Table 1.

Described numbers of living species.

extant order	living described species numbers
Archaeognatha	500
Blattaria	4000
Collembola	9000
Coleoptera	350 000
Dermaptera	2000
Diplura	1000
Diptera	120 000
Embiodea	500
Ephemeroptera	3100
Grylloblattodea	26
Hemiptera	90 000
Hymenoptera	125 000
Isoptera	2900
Lepidoptera	150 000
Mantodea	1800
Mantophasmatodea	15
Mecoptera	600
Megaloptera	270
Neuroptera	6010
Odonata	5500
Orthoptera	20 000
Phasmatodea	3000
Phthiraptera	4900
Plecoptera	2000
Protura	600
Psocoptera	4400
Raphidioptera	220
Siphonaptera	2500
Strepsiptera	550
Trichoptera	11 000
Thysanoptera	5000
Zoraptera	32
Zygentoma	400