Timema

Timema is a genus of short-bodied, somewhat thicker stick insects. They are native to the far western United States.^[1][2][3]

Timema
Timema genevievae on the leaves of chamise (Adenostoma fasciculatum).
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Phasmatodea
Family:	Timematidae
Genus:	Timema Scudder, 1895
Species
21, and see text
Geographical distribution of Timema species in North America (Law & Crespi, 2002). T. morongense is found west of T. chumash but the extent of its full range is unknown.[1]

Timema poppensis camouflaged on its host, Sequoia sempervirens (redwood)

Compared to other stick insects (order Phasmatodea), the genus Timema is basal. It is the earliest living branch to diverge from the phylogenetic tree of the Phasmatodea. To emphasize this, all other stick insects are sometimes described as "Euphasmatodea."

Five of the 21 species of Timema are parthenogenetic, including two species that have done sexual reproduction for a million years. This is the longest known asexual period for any insect.^[4]

Timema sticks are night-feeders: they spend daytime resting on the leaves or bark of the plants they feed on. They are camouflaged. Timema species have colours (green, gray, or brown) and patterns (stripes or dots) which match their background.^[5][6]