Folsomia wanxianesis, Ji, Ming, Ding, Yufeng & Chen, Jian-Xiu, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.177573 |
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DOI |
https://doi.org/10.5281/zenodo.5619473 |
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persistent identifier |
https://treatment.plazi.org/id/A05387E7-F331-450C-FF46-B0B7FB41F644 |
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treatment provided by |
Plazi |
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scientific name |
Folsomia wanxianesis |
| status |
sp. nov. |
Folsomia wanxianesis , sp. nov.
Figs 1–17 View FIGURES 1 – 5 View FIGURES 6 – 12 View FIGURES 13 – 17 , Tab.1 View TABLE 1
Type material. Holotype: female, China: Chongqing: Wanxian, Lihua Village, 252m alt., under stones in the village, 6.ix.1998, collection number C8639, coll. Meng Wen-xin et al. Paratypes: 3 females and 1 male, the same data as holotype. Deposited in the Department of Biology, Nanjing University.
Description. Body length. Up to 0.62mm. Color. Background color white. Head and body with very scattered blue pigment along sides, pigment on Abd. IV–VI relatively dense.
Head. Ommatidia absent. Postantennal organ (PAO) narrow, 0.68–0.74 times as width of Ant. I base, without inner denticles, with 6 guard setae ( Fig. 1 View FIGURES 1 – 5 ). Labral setal formula as 4 / 5, 5, 4 ( Fig. 2 View FIGURES 1 – 5 ). Labium with 4+4 basomedian setae, 3+3 proximal setae, 5+5 basolateral and 4+4 postlabial setae ( Fig. 3 View FIGURES 1 – 5 ). Ant. I with 2 dorsal basal microsensilla (ms) and 2 ventral sensilla (s), one s larger and more translucent. Ant. II with 1 dorsal, 1 ventral and 1 lateral basal ms and 1 apical lateral translucent s. Ant. III with 1 basal ms and 1 lateral s; antennal organ ( AO) consisting of 2 inner s, 2 outer s, inner ones finger-like ( Figs 4 View FIGURES 1 – 5 a, b). Except common setae, Ant. IV with 39–46 s of different sizes, all translucent, 6 of them apparently thicker than others ( Figs 5 View FIGURES 1 – 5 ). Sensilla thinnerwalled and translucent usually slender than common setae.
Body chaetotaxy. Macroseta (Mac) larger than common seta. Sensillum (s) slightly shorter, more translucent and slender than common seta (c). Microsensillum (ms) thick-walled and smaller than s. Mac formula as 1, 1 / 3, 3, 3, 4; largest ones on last 3 abdominal segments 3.4-4.0 times as length of mucro. Sensillar formulae as 4, 3 / 2, 2, 2, 3 (s) and 1, 0 / 0, 0, 0 (ms) ( Fig. 6 View FIGURES 6 – 12 ). Sensilla probably present on Abd.V, but hardly distinguishable. Medial s on Th. II–Abd. III well in front of posterior row of dorsal setae (p-row); those on Abd. I–III situated between Mac 1 and Mac 2, and much closer to Mac 2. Corner sensillum (cors) located in p-row on Th. II–III ( Fig. 7 View FIGURES 6 – 12 ). Lateral sensillum located in p-row on Abd. I and in front of p-row on Abd. II–III ( Figs. 8 & 9 View FIGURES 6 – 12 ). The leaf-shaped sensilla on Abd. IV–VI are absent. Common setae along median line on each side (Axial setae–ax) of Th. II–Abd. III as 9, 7(6) / 4, 4, 4. Thorax without ventral setae.
Appendages. Unguis and unguiculus toothless. Tibiotarsal setae arranged in 3 rings, each with 7 setae on leg I–II ( Figs 10, 11 View FIGURES 6 – 12 ); and 25–28 setae on leg III probably in 4 rings ( Fig. 12 View FIGURES 6 – 12 ). Ventral tube with 4+4 laterodistal ( Fig. 13 View FIGURES 13 – 17 ) and 6 posterior setae. Retinaculum with 4 teeth on each ramus and 1 seta on corpus ( Fig. 14 View FIGURES 13 – 17 ). Anterior and posterior parts of furcal subcoxa respectively with 5–6 and 3 setae ( Fig. 15 View FIGURES 13 – 17 ). Manubrium anteriorly with 3+3 setae in 2 longitudinal rows ( Fig. 16 View FIGURES 13 – 17 ); posteriorly with 4+4 latero-basal, 3+3 central, 2+2 distal, and 1+1 apical ( Fig. 17 View FIGURES 13 – 17 ); laterally with 1+1 setae ( Fig. 16 View FIGURES 13 – 17 ). Dens anteriorly with 10–11, posteriorly with 2 basal and 2 medial setae ( Figs 16, 17 View FIGURES 13 – 17 ). Mucro with 2 teeth, subapical one larger than apical ( Figs 16, 17 View FIGURES 13 – 17 ). Length ratio of manubrium: dens: mucro as 5.4-6.9:6.3-7.1:1.
Etymology. The new species is named after Wanxian, the type locality.
Discussion. The new species, Folsomia wanxianensis , belongs to the quadrioculata -group and shares some characters with the Eastern Carpathian species F. albens Kaprus’ & Potapov 1999 in group, such as the absence of ommatidia, sensilla and microsensilla formulae of Th. II–Abd. III respectively as 4, 3 / 2, 2, 2, 3 (s) and 1, 0 / 0, 0, 0 (ms), 6 setae present on posterior side of ventral tube, and small body size. However, it could be easily distinguished from the latter by the laterodistal setae on ventral tube and setae on furca. The differences of the new species from other members of the quadrioculata- group are shown in table 1.
TABLE 1. Comparison of Folsomia wanxianensis sp. nov. with other members in quadrioculata- group. Lb = latero-basa, C = central, D = distal, A = apical
| Species | Body length (mm) | Ommatidia | Ventral tube setae | Mac formula ms formula |
|---|---|---|---|---|
| laterodistal posterior | Th.II–Abd.III | |||
| wanxianensis sp. nov. | 0.62 | 0+0 | 4+4 6 | 1,1/3,3,3 1,0/0,0,0 |
| agrelli Gisin,1944 sensu Potapov, 2000 | 1.2 | 1+1 | ?? | 1,2/3,3,3 1,0/1,0,0 |
| albens Kaprus’ & Potapov, 1999 | 0.8 | 0+0 | 3+3 6 | 1,1/3,3,3 1,0/0,0,0 |
| amplissima Potapov & Babenko, 2000 | 1.8 | 2+2 | 4+4 7–10 | 1,1/3,3,3 1,1/1,0,0 |
| atropolarois Potapov & Babenko, 2000 | 1.0–1.4 | 1+1 | 3+3 6–8 | 1,1/3,3,3? |
| baicalica Stebaeva & Potapov, 1997 | 1.3 | 0+0 | 3+3 7 | 1,1/3,3,3 1,0/1,0,0 |
| binoculata (Wahlgren, 1899) sensu Potapov & Babenko, 2000 | 1.7 | 1+1 | 4+4 7–9(6– 11) | 1,1/3,3,3 1,0/1,0,0 |
| borealis Potapov & Babenko, 2000 | 1.4 | 1+1 | 4+4 6–9 | 1,1/3,3,3 1,1/1,1,1 |
| continentails Potapov & Dunger, 2000 | 1.0 | 1+1 | 4+4 6–8 | 1,1/3,3,3 1,0/1,0,0 |
| manolachei Bagnall, 1939 sensu Potapov, 2000 | 0.60–0.95 | 2+2 | 3+3? | 1,1/3,3,3 1,0/1,0,0 |
| nanjingensis Ding et al., 2006 | 1.5 | 1+1 | 3+3 5–6 | 1,1/3,3,3 1,0/1,0,0 |
| ozeana Yosii, 1954 sensu Potapov, 2000 | 1.2 | 1+1 | 3+3 4–6 | 1,1/3,3,3 1,0/1,0,0 |
| palaearctica Potapov & Babenko, 2000 | 0.7 | 1+1 | 3+3 6–7 | ? 1,0/1,0,0 |
| quadrioculata (Tullberg, 1871) senus Dehaveng, 1982 | 0.95–1.30 | 2+2 | 3+3 6 | ? 1,0/1,0,0 |
| regularis Hammer, 1953 sensu Potapov & Babenko, 2000 | 1.6 | 1+1 | 4+4? | 1,2/3,3,3 1,0/1,0,0 |
| riozoyoshiii Potapov & Cassagnau, 2000 | 0.9–1.3 | 1+1 | 3+3 6–7 | 1,1/3,3,3 1,0/1,0,0 |
| rossica Potapov & Dunger, 2000 | 0.7–1.3 | 1+1 | 3+3? | ?: 1,1/1,0,0 |
| taimyrica Martynova, 1973 sensu Potapov & Babenko 2000 | ? | 0+0 | 4+4 6–12 | 1,2/3,3,3 1,1/1,1,1 |
| villosa Potapov & Marusik, 2000 | 1.1 | 0+0 | 4+4 8–9 | 1,1/3,3,3 1,0/1,0,0 |
| vtorovi Martynova, 1971 sensu Potapov, 2000 | 1.3 | 0+0 | 4+4 6 | ? 1,0/1,0,0 |
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