Gracilentulus chichibuensis Nakamura, 1995

Nakamura, Osami, 2021, The Japanese species of the genus Gracilentulus (Protura: Acerentomidae), Zootaxa 4991 (2), pp. 271-294 : 284-285

Gracilentulus chichibuensis Nakamura, 1995

Fig. 10

Gracilentulus chichibuensis ; Nakamura,1995, pp. 1–8, Figs 1 –15.- Szeptycki, 2007, p. 59.-Nakamura, 2011, p. 38.

Materials examined. Holotype male (NSMT-Ap 417), allotype female (NSMT-Ap 418), paratype female (NSMT- Ap 420), Mino-yama, Minano-machi, Saitama Prefecture, deciduous broad-leaved forest dominated by Quercus serrata and Acer spp. , elev. 500 m, 6-VI-1988, O. Nakamura leg.

Diagnosis. Labial palpus with four setae; foretarsal sensillum t1 posterior to α3; a not surpassing base of c; b not surpassing base of f; posterior accessory setae P1a and P2a on thoracic tergites II–III lanceolate microchaetae; P3 on abdominal tergites VI–VII same row with other posterior setae.

Supplementary notes on description. Cephalic setae l3, l5, sd4, sd5 short setiform, about 5 μm; seta d6 present; seta sd7 1.3–1.7 times longer than d7; CF = 8–9; pore fp present ( Fig. 10A ). P1a on thoracic tergites II–III halfway between P1 and P2; P2a near to P3. 1 and 2 on thoracic tergite I 22–25 and 14 μm; P1, 1a and P2 on II 20, 2–3 and 24–28 μm. P1a on abdominal tergites I–VII near to P1; P2a on VI–VII slightly nearer to P3. P1, P1a and P2 on abdominal tergite VI 22–23, 4–5 and 26–27 μm; P1, P1a and P2 on VII 25–26, 5 and 26–27 μm. Pore psm on abdominal tergite VIII with accompanying teeth ( Fig. 10B ). Male squama genitalis with 6+6 setae ( Fig. 10C ).

Distribution. Japan (Honshu)

Figures

FIGURE 1. Gracilentulus macrotarsus sp. nov., holotype (NSMT-Ap 556). A) head, dorsal view; B) dorsal (left) and ventral (right) sensilla on maxillary palpus; C) labial palpus; D) canal of maxillary gland; E) pseudoculus; F) abdominal appendage II; G) comb on abdominal tergite VIII; H) female squama genitalis. Arrow indicates a pore. Abbreviation: fp, frontal pore. Scale bars: A, 20 μm; B, D–H, 10 μm; C, 5μm.

FIGURE 10. Gracilentulus chichibuensis Nakamura. A) head, dorsal view; B) pore psm on abdominal tergite VIII; C) male squama genitalis. A–B, allotype (NSMT-Ap 418); C, holotype (NSMT-Ap 417). Abbreviations: fp, frontal pore; spm, sternal posteromedial pore. Arrows indicate pores. Scale bars: 20 μm for A; 10 μm for B–C.