Table 2 in Long distance dispersal and pseudo-cryptic species in Gastrotricha: first description of a new species (Chaetonotida, Chaetonotidae, Polymerurus) from an oceanic island with volcanic rocks

Table 2 (continued on next page). Morphometric features of Polymerurus insularis sp. nov. All scale lengths for which the scale type is not specified are from Type 1 scales. Abbrevation: N = total number of measured adult specimens. FeaturesRange (µm)Mean (µm)NTotal body length215–4083225Body length (furcal rami excluded)139–3082225Furcal rami length91.5–94.5932Furcal rami + adhesive tubes length109–1171132Adhesive tubes length16–2319.52Furca base width26.5–27.5271Number of furcal rami segments per side19–21201Length of ornamentation bristles on the furcal rami segments4–863Body width at head24–42324Body width at medium length31–55404Body width at furca base23–25244Diameter of mouth ring8–13103Number of cephalic lobes331Number of head cilia tufts443Length of first cilia tuft9–1210.51Length of second cilia tuft11–19.5141Cephalion length19–25233Cephalion width20–36282Lateral projections (lappets) length10–18143Pleurae length12–15143Hypostomium length13–17152Pharynx length74741Pharynx width at upper length19191Pharynx width at medium length25251Pharynx width at pharingeointestinal junction27271Egg width30301Protonephridia length1051051Length of locomotory cilia5–8.571Total number of longitudinal columns of scales42421Number of scales in a single longitudinal column55551Total number of horizontal rows of scales64641Number of scales in a single horizontal row10101Length of neck dorsolateral scales3.5–8.564Length of middle trunk dorsal scales5.5–98.52Length of middle trunk lateral scales6.5–118.52Length of rear dorsolateral scales7.5–962Length of rear triangular scale (Type 2)5–763Length of small rounded scales with posterior spines (Type 3)4.54.51Length of rear dorsal small scales (Type 4)2.5–531Length of rear indented scales (Type 5)7–87.51Length of neck ventral scales3.5–542Length of middle trunk ventral scales4.54.51Length of rear trunk ventral scales4–751Length of keeled ventral scales (Type 6)9.5–10101Length of small ventral elongated scales (Type 7)3.5–43.51Length of small ventral round scales (Type 8)4.5–761Length of head and neck dorsolateral spines2–137.52Length of upper trunk dorsolateral spines8–1511.52Length of middle trunk dorsolateral spines8.5–22.515.55Length of rear trunk and furca base dorsolateral spines18–3325.55Length of neck ventral spines5.5–7.56.51Length of trunk ventral spines5.8–9.882Length of rear ventral spines5.7–15101Length of keels on Type 6 scales6–76.51表2（续见下页）。新种海岛多尾虫（*Polymerurus insularis* sp. nov.）的形态测量特征。未标注鳞片类型的所有鳞片长度均取自1型（Type 1）鳞片。缩写说明：N为测量的成虫标本总数量。 | 特征 | 范围（µm） | 平均值（µm） | 样本量（N） | | --- | --- | --- | --- | | 总体长 | 215–408 | 322 | 5 | | 体长（不含尾叉枝） | 139–308 | 222 | 5 | | 尾叉枝长 | 91.5–94.5 | 93 | 2 | | 尾叉枝+粘着小管长 | 109–117 | 113 | 2 | | 粘着小管长 | 16–23 | 19.5 | 2 | | 尾叉基部宽 | 26.5–27.5 | 27 | 1 | | 每侧尾叉枝节段数 | 19–21 | 20 | 1 | | 尾叉枝节段装饰刚毛长 | 4–8 | 6 | 3 | | 头部体宽 | 24–42 | 32 | 4 | | 躯干中部体宽 | 31–55 | 40 | 4 | | 尾叉基部体宽 | 23–25 | 24 | 4 | | 口环直径 | 8–13 | 10 | 3 | | 头叶数量 | 3 | 3 | 1 | | 头纤毛簇数量 | 4 | 4 | 3 | | 第一纤毛簇长 | 9–12 | 10.5 | 1 | | 第二纤毛簇长 | 11–19.5 | 14 | 1 | | 额区长 | 19–25 | 23 | 3 | | 额区宽 | 20–36 | 28 | 2 | | 侧突（背侧褶）长 | 10–18 | 14 | 3 | | 侧区长 | 12–15 | 14 | 3 | | 口下区长 | 13–17 | 15 | 2 | | 咽长 | 74 | 74 | 1 | | 咽前段宽 | 19 | 19 | 1 | | 咽中部宽 | 25 | 25 | 1 | | 咽肠连接部宽 | 27 | 27 | 1 | | 卵宽 | 30 | 30 | 1 | | 原肾管长 | 105 | 105 | 1 | | 运动纤毛长 | 5–8.5 | 7 | 1 | | 鳞片纵列总数 | 42 | 42 | 1 | | 单个纵列鳞片数 | 55 | 55 | 1 | | 鳞片横排总数 | 64 | 64 | 1 | | 单个横排鳞片数 | 10 | 10 | 1 | | 颈部背侧鳞片长 | 3.5–8.5 | 6 | 4 | | 躯干中部背鳞长 | 5.5–9 | 8.5 | 2 | | 躯干中部侧鳞长 | 6.5–11 | 8.5 | 2 | | 后部背侧鳞片长 | 7.5–9 | 6 | 2 | | 后部三角鳞（2型）长 | 5–7 | 6 | 3 | | 具后棘小型圆形鳞（3型）长 | 4.5 | 4.5 | 1 | | 后部背侧小鳞（4型）长 | 2.5–5 | 3 | 1 | | 后部凹缘鳞（5型）长 | 7–8 | 7.5 | 1 | | 颈部腹鳞长 | 3.5–5 | 4 | 2 | | 躯干中部腹鳞长 | 4.5 | 4.5 | 1 | | 躯干后部腹鳞长 | 4–7 | 5 | 1 | | 具脊腹鳞（6型）长 | 9.5–10 | 10 | 1 | | 小型细长腹鳞（7型）长 | 3.5–4 | 3.5 | 1 | | 小型圆形腹鳞（8型）长 | 4.5–7 | 6 | 1 | | 头颈部背侧棘长 | 2–13 | 7.5 | 2 | | 躯干上部背侧棘长 | 8–15 | 11.5 | 2 | | 躯干中部背侧棘长 | 8.5–22.5 | 15.5 | 5 | | 躯干后部及尾叉基部背侧棘长 | 18–33 | 25.5 | 5 | | 颈部腹棘长 | 5.5–7.5 | 6.5 | 1 | | 躯干腹棘长 | 5.8–9.8 | 8 | 2 | | 后部腹棘长 | 5.7–15 | 10 | 1 | | 6型鳞片的脊长 | 6–7 | 6.5 | 1 |