taxonID	type	description	language	source
03D37B0BFFD3370F95A543708FCFFD58.taxon	description	(Figs. 1 – 11, Table 1)	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD3370F95A543708FCFFD58.taxon	materials_examined	Material examined. Holotype female (no. 53371), collected in dead leaves, Salt Lake, Utah, USA, 3. VIII. 1937, coll. F. Andre.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD3370F95A543708FCFFD58.taxon	discussion	Remarks. The species was redescribed by Bonet & Tuxen (1960) and by Tuxen (1964) on the basis of the damaged holotype specimen. Some characters not provided in those previous redecriptions are added here.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD3370F95A543708FCFFD58.taxon	description	Additional description. Labium prominnetly protruded; additional cephalic setae d 6 absent on the head (Bonet & Tuxen 1960: Fig. 57). Setae near pseudoculus l 3 and sd 4 setiform, seta l 3 shorter than seta sd 4, 8 μm and 12 μm, respectively (Fig. 1). Maxillary palp with two slender, spindle-shaped sensilla (Fig. 2). Labial palp with tuft of setae, three setae and sausage-like sensillum (Fig. 3). Maxillary gland with small, weakly granulated calyx and large proximal appendage (Tuxen 1964: Fig. 385). Foretarsus as described by Tuxen (1964: Fig. 386). Setae β 1 and δ 4 on foretarsus sensilliform and truncated on the tip, equal in shape and length (16 μm), slightly shorter than δ 5 - seta (Figs. 4, 5). Prosternum with 4 A - setae and 4 M - setae, mesosternum with 5 A - setae and metasternum with 9 A - setae, pair of A 1 - setae present (Figs. 7 – 9). Thoracic tergite I with 3 pairs of A - setae (A 1, 2, 5), not two as was written in Bonet & Tuxen (1960: Fig. 6). All accessory setae on tergites and sternites I – VII long setiform, on sternites slightly shorter. Meso- and metanota with pores al and sl. Meso- and metasterna with a pair of median non- cadjacent sam pores (Figs. 8, 9). Pores psm and psl present on tergites I – VII, al on tergites II – VII. Sternites III – VI each with a median spm pore, situated posteriorly between P 1 setae; sternite VII with one anterior sasm pore situated on connecting line and with a pair of spsm pores (Fig. 10). Sternite VIII with sc pore, sternites XI – X with sam pore (Fig. 11). Hind margin of tergites IX – XI, laterotergites IX – X and sternites IX – X distinctly toothed (Fig. 11; Bonet & Tuxen 1960: Figs. 61, 62). Comb with 7 – 8 long distinct teeth, as illustrated by Tuxen (1964: Fig. 387). Female squama genitalis with stumpy, tripardite acrostyli, as in Tuxen (1964: Fig. 388). Body measurements (female, in μm): body length 1550, head 170, pseudoculus 10, distal part of maxillary gland 35, pronotal seta 1 damaged, pronotal seta 2 20, mesonotal P 1, P 1 a, P 2, P 2 a damaged; foretarsus 122, claw 40, empodial appendage 9.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD1370995A5420C8CB6FED4.taxon	description	(Figs. 12 – 23, Table 2)	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD1370995A5420C8CB6FED4.taxon	materials_examined	Material examined. Holotype, maturus junior (no. 53373) from Difficult Run, Virginia, 4. IX. 1938, coll. H. E. Ewing; one maturus junior from near Prospect Hill, Va., 25. IX. 1921, coll. H. E. Ewing.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD1370995A5420C8CB6FED4.taxon	discussion	Remarks. The species was redescribed by Bonet & Tuxen (1960) and by Tuxen (1964) on the basis of four specimens, one of them a female. I saw only two maturi juniores. Some features, which are not included in previous redescriptions, are added here.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD1370995A5420C8CB6FED4.taxon	description	Additional description. Labium not protruded (Fig. 12). Head dorsally with a pair of short, stout and blunt setae sd 5 (Fig. 14), setae near pseudoculus l 3 and sd 4 longer and setiform (Figs. 13). Additional cephalic setae d 6 absent. Marginal cephalic setae d 7 and sd 7 equal in length (Fig. 15). Labial palp with tuft of setae, three setae and broad sensillum (Fig. 16). Setae β 1 and δ 4 on foretarsus modified: β 1 short, stout and truncated at the tip, δ 4 sensilliform, longer and thinner than β 1, but shorter than δ 5 seta (Figs. 17, 18). Length ratio of P 1: P 1 a: P 2 on mesonotum as 7.0: 1.0: 9.0. Accessory setae P 1 a and P 2 a on nota and all accessory setae on tergites I – VI and sternites IV – VI short, stumpy, truncated on the tip (Fig. 19); on tergite and sternite VII accessory setae setiform (Fig. 20). Setae A 2 on prosternum and A 1 on metasternum absent but may appear in adults. All setae on thoracic sterna and on sternites I – II setiform. Meso- and metanota with pores al and sl. Meso- and metasterna with one median pore (sam). Pores psm present on tergites I – VII (Fig. 21), psl on tergites V – VII, al on tergites II – VI, but absent on tergite VII (Fig. 22). Sternites IV – VII with sam pore (Fig. 23). Sternites VIII – X with a pore (sc) in the central region. Body measurements (maturus junior, in μm): body length 1400, head 150, pseudoculus 8, distal part of maxillary gland 25, pronotal seta 1 56, pronotal seta 2 20, mesonotal P 1 52, mesonotal P 1 a 8, mesonotal P 2 59, mesonotal P 2 a 8; foretarsus 96, claw 35, empodial appendage 5.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD7370B95A540888CABFE44.taxon	description	(Figs. 24 – 38, Table 3)	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD7370B95A540888CABFE44.taxon	materials_examined	Material examined. Neotype female (no. 65892) from Cobell’s Canyon, Claremont, California, January 1938, determined by Hilton as Acerentulus californicus (Bonet & Tuxen 1960).	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD7370B95A540888CABFE44.taxon	discussion	Remarks. Bonet & Tuxen (1960) synonymized this species with Acerentomon occidentalis Ewing, 1940 and redescribed it as Acerentulus californicus Hilton, 1929. Tuxen (1964) confirmed this synonymization and added some additional figures and a chaetotaxic formula.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
03D37B0BFFD7370B95A540888CABFE44.taxon	description	Additional description. Labium protruded; additional cephalic setae d 6 absent on head (Fig. 24). Setae l 3, sd 4 and sd 5 setiform, seta l 3 shorter than setae sd 4 and sd 5, lengths 9 μm and 14 μm, respectively (Figs. 25, 26). Maxillary palps with slender sensilla. Labial palps with tuft of setae, three setae and sausage-like sensillum (Fig. 27). Maxillary gland with small, weakly granulated calyx and large proximal appendage, (Tuxen 1964): Fig. 397), (Fig. 28). Foretarsus as in Tuxen (1964: Fig. 398). Setae β 1 and δ 4 on foretarsus slender and sensilliform, equal in shape and length (16 μm), slightly shorter than δ 5 - seta (Figs. 29, 30). Mesonotum with three pairs of A - setae, metanotum with four pairs of A - setae (Figs. 24, 31). Length ratio of P 1: P 1 a: P 2 on mesonotum as 1.0: 1.0: 1.4. Accessory setae P 1 a on nota and tergites setiform, on nota long, equal with P 1 setae, on tergites shorter (15 – 17 μm), equal in length with setae P 2 a. Setae P 2 a and other accessory setae on nota and sternites short, 8 and 15 μm, respectively (Figs. 24, 31, 32). All setae on thoracic sterna and on abdominal sternites setiform (Figs. 32 – 36). Sternite I with five A - setae (Fig. 37), not with 3 three A - seta as written in Tuxen’s monograph (1964). Meso- and metanota with pores al and sl (Figs. 24, 31). Prosternum with a sam pore (Fig. 34). Meso- and metasterna with two sam pores (Figs. 35, 36). Pores psm present on tergites I – VII, psl present on tergites I – VI (Fig. 31) and absent on tergite VII, al on tergites II – VII. Sternites I – VI with spm pore (Fig. 37). Sternite VII with sam pore, situated on connecting line, and with a pair of spsm pores (Fig. 32). Sternite VIII with a central sc pore, sternites IX – X with sam pore (Fig. 33). Body measurements (female, in μm): body length 1360, head 145, pseudoculus 8, distal part of maxillary gland 25, pronotal seta 1 49, pronotal seta 2 19, mesonotal P 1 38, mesonotal P 1 a 37, mesonotal P 2 54, mesonotal P 2 a 8; foretarsus 92, claw 30, empodial appendage 5.	en	Shrubovych, Julia, Sternalski, Jakub, Smykla, Jerzy (2025): Reexamination of three North American Nipponentomon species (Protura, Acerentomidae, Nipponentominae) with updated key to identification. Zootaxa 5604 (3): 373-382, DOI: 10.11646/zootaxa.5604.3.9, URL: https://doi.org/10.11646/zootaxa.5604.3.9
