Eosentomon inconditum Nakamura 2010, sp. nov.
Creators: name: Nakamura, Osami
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Protura
Eosentomidae
Eosentomon
Eosentomon inconditum

description: <i>Eosentomon inconditum</i> Nakamura sp. nov. Figs. 30–31; Table 13 <b>Type specimens.</b> Holotype female (NSMT –Ap 493), Mt. Akanagi –san, Tokorono, Nikko –shi, Tochigi Prefecture, 36º48'33"N, 139º34'07"E, 1670 m elevation, <i>Sasa</i> field, 21-IX-1996, K. Furuno <i>et al.</i> leg. Paratypes: 2 males (NSMT –Ap 494–495), 1 female (NSMT –Ap 496), same data as for the holotype. <b>Other specimens examined.</b> One female, Ohashi, Minami –ku, Fukuoka –shi, Fukuoka Prefecture, 33º33'27"N, 130º25'56"E, 20 m elevation, grass land, 4-X-2003, T. Kubota leg.; 3 females, Mt. Omoto –dake, Ishigaki Island, Okinawa Prefecture, 24º25'05"N, 124º11'13"E, 170 m elevation, litter of a evergreen broad-leaved forest, 7-III-2002, S. Nagashima leg.; 1 female, Mt. Kubura –dake, Yonaguni Island, Okinawa Prefecture, 24º27'13"N, 122º57'30"E, 150 m elevation, litter of a forest dominated by <i>L. chinensis</i> var. <i>subglobosa</i>, 19-V-2000, H. Mizushima leg. <b>Description.</b> Body length 611 (624–670) µm. Head 100 (104–110) µm long, 71 (74) µm wide. Setae and sensilla on head similar to the preceding species (Figs. 30A–C); seta <i>sp</i> 1.4 times longer than <i>p.</i> On galea (Fig. 30D) digits small, O longer than M and I, M and I close to each other. Mandible with 3 teeth (Fig. 30E). Clypeal apodemes distinct (Figs. 30A, B). Pseudoculus circular with a central depression (Fig. 30F), 11 (12–13) µm long, PR = 10 (9). Foretarsus length (Figs. 30G, H) 68 (70) µm; claw 15 µm, TR = 4.8 (4.9–5.0); empodium equal to claw in length, 14 (14) µm, EU = 1.0; sensillum <i>s</i> slightly longer than claw, 16 (16) µm. Sensillum <i>t1</i> closer to α <i>3</i> than to α <i>3'</i>, BS = 0.9 (0.9); <i>t2</i> thinly spatulate; <i>t3</i> slightly thick, reaching base of γ <i>5</i>; <i>a</i> slightly nearer to γ <i>1</i> than to γ <i>2</i>; <i>b</i> reaching base of β <i>6</i>; <i>c</i> slightly broadened; <i>d</i> broadened, reaching base of α <i>6</i>; <i>e</i> and <i>g</i> roundedly spatulate and long; <i>f1</i> thinly spatulate; <i>f2</i> short; <i>a'</i> at same level with α <i>3</i>; <i>b'1</i> nearer to δ <i>3'</i> than to δ <i>4'</i>; <i>b'2</i> slightly broadened; <i>c'</i> absent. Length of middle tarsus 26 (34–37) µm, length of claw 9 (10–11) µm, empodium shorter than 1/5 of claw length (Fig. 30I), 1 (1–2) µm long; hind tarsus 41 (42–45) µm, claw 11 (10–12) µm, empodium long and about 2/3 of claw length (Fig. 30J), 7 (7–8) µm; on hind tarsus (Fig. 30J) <i>D2</i> and <i>D4</i> similar, spine-like, but slender than <i>D5</i>. Tracheal camerae contracted distally (Fig. 30K). Central lobe trapezoidal (Fig. 30L). Laterostigmata II–III distinct, without inner structure. On female squama genitalis (Fig. 30M) S-shaped sclerotization on processus sternalis, caput processus of duck’s head-type; filum processus long; median and proximo-lateral sclerotization distinct. Male genitalis with short basiperiphallar setae. Chaetotaxy as in Table 13. Chaetotaxy of thorax and abdomen similar to <i>E. dubium</i>, but abdominal tergites V– VI with four pairs of anterior setae, <i>A1, A2, A4</i> and <i>A5</i> (Fig. 31A), and on abdominal tergite VIII <i>P1a’</i> and <i>P2</i> posterior to <i>M4</i> (Fig. 31E). <b>Diagnosis.</b> This new species resembles <i>E. dubium</i> in many respects, but is differs from it by having four pairs of anterior setae on abdominal tergites V–VI (five pairs in <i>E. dubium</i>), the linear shape of foretarsal sensilla <i>a</i> and <i>b</i> (in <i>E. dubium</i>, <i>a</i> broadened, <i>b</i> spatulate). Moreover, the present species (head length 100–110 µm and foretarsus length 68–70 µm) is larger than <i>E. dubium</i> (head length 85–89 µm and foretarsus length 57–58 µm). <b>Etymology.</b> The specific name is derived from the long confusion of this species with <i>E. udagawai</i>. <b>Distribution.</b> Japan (Honshu, Kyushu and Okinawa).
description: Published as part of <i>Nakamura, Osami, 2010, Taxonomic revision of the family Eosentomidae (Hexapoda: Protura) from Japan 2701, pp. 1-109 in Zootaxa 2701</i> on pages 55-58