Nipponentomon jaceki, Shrubovych, Julia, 2009

Shrubovych, Julia, 2009, Nipponentomon jaceki sp. nov. from the Russian Far East (Protura: Acerentomidae, Nipponentominae), Zootaxa 2231, pp. 55-61 : 55-61

publication ID

https://doi.org/ 10.5281/zenodo.190299

DOI

https://doi.org/10.5281/zenodo.5687302

persistent identifier

https://treatment.plazi.org/id/038B160A-FFDF-0806-728C-39E6FA9741F8

treatment provided by

Plazi

scientific name

Nipponentomon jaceki
status

sp. nov.

Nipponentomon jaceki sp. nov.

Figs. 1–27 View FIGURES 1 – 8 View FIGURES 9 – 15 View FIGURES 16 – 27 , Tables 1–2

Material examined. Type material. Holotype female (slide 18.1a), litter under Acer sp., mixed forest, Mt. Khualaza, 550 m elev., Anisimovka, Livadiysky Range, Shkotovsky area, Primorski Kray, Russia (43°00'15'' North, 132°47'37'' East), 18. IX. 2004, leg. R. J. Pomorski. Eleven paratypes (4 females, 2 males, 2 maturi juniors, 3 larvae II), same data as holotype. Additional specimens: 10 females, 7 males, 5 praeimagos, 3 maturi juniors, and 1 larva II, litter under conifers and in decaying wood, mixed forest, Khualaza Mt., 700 m elev.; 11 females, 6 males, 3 praeimagos, litter under Alnus and Betula spp., 1270 m elev.; 1 female, 1 praeimago, 1 maturus junior, and 1 larva II, in litter under Acer , Ulmus , and Fraxinus spp., lowland deciduous forest at western end of Anisimovka, 19. IX. 2004, leg. R. J. Pomorski, M. Potapov.

Other material: 1 male, decaying wood of Pinus koreensis, Pidan Mt. , 800 m elev., Livadiysky Range, Shkotovsky area, 20. IX. 2004, leg. M. Potapov; 1 female, decaying wood, mixed forest, Ussuriysky reserve, Ussuriysky area, 5. X. 2004, leg. M. Potapov; 1 female, soil and mosses on cliff by sea shore, Care Mramorny, Kraskino, Khasansky area, 28. IX. 2004, leg. M. Potapov; 1 male, soil near Skvoznaya cave, Chondalaz Range, between Nakhodka and Partizansk, Partizansky area, 26. IX. 2004, leg. R. J. Pomorski.

The holotype (slide 18.1a), 22 females, 13 males, 7 praeimagos, 6 maturi juniors and 5 larvae II (slides 18.1–18.18) and other materials are deposited in the collection of the State Museum of Natural History of the National Academy of Sciences of Ukraine, L’viv ( SMNH); 4 females, 2 males, and 1 praeimago (slides 18.19, 18.21) in the collection of M. Potapov; 4 females, 2 males, and 1 praeimago (slides 6546 and 6547) in the collection of the Institute of Systematics and Evolution of Animals of the Polish Academy of Sciences ( ISEA), Kraków, Poland.

All specimens are mounted as microscopic slides in the medium of Faure ( Dunger & Fiedler 1989).

Description. Head setae long, additional (a) and postpseudocular (pp) setae present, dorsal side with 2+2 modified setae, indicated of the arrows in Fig. 1 View FIGURES 1 – 8 . Rostrum very short, rounded ( Fig. 2 View FIGURES 1 – 8 ). Pseudoculus round, with distinct short lever, PR 14–19 ( Fig. 3 View FIGURES 1 – 8 ). Maxillary gland with large, densely granulated calyx; posterior filament short, with bilobed posterior dilation, CF 5.1–7.3 ( Fig. 4 View FIGURES 1 – 8 ). Maxillary palps short, dorsal sensillum shorter and thicker than lateral sensillum ( Fig. 5 View FIGURES 1 – 8 ). Labial palps well developed, with broad basal sensillum ( Fig. 6 View FIGURES 1 – 8 ). Labium with smooth inner margin.

Main setae on nota long ( Fig. 9 View FIGURES 9 – 15 ). Seta M on meso- and metanotum of medium length (seta P1 about 2 times longer than M). Accessory setae P1a and P2a modified, short, stumpy, truncated at the tip; P3a and P4 subequal in length and shape, short, unmodified; P5 a small sensillum. Length ratio of P1: P1a: P2 on mesonotum as 7.6–8.7: 1: 9–10.1. Mesonotum and metanotum with pores al and sl. Prosternum without seta A2, metasternum with 7 anterior setae, A1 absent ( Fig. 10 View FIGURES 9 – 15 ). Setae M2 on prosternum and A2 on meso- and metasternum sensillum-like, rounded at the tip; other setae of normal shape. Prosternum with no pores; meso- and metasternum each with single median pore. Chaetotaxy formula as in Table 1.

TABLE 1. Body chaetotaxy of Nipponentomon jaceki n. sp. a a Boldface: primary and secondary setae; normal print: tertiary setae; italics: setae added in adult stage. Setae in parentheses present or absent in maturus junior.

Foretarsus without sensillum b’; sensillum t1 filiform; t3 leaf-like; d, f and c’ long, nearly seta-like; other sensilla slender ( Figs. 7, 8 View FIGURES 1 – 8 ). Sensillum d close to e. Sensillum b slightly shorter than a and c; g and e shorter than t2; a’ slightly distal to t2, reaching to base of t3. Setae β 1 of normal shape, slightly longer than δ 1 and the same length as δ 2; δ 4 modified, short, thick and truncated on the apex. Claw very long and slender, with small single inner tooth. Empodial appendage short. Length formula of sensilla: t3 <(e = g) <t1 <(b = a’) <(a = c), t2 <d <(c’ = f). BS 0.6–0.8, TR 2.0–2.4, EU 0.1–0.2. Pores present on exterior part of foretarsi near base of sensillum c and sensillum t3.

Chaetotaxy of abdomen as in Table 1. Accessory setae on urotergites I–V sensillum-like ( Figs. 12, 13 View FIGURES 9 – 15 ). Urotergites VI–VII usually lacking P1a; P2a longer and thinner than on preceding tergites, of normal shape ( Fig. 13 View FIGURES 9 – 15 ). Pore psm present on urotergite I–VIII, psl on V–VII, al on II–VII anterior to level of A5. Comb-like structures on lateral side of terga absent ( Fig. 14 View FIGURES 9 – 15 ).

Abdominal legs with 4, 2, 2 setae. Subapical seta of second and third legs nearly as long as apical seta. Accessory setae on urosternites I–VII unmodified. Urosternites I–VII with single median pore, situated in posterior part (between and slightly anterior to setae P1) on I–IV, and in anterior part of sternites (near Ac) on V–VII ( Figs 11, 15 View FIGURES 9 – 15 ).

Abdominal segment VIII with distinct striate band ( Figs.16, 17 View FIGURES 16 – 27 ); tergite and sternite with two irregular rows of small, scattered granules ( Figs. 18, 19 View FIGURES 16 – 27 ); comb VIII with concave hind margin, composed of 8–10 irregular, slender teeth ( Fig. 20 View FIGURES 16 – 27 ). Pore psm with several surrounding teeth ( Fig. 18 View FIGURES 16 – 27 ), other pores absent. Hind margin of sternite smooth, that of laterotergite with small teeth ( Fig. 19 View FIGURES 16 – 27 ). Seta 1a on urotergite IX subequal to seta 1 in length. Seta 2a on urotergites IX and X shorter than the other setae, spine-like. Lateral part of urotergite IX–XI with distinct ciliated lines ( Fig. 21 View FIGURES 16 – 27 ). Hind margin of urotergite IX–XI with distinct ciliation ( Fig. 22 View FIGURES 16 – 27 ). Hind margin of urosternite IX smooth in middle part, with distinct ciliation laterally. Hind margin of urosternite X distinctly ciliated. Dorsal lobe of telson with single median pore ( Fig. 23 View FIGURES 16 – 27 ), ventral lobe with 1+1 obscure anterolateral pores. Hind margin of dorsal lobe smooth ( Fig. 18 View FIGURES 16 – 27 ), that of ventral lobe with delicate serration in central part ( Figs. 19, 22 View FIGURES 16 – 27 ).

Male squama genitalis with 7+7 setae, additional setae (add) present in adult and praeimago ( Figs. 24, 25 View FIGURES 16 – 27 ). Female squama genitalis short, with blunt, bilobed acrostyli ( Figs. 26, 27 View FIGURES 16 – 27 ).

Observed chaetal variability of adults as follows (n = 46): on mesonotum, asymmetrical absence of P2a (on 1 specimen); on metanotum, asymmetrical presence of P2a’ (2); on urotergite VII, asymmetrical presence of P1a (3); on urosternite I, absence of Pc (1); on urosternite IV; absence of Ac (1); on urosternite VI, absence of Ac (3); on urosternite VII, absence of Ac (1).

Etymology. Nipponentomon jaceki is named for my friend and colleague R. Jacek Pomorski.

Diagnosis and discussion. Nipponentomon jaceki sp. n. is similar to N. aureitarsum (Ewing, 1940) , N. bifidum Rusek, 1974 , N. macleani Nosek, 1977 , N. pembertonense Bernard & Biechele, 2008 , N. bidentatum Nakamura, 2004 and N. khabarovskense Nakamura, 2004 ( Tuxen 1964, Rusek 1974, Nosek 1977, Nakamura 2004), in that it does not have a prominent rostrum. The present new species differs from these related species in the shape of comb VIII (with distinctly concave hind margin), from N. aureitarsum , N. bifidum , N. macleani , N. bidentatum , and N. pembertonense in the lack of seta P1a on urotergite VII, from N. bifidum in the structure of the maxillary gland (in N. bifidum the calyx with additional appendage granulated), from N. macleani in the position of sensilla a’ and c’ on foretarsus (in N. macleani the sensillum a’ close to t3, and the sensillum c’ posteriorly to t3), and from N. bidentatum in the presence of additional setae (add) on head.

The new species is most similar to N. khabarovskense . The two species differ in the shape of comb VIII (in N. jaceki the hind margin is concave, in N. khabarovskense the hind margin is straight), shape of the maxillary sensilla (in N. khabarovskense they are seta-like, in N. jaceki they are sensilliform - rounded on the tip and thicker), and in the length of foretarsal sensilla e and g (long in N. khabarovskense and short in N. jaceki ).

Measurement Adult Praeimago Maturus junior Larva II

SMNH

Saskatchewan Museum of Natural History

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