other than the suborder Timematodea.
Twenty-one species have been described; in addition there is at least one undescribed species known to exist:
- Timema bartmani
- Timema boharti
- Timema californicum
- Timema chumash
- Timema coffmani
- Timema cristinae
- Timema dorotheae
- Timema douglasi
- Timema genevieve
- Timema knulli
- Timema landelsensis
- Timema monikensis
- Timema morongensis
- Timema nakipa
- Timema nevadense
- Timema petita
- Timema podura
- Timema poppensis
- Timema ritensis
- Timema shepardi
- Timema tahoe
- Timema sp. nov. on limber pine
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