Taxonomic revision of the family Eosentomidae (Hexapoda: Protura) from Japan 2701 Nakamura, Osami Zootaxa 2010 2010-12-03 2701 1 109 Nakamura Nakamura 2010 [151,606,943,969] Entognatha Eosentomidae Pseudanisentomon Animalia Protura 11 12 Arthropoda species donan sp. nov.   Figs. 5–6; Table 2   Type specimen.  Holotypefemale ( NSMT–Ap 453), Kubura–dake, Yonaguni Island, Okinawa Prefecture,  150 melevation, litter of a forest dominated by  L. chinensisvar. subglobosa,  19-V-2000, H. Mizushimaleg.   Description.Body length 1138 µm. Head 131 µm long, 100 µm wide. Setae aa, paand m4present, sensilla asand pspresent ( Fig. 5A); seta sp1.3 times longer than p; sensilla ppdistinct ( Fig. 5B), 2 µm long. Labral setae absent ( Fig. 5C). Seta rsinflated, equal to srin length ( Fig. 5C). On maxillary palpus ( Fig. 5D) sensillum mdlonger than ml. On galea ( Fig. 5E) digits similar to each other in shape, O longest and I shortest. Mandible with two apical and one subapical teeth ( Fig. 5F). Clypeal apodemes indistinct. Pseudoculus oval, 16 µm long, with two longitudinal lines, three short lines, and some depressions ( Fig. 5G); PR= 8. Foretarsus length ( Figs. 5H, I) 98 µm; claw 18 µm, TR = 5.7; empodium 17µm, EU = 1.0; sensillum sequal to claw in length. Sensillum t1closer to α 3than to α 3', BS = 1.0; t2thin but not clearly seen; t3slightly broadened; areaching level of t1; blong, reaching nearly to base of β 6; cnot reaching base of γ 3; dshort and broadened, reaching base of α 5; eabsent; f1spatulate; f2short and broadened; grounded-spatulate and long; a'thin; b'1thin, nearer to δ 3'than to δ 4'; b'2thin; c'slender in distal part. Length of middle tarsus 43 µm, length of claw 15 µm; empodium short, less than 1/5 of claw length ( Fig. 5J); hind tarsus 55 µm, claw 16 µm, empodium long, about 2/3 of claw length ( Fig. 5K); on hind tarsus ( Fig. 5K) D2and D4spine-like, D4more slender than D2; D5a thick spine. Tracheal camerae short ( Fig. 6A). Central lobe constricted in middle ( Fig. 6B). Laterostigmata II–IV distinct, without inner structure. On female squama genitalis ( Fig. 6C) caput processus thin and bent toward median of stylus, corpus processus not developed, filum processus short. Male unknown. Chaetotaxy as in Table 2. On thoracic tergites II–III, P1aand P2aseta-like; P1aposterior to P1–P2; P2aabout halfway between P2and P3. P1aon abdominal tergite I, P1aand P2aon II–VI, and P2aon VII filiform and longer than P1; P1aon VII sensillum-like and about one-third length of P1, at hind margin ( Fig. 6D); on tergite VIII ( Fig. 6E) P1a'with basal dilatation and anterior to P2; P2afalcate.   Diagnosis.This new species is similar to  Ps. meihwa( Yin, 1965),  Ps. wanense Zhang, 1987from China( Yin, 1965, 1999; Zhang, 1987),  Ps. babai( Imadaté, 1964), and  Ps. ishiii Nakamura, 1996from Japan( Imadaté, 1964a, 1974b, 1995; Nakamura, 1996) in having foretarsus longer than 90 µm, foretarsal sensillum b'1, anterior setae on abdominal sternite VIII, and six setae on the sternites IX–X. However, the present new species and  Ps. babaiare distinguished from other three by the absence of labral setae (present in other three). This new species is different from  Ps. babaiin pseudoculus with longitudinal lines (no inner structure in  Ps. babai), the position of foretarsal sensillum b'1closer to δ 3'than to δ 4'(halfway between δ 3'and δ 4'in  Ps. babai) and the short empodium on middle tarsus (about 1/3 of claw length in  Ps. babai).   Etymology.The specific name, a noun in apposition, is derived from the old native appellation of Yonaguni Island.   Distribution. Japan(Yonaguni Island, known from only the typelocality). 2000-05-19 NSMT H. Mizushima 150 Yonaguni Island Kubura 12 13 1 Okinawa holotype