Imadateiella sharovi Martynova 1977

• Main Author: Shrubovych, Julia
• Format: Text
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Entognatha; Protura; Acerentomidae; Imadateiella; Imadateiella sharovi; Kolyma; Yamato; Seta; Magadan; Primorskiy; Tuxen; Siniy; Snow Valley; kolyma river
• Online Access: https://dx.doi.org/10.5281/zenodo.5681421; https://zenodo.org/record/5681421

Imadateiella sharovi (Martynova, 1977) Figs. 11–36, Table 3 Acerella sharovi Martynova 1977: p. 164. Imadateiella sharovi Imadaté 1981: p. 144. Diagnosis. Imadateiella sharovi is characterized by possession of 4 + 4 A -setae on the metanotum, presence of head seta d 6 , presence of seta P 1 a and lack of seta P 3 a on tergites II–VII, presence of seta Pc on sternites VI and VII, long foretarsal sensillum a and short sensilla b and c with c being shorter than b , and by long, setiform seta β 1 on the foretarsus. Material examined. Holotype female and 3 paratype females, in litter under lichens ( Cetraria sp.) and in turf stratum under Lycopodium sp. and Empetrum sp. on slopes in the zone of dwarf pine, Snezhnaya dolina (= Snow Valley), 24 km west of Magadan Town, 18.IX. 1974, coll. D. Berman (Fig. 1, Site 8). Type specimens are preserved in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia. Other material is preserved in SMNH: 7 females, 2 males, 2 preimagoes, in litter on slopes with Pinus sp., Betula sp. and Larix danurica , field station “Aborigen”, Kolyma River, Magadan district, 25.VII. 1979, coll. V. Behan. Redescription. Head setae short, seta d 6 present, setae l 3 and sd 4 setiform, labrum slightly protruded (Figs. 11, 12). Head with frontal pore ( fp ) and pair of clypeal pores ( cp ). Pseudoculus round, small, with short posterior extension, PR = 20–22 (Fig. 12). Maxillary palpi short, basal sensilla short, slender, equal in length (Fig. 13). Labial palp with terminal tuft of setae and slightly expanded basal sensillum (Fig. 14). Maxillary gland with distinctly granulated calyx; large, vesicle-like dilation posterior to calyx and distinct, simple posterior dilation, CF = 5.6–6.1 (Fig. 15). Foretarsus lacking sensillum b’ sensillum t 1 filiform, t 3 leaf-like, other sensilla slender and short (Figs. 16, 17). Sensillum d situated nearer to e than to c a’ close to level of t 2 . Relative length of sensilla: t 3 <e <g <c <b <t 1 < ( t 2 = d ) <a’ < ( a = c’ ) <f . Setae β 1 and δ 4 setiform, subequal to δ 1 length. Claw with small inner tooth, empodial appendage short. BS = 0.5–0.8, TR = 2.4–2.7, EU = 0.1–0.2. Two pores present near bases of sensilla c and g . Body chaetotaxy as in Table 3. Nota with short setiform setae P 1 a and P 2 a (Fig. 18). Length ratio of P 1 : P 1 a : P 2 about 3: 1: 4. Seta P 2 a situated nearer to P 3 than to P 2 . Mesonotum with pores sl and al , metanotum with pores sl only. Prosternum without pore, mesosternum and metasternum with sc pore situated anterior to level of setae M (one specimen with double sc pores on mesosternum) (Figs. 24, 25). Setae M 2 on prosternum and A 2 on all thoracic sternites shorter than other setae, setiform (Fig. 26). Dorsal Ventral Setae A 5 , P 3 and P 4 shorter than accessory setae P 1 a and P 2 a on tergite I (Fig. 19). Lineation on tergites IV– VI with single line in anterior part of tergites (Fig. 20), tergite VII with two distinct lines (Fig. 21). Accessory setae on tergites I–VI setiform, slightly longer than tergite VII setae, 14 and 12 µm, respectively. Pores psm present on tergites I–VI, psl absent, al present on tergites II–VII, al on tergite VII not surrounded by teeth (Fig. 33). Abdominal legs with 4, 2, 2 setae (Figs. 27, 28). Setae of abdominal legs II and III nearly equal in length, 14 and 15 µm, respectively. Sternites I–III with short ciliated line in anterolateral region (Figs. 27, 28), sternite IV with line in anterior region, sternites V–VII with two distinct lines (Figs. 29, 30). Sternal accessory setae slightly shorter (Fig. 32) than those on tergites I–VI (Fig. 31); on segment VII accessory setae equal, 12 µm long. Sternite I with 1 + 1 sal pores (Fig. 27), sternites II–V with spm pore, sternite VI without pores and sternite VII with pore sam on the second transverse line (Figs. 28–30). Abdominal tergite VIII with row of granules in anterior position (Fig. 22), sternite with two rows (Fig. 36). Striate band well developed with distinct striae. Margin of comb VIII with 10 small teeth (Fig. 34). Pore psm on tergite VIII with accompanying teeth. Hind margin of laterotergites and sternites smooth (Fig. 36). Posterior margin of tergite X and XI with very fine serration. Setae 1 and 1 a on tergite IX subequal in length (Fig. 22). Seta 2 a on tergites IX and X shorter than the remaining setae. Dorsal lobe of telson with median pore on a serrated line, ventral lobe with 1 + 1 sal pores. Female squama genitalis with short, conical acrostyli (Fig. 35). Males unknown. Body measurements (13 adults, in µm): body length about 1330, head 138–153, pseudoculus 7, distal part of maxillary gland about 25, pronotal seta 1 30–32, pronotal seta 2 15–20, mesonotal P 1 28–29, mesonotal P 1 a 8– 11, mesonotal P 2 36–39, foretarsus 85–89, claw 32–35, empodial appendage about 4. Chaetal variability . One specimen with a pair of A 1 setae (4 + 4 anterior setae) on mesonotum; two specimens with asymmetrical presence of A 1 setae on mesonotum. One specimen with 4 setae and one other specimen with 5 setae ( P 1 a absent asymmetrically) on sternite VIII. Remarks. The generic position of the taxon originally described as Acerella sharovi has been controversial. Martynova (1977) stated that the species in question belonged in a group with Acerella canadensis (Tuxen, 1955), which was transferred later into Verrucoentomon (Imadaté 1981). However, on the basis of Martynova’s original description, Imadaté (1981) suggested placing this species in the genus Imadateiella . He wrote that "... Acerella sharovi seems characterized by having four pairs of dorsal anterior setae on the thoraces II–III. It is therefore probable that this species takes part in the genus Imadateiella. " Szeptycki (2007) placed this species in Imadateiella without discussion. The differences between Imadateiella and Nipponentomon are not clearcut at present, and Imadateiella needs redefinition and revision (see Discussion). At present I consider this species a member of Imadateiella . Within the genus, the species is most similar to I. shiria (Imadaté, 1964) in possessing seta P 1 a and lacking seta P 3 a on tergites II–VII, having 6 P -setae on sternite III and 6 setae on sternite VIII, in sensillum c being shorter than b and having very short sensilla e and g on the foretarsus. These species differ in the lengths of sensilla a, b and c . Sensillum a is longer in I. sharovi and its apex nearly reaches the base of sensillum t 2 and is shorter in I. shiria (apex of sensillum a slightly surpass the sensillum t 1 base). Sensilla b and c are shorter in I. sharovi (tip of sensillum b not reaching base of γ 3 and tip of c reaching only base of γ 2 ), whereas in I. shiria sensillum b surpasses the base of γ 3 and c reaches the base of γ 3 . Imadateiella sharovi differs from all other species of the genus in the presence of seta Pc on sternite VI. Nipponentomon khabarovskense Nakamura, 2004 Figs. 37–41 Material examined . Holotype male, 5 paratype males and 8 paratype females, Khekhtsyr Experimental Forestry Enterprise, Korfovsky, Khabarovsk, Russia, 9.IX. 2000, coll. M. Hasegawa. These types are preserved in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia. Remarks . Examination of the specimens revealed some characters that needed correction or were omitted in the original description: head setae l 3, sd 4 and sd 5 setiform (Figs. 37, 38); hind marginal cephalic setae d 7 and sd 7 equal in length (about 20 µm); pronotal seta 1 2.5 times longer than seta 2 (57 and 22 µm, respectively); male squama genitalis with 6 + 6 setae. In the original description the author reported 6 A -setae on tergite I, but in fact, there are 8 (setae A 1, A 2, A 3 and A 5 ) (Figs. 39, 40). Sternite III has 3 A -setae in the holotype and in one paratype specimen, but the other 12 paratypes have 5 A -setae on sternite III (Fig. 41). This difference likely is intraspecific variability. Nipponentomon bidentatum Nakamura, 2004 Figs. 42–43 Material examined . Holotype male, paratype female, Khekhtsyr Experimental Forestry Enterprise, Korfovsky, Khabarovsk, Russia, 9.IX. 2000, coll. M. Hasegawa. These type specimens are preserved in the Zoological Institute of the Russian Academy of Sciences, St. Petersburg, Russia. Remarks. The following characteristics are added: head setae l 3, sd 4 and sd 5 sensilliform and blunt apically (Figs. 42, 43); hind margin cephalic setae d 7 and sd 7 of different lengths (28 and 22 µm, respectively); pronotal seta 1 3.4 times longer than seta 2 (58 and 17 µm, respectively); male squama genitalis with 6 + 6 setae. Yamatentomon yamato (Imadaté &Yosii, 1956) Figs. 44–47 Material examined. 27 females, 19 males, 9 preimagos, 38 maturus juniors, 10 larvae II, soil and litter in deciduous woods, Barabash, Khasansky area, Primorskyi Kray, Russia, 27.IX. 2004, coll. R. J. Pomorski; 7 females, 5 males, 2 preimagos, 14 maturus juniors, 9 larvae II, soil in deciduous woods, Chertova Gorka Mt., Kraskino, Khasansky area, Primorskyi Kray, 28. IX. 2004, coll. M. Potapov; 6 females, 2 males, soil and litter of mixed woods, Livadiysky Range, Shkotovsky area, Primorskyi Kray, Russia, 19.IX. 2004, coll. J. Pomorski; 2 females, in decaying wood of Pinus koreensis , the same area, 19. IX. 2004, coll. L. Deharveng & A. Bedos; 5 females, 2 males, 8 maturus juniors, soil in mixed woods, Pidan Mt., Livadiysky Range, Shkotovsky area, Primorskyi Kray, Russia, 19. IX. 2004, coll. L. Deharveng & A. Bedos; 2 females and 1 male, soil in cedar woods, Siniy Range, near Spassk, Primorskiy Kraj, Russia, 4.VII. 2008, coll. N. Rjabinin; 3 females, 2 males, 1 maturus junior, 1 larva II, soil and litter in mixed forest Ussuriyskiy Reserve, near entrance, Ussurijskiy Kraj, Russia, 5.X. 2004, coll. M. Potapov. All of these specimens are preserved in SMNH. Remarks. The specimens listed above agree well with published description. The following characters are added: foretarsal setae β 1 and δ 4 long, setiform (Figs. 44, 45); male squama genitalis with 7 + 7 setae (Fig. 46); sternites VI and VII with a group of adjacent sam pores, placed on the anterior cuticular line, and a pair of spsm pores (Fig. 47). Callientomon chinensis Yin, 1980 Figs. 48–57 Material examined. Two female specimens, collected in the Primorskyi Kray (detritus without gravel, Sukhodol River, Anisimovka, Livadiysky range, Skotovsky area, coll. J. Pomorski, 21.IX. 2004; soil, forest, Barabash, Khasansky area, coll. L. Deharveng & A. Bedos, 27.IX. 2004). These specimens are deposited in SMNH. Remarks . The examined specimens differ from the type material in having 6 A -setae on tergite I (Fig. 48), whereas in the type specimens only 4 setae are mentioned (Yin 1980). Tergites IX and X comprise 12 and 10 setae respectively, not 10 and 8 setae, as was mentioned by Yin (1980). Tergite XI has 6 setae (Fig. 49), rather than 4 setae as in the type specimens. The prosternum in one specimen possesses 4 + 4 A - and M -setae (Fig. 50). Another specimen has 2 + 4 A - and M -setae, whereas in the original description only 2 + 2 A - and M -setae were observed. In the description it was stated that the mesosternum and metasternum each had 5 A -setae, but in the two examined specimens the metasternum has 7 A -setae (Figs. 51, 52). Several characters are corrected or added based on the specimens at hand: tergite I with 10 P -setae (Fig. 48); accessory setae on tergites and sternites short and blunt (Fig. 53), longer only on sternite VII. Foretarsal setae β 1 and δ 4 short and setiform (Figs. 54, 55). Sternite I with a pair of sal pores (Fig. 56); sternites from V to VII each with a single posteromedial pore spm (Fig. 57). Despite the apparent differences between the type specimens and the two specimens at hand, the shapes of the foretarsal sensilla and the lengths of the foretarsi are similar. The differences between the type material and these two specimens seem to be only intraspecific variation and so I consider the specimens to be C. chinensis. : Published as part of Shrubovych, Julia, 2014, Identification and character analysis of the Acerentomidae (Protura) of the northeastern Palearctic (Protura: Acerentomidae), pp. 136-164 in Zootaxa 3755 (2) on pages 143-149, DOI: 10.11646/zootaxa.3755.2.2, http://zenodo.org/record/228438 : {"references": ["Martynova, E. F. (1977) Acerella sharovi sp. n. (Protura, Acerentomidae) from Magadan district. Zoologicheskii Zhurnal, 56, 164 - 167. [in Russian]", "Imadate, G. (1981) Occurence of Nosekiella (Protura, Acerentomidae) in Japan. Annotationes Zoologicae Japonenses, 54, 142 - 146.", "Szeptycki, A. (2007) Catalogue of the world Protura. Acta Zoologica Cracoviensia, 50, 1 - 210.", "Imadate, G. (1964) Taxonomic arrangement of Japanese Protura (II). Bulletin of the National Science Museum, 7, 263 - 293.", "Nakamura, O. (2004) Protura from Khabarovsk, the Russian Far East. Edaphologia, 75, 17 - 35.", "Imadate, G. & Yosii, R. (1956) Two new species of Protura from Japan. Insecta Samurana, 20, 11 - 16.", "Yin, W. Y. (1980) Studies on Chinese Protura: Description of new species and new genera of the family Acerentomidae with discussions on their phylogenetic significance. Contributions from Shanghai Institute of Entomology, 1, 135 - 156. [in Chinese with English summary]"]}