Folsomia biparis, Potapov, Mikhail & Gulgenova, Ayuna, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3682.2.6 |
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publication LSID |
lsid:zoobank.org:pub:E42A2F18-9226-4CA5-8C71-C1302F01D04A |
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DOI |
https://doi.org/10.5281/zenodo.6156944 |
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persistent identifier |
https://treatment.plazi.org/id/039387CD-FF90-FFAA-FF28-62AEFBB434F3 |
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treatment provided by |
Plazi |
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scientific name |
Folsomia biparis |
| status |
sp. nov. |
Folsomia biparis sp. nov.
Fig. 24 View FIGURES 24 – 30. F
Type material. Holotype: female. Russia (East Siberia), Buryat Republic, Valley of Uda River, near Khorinsk (ca 150 km N Ulan-Ude), dry pine wood with sparse vegetation covering, flotation of sand, 16.viii.2008 and 3.viii.2009, 3 paratypes from the same locality, leg. A. Gulgenova & M. Potapov. Holotype and 3 paratypes in MSPU.
Other material. Buryat Republic, Dzerginsky Nature Reserve, vicinities of station '81 km' (upper flow of Barguzin River), 1080 m alt., 55.34350°N, 111.50290°E, floodplain sandy meadow at river bank, 10.ix.2012. leg. A. Gulgenova & M. Potapov. Buryat Republic, Vitim Highland, Eravna Basin, steppe with Kobresia and Leontopodium , near Sosnovo-Ozyorskoye (ca 200 km NE Ulan-Ude), ca. 950 m alt., 21.viii.2009 and 27.ix.2009. Irkutsk Area, west shore of Baikal Lake, nearby Bol'shoye Goloustnoye, taiga forest, viii.1990, leg. M.Kalinin.
Description. Body size about 0.4 mm, shape, granulation, outer mouth part, and antennae as in F. uniparis sp. nov. Ocelli lacking. PAO narrowly elliptical, not constricted, 0.9–1.0 as long as width of Ant I and 1.5–1.8 as long as inner unguis length.
Sensillary formula as 4,3/2,2,2,3,5 (s), 1,0/1,0,0 (ms). Sensillar chaetotaxy, macrochaetae, and foil chaetae as in F. uniparis sp. nov. (as in Fig. 31 View FIGURES 31 – 32 ). Macrochaetae on Abd.V 1.6–1.7 times shorter than dens and 1.9–2.2 times longer than mucro ( Fig. 24 View FIGURES 24 – 30. F ). Axial chaetotaxy as 7–8,4–5/3,3,4. Thorax without ventral chaetae.
Unguis of normal shape, without lateral and inner teeth. Empodial appendage about half as long as unguis (0.5–0.6). Tibiotarsi without additional chaetae on Leg I and II (21 chaetae), and with few ones on Leg III (25–27). Tibiotarsal tenent chaetae pointed. VT and tenaculum as in F. uniparis sp. nov. Anterior furcal subcoxae with 3–5 chaetae, posterior one with 3. Anterior side of manubrium with 2+2 chaetae. Posterior side of manubrium with 4+4 laterobasal, 2 apical chaetae (ap), 2+2 chaetae in distal transversal row (M1, L1), and 2+ 2 in central part ( Fig. 24 View FIGURES 24 – 30. F ). One pair of lateral chaetae presnt or absent. Dens with 9 anterior chaetae arranged as 1,2,1,2,3 ( Fig. 24 View FIGURES 24 – 30. F ). Posterior side of dens crenulated at the middle and with 4 normal chaetae (2 at base and 2 at the middle) and usually one rudimentary subapical chaeta. Mucro bidentate. Ratio of manubrium:dens:mucro =3.8–4.2:3.1–3.5:1.
Discussion. The species belongs to ' heterocellata ' group and resembles F. uniparis sp. nov. The only difference between F. uniparis sp. nov. and F. biparis sp. nov. is chaetotaxy of furca: one ( uniparis ) vs. two ( biparis ) pairs of chaetae on anterior side of manubrium, a pair of chaetae at the middle of posterior side of dens absent ( uniparis ) vs. present ( biparis ), one ( uniparis ) vs. two ( biparis ) chaetae in the second position on anterior side of dens, 3+3 ( uniparis ) vs. 2+2 ( biparis ) chaetae in central area of posterior side of manubrium.
Distribution and ecology. The ecological preferences seems generally to be as in F. uniparis sp. nov., but the two species are usually not collected together. Occurs in sandy or dry sites ( Fig 1 View FIGURE 1 : loc. 1, 2, 8, 13).
Etymology. Springtails with two pairs of chaetae on anterior side of manubrium.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.