TABLE 1 in A new species of Ptenothrix Börner, 1906 (Collembola, Symphypleona, Dicyrtomidae) from South Korea

TABLE 1. Characteristics of Ptenothrix koreanensis sp. nov. and three possibly related species of the genus.
CharacteristicsPtenothrix koreanensis sp. nov.P. saxatilis (1)P. higashihirajii (2)P. ciliophora (1)LocalitySouth KoreaSouth KoreaJapanSouth KoreaColor patternheaduniformly black except for a median pale areauniformly black except for a median pale areapale, but mottled in the frontal regionbrownish, but with black pigments near the mouthlarge abdomenwide pale dorsal area, without extra patternswide pale dorsal area, with extra longitudinal stripeswide pale dorsal area, without extra patternsnarrow pale dorsal area, posteriorly with extra longitudinal stripesRatioAnt Ⅰ: II: III: IV1: 6: 6.8: 1.51: 5.4: 5.7: 1.71: 7: 9: 1.81: 8: 10: 2Ⅰe: Ⅰpe (ou1: ou2)1.4: 11.2: 11: 11: 1Chaetae formulaeacanthoid chaetae on clypeal area1, 1, 2, 2, 1, 31, 1, 2, 2, 1, 11, 1, 2, 2, 1, 31, 1, 2, 2, 1, 1labrum chaetae6, 5, 5, 46, 5, 3, 46, 5, 5, 46, 5, 3, 4whorls on Ant III8???acanthoid chaetae on posterior large Abd. (dⅠ–dIII)19, 8, 10???ChaetaeHeadocular (f, o)o much smaller than fo smaller than fo as long as fo smaller than fSmall abdomen (♀)ms1 (a0)smoothciliatedsmoothciliatedms2 (N)ms2 much smaller than as2ms2 as long as as2ms2 much smaller than as2ms2 as long as as2ps1 (sa)regularregularacanthoidregularpi2regularregularacanthoidregularmps’regularregularregularacanthoidmps1, 2, 3all smoothall ciliatedall smoothall ciliatedms4, mps4 (H, T)ms4 as long as mps4ms4 much longer than mps4ms4 as long as mps4ms4 as long as mps4Unguiculussubapical filaments on Ⅰ–IIIall weakly knobbedall knobbedall swollenⅠ and II acute, obtuse on IIIDens parafurcal area Mucroall smooth???mucro teeth (outer, inner)28–33, 28–3739, 4528, 3733, 48

表1 韩国新种棘跳虫（*Ptenothrix koreanensis* sp. nov.）及其该属3个疑似近缘物种的形态特征对比

| 特征大类 | 具体特征 | *Ptenothrix koreanensis* sp. nov. | *P. saxatilis* (1) | *P. higashihirajii* (2) | *P. ciliophora* (1) |
|--------|--------|----------------------------------|---------------------|--------------------------|----------------------|
| 采集地 | - | 韩国 | 韩国 | 日本 | 韩国 |
| 体色斑纹 | 头部 | 除中部具浅色区域外其余均为黑色 | 除中部具浅色区域外其余均为黑色 | 头部色浅，额区具斑驳纹理 | 体色棕褐，口器附近具黑色色素沉着 |
| | 大型腹部 | 宽大的浅色背区，无额外斑纹 | 宽大的浅色背区，具额外纵纹 | 宽大的浅色背区，无额外斑纹 | 窄小的浅色背区，后部具额外纵纹 |
| 比例参数 | 触角Ⅰ:Ⅱ:Ⅲ:Ⅳ | 1:6:6.8:1.5 | 1:5.4:5.7:1.7 | 1:7:9:1.8 | 1:8:10:2 |
| | Ⅰe:Ⅰpe (ou1:ou2) | 1.4:1 | 1.2:1 | 1:1 | 1:1 |
| 刚毛式 | 唇基区棘状刚毛 | 1,1,2,2,1,3 | 1,1,2,2,1,1 | 1,1,2,2,1,3 | 1,1,2,2,1,1 |
| | 上唇刚毛 | 6,5,5,4 | 6,5,3,4 | 6,5,5,4 | 6,5,3,4 |
| | 触角Ⅲ轮状突 | 8 | ??? | ??? | ??? |
| | 后腹部大型体节（dⅠ–dⅢ）棘状刚毛 | 19,8,10 | ??? | ??? | ??? |
| 头部眼区刚毛 | (f, o) | 刚毛o远小于f | 刚毛o远小于f | 刚毛o与f等长 | 刚毛o远小于f |
| 雌性小型腹部 | ms1(a0) | 光滑 | 具纤毛 | 光滑 | 具纤毛 |
| | ms2(N) | ms2远短于as2 | ms2与as2等长 | ms2远短于as2 | ms2与as2等长 |
| | ps1(sa) | 规则 | 规则 | 棘状 | 规则 |
| | pi2 | 规则 | 规则 | 棘状 | 规则 |
| | mps’ | 规则 | 规则 | 规则 | 具纤毛 |
| | mps1,2,3 | 均光滑 | 均具纤毛 | 均光滑 | 均具纤毛 |
| | ms4, mps4(H,T) | ms4与mps4等长 | ms4远长于mps4 | ms4与mps4等长 | ms4与mps4等长 |
| 爪部特征 | Ⅰ–Ⅲ节亚顶端丝 | 均具弱瘤突 | 均具瘤突 | 均膨大 | Ⅰ、Ⅱ节尖锐，Ⅲ节钝圆 |
| 齿管叉区与爪突 | - | 均光滑 | ??? | ??? | ??? |
| 爪突齿数 | 外、内侧 | 28–33, 28–37 | 39, 45 | 28, 37 | 33, 48 |