Key of Japanese Protura

Key to family

• 1　Thorax II-III with spiracles.................2
• -　Thorax II-III without spiracle.................3
• 2　Body without pectinated structure......................Eosentomidae
• -　Body with pectinated structure................Sinentomidae
• 3　Abdominal appendages II-III two-segmented with a terminal vesicle.........Protentomidae
• -　Abdominal appendages II-III one-segmented..................Acerentomdiae

• 1　Foretarsal senseilla e present.......... Eosentomon
• -　Foretarsal senseilla e absent.......... 2
• 2　Empodium of hind tarsus long and more than 1/2 of the claw....Pseudanisentomon
• -　Empodium of hind tarsus normal and shorter than 1/5 of the claw....Paranisentomon

• 1　Empodium of hind tarsus long and more than 1/2 of the claw..........2
• -　Empodium of hind tarsus normal and shorter than 1/5 of the claw..........3
• 2　Abdominal sternite VIII with seven posterior setae.............E. udagawai Imadate, 1961
• -　Abdominal sternite VIII with nine posterior setae.............E. novemchaetum Yin ？
• 3　Pseudoculus with a few group of minute globules.....4
• -　Pseudoculus without globules............... 5
• 4　Foretarsal sensilla b'1 absent..................E. toi Imadate, 1964
• -　Foretarsal sensilla b'1 present..................E. tokui Imadate, 1974
• 5　Foretarsal sensilla b'1 absent..................6
• -　Foretarsal sensilla b'1 present..................8
• 6　Foretarsal sensilla t1 nearer to α3' than α3,accessory seta P1a on abdominal tergite VII in same level with P1-2... E. kumei Imadate et Yosii, 1959
• -　Foretarsal sensilla t1 nearer to α3 than α3',accessory seta P1a on abdominal tergite VII posterior to P1-2...7
• 7　Tergite V with four pairs of anteior setae (A1,2,4,5), six setae on sternites IX-X,foretarsus 60-70μm...E. topochi Imadate, 1964
• -　Tergite V with five pairs of anteior setae (A1,2,3,4,5), four setae on sternites IX-X, foretarsus 100μm...E. yezoense Nakamura, 1983
• 8　Foretarsal sensilla b'1 nearer to δ3' than δ4'....................9
• -　Foretarsal sensilla b'1 between δ3' and δ4................10
• 9　Foretarsal sensilla b'1, c thin, Tergite VI with three pairs of anteior setae (A1,2,4)....E. kimum Imadate, 1964
• -　Foretarsal sensilla b'1, c broad, Tergite VI with one or two pairs of anteior setae ((A1),4)..E. nupri Nakamura, 1983
• 10　Accessory seta P1a on abdominal tergite VII in same level with P1-2..............E. sakura Imadate et Yosii, 1959
• -　　Accessory seta P1a on abdominal tergite VII posterior to P1-2.............11
• 11　Sternite VIII with anterior setae.............12
• -　　Sternite VIII without anterior setae.......15
• 12　Foretarsal sensilla b'1 nearer to δ3' than δ4'.................E. cf. udagawai
• -　　Foretarsal sensilla b'1 between δ3' and δ4.............13
• 13　Tergite VII with four pairs of anteior setae (A1,2,4,5)...........E. konsenense Imadate, 1994
• -　　Tergite V with two pairs of anteior setae (A4,5)............14
• 14　Foretarsal sensilla t1 nearer to α3' than α3、a' at same level with α3......E. asahi Imadate, 1961
• -　　Foretarsal sensilla t1 nearer to α3' than α3、a' at same level with t1.....E. juni Imadate, 1994
• 15　Sternite VIII with posterior central seta (Pc)...........16
• -　　Sternite VIII without posterior central seta (Pc)...........17
• 16　Foretarsal sensilla t1 nearer to α3 than α3', abdominal tergites V-VI with three pairs of anteior setae (A1,4,5)....E. tokiokai Imadate, 1964
• -　　Foretarsal sensilla t1 between α3 and α3', abdominal tergites V-VI with two pairs of anteior setae (A4,5)...E. dounanense Imadate, 1994
• 17　Foretarsal sensilla t1 nearer to α3 than α3', abdominal tergite VI with two pairs of anterior setae (A4,5), VII with one pair(A5)......E. pacificum Imadate et Yosii, 1959
• -　　Foretarsal sensilla t1 nearer to α3' than α3, abdominal tergite VI with four pairs of anterior setae (A1,2,4,5), VII with two pairs (A4,5) ..E. asakawaense Imadate, 1961

• 1　Pseudoculus simple, foretarsus 80-103μm.............P. babai (Imadate, 1964)　ババカマアシムシ
• -　Pseudoculus with striae、foretarsus 120μm..........P. ishiii Nakamura, 1996

Eosentomidae　｜　Sinentomidae　｜　Protentomidae　｜　Acerentomidae