Two new species of the genus Friesea (Collembola: Neanuridae) from Northwest China
Author
Gao, Yan
Author
Yin, Wenying
text
Zootaxa
2006
1283
63
68
journal article
10.5281/zenodo.173459
83a1a848-6da3-41bb-aab0-1ec478f77fd3
11755326
173459
Friesea quadrispinensis
sp. nov.
(
Figs. 10–21
)
Material examined.
Holotype
1 male
, northwest
China
, Shaanxi Province, Guangtou Mountain,
2800 km
, litterrich soil in forest of
Larix chinensis
,
20 /7 /2003
, Huan Yin.
Description.
Colour: pale. Length: 560 µm. Cuticle with fine granulation.
Head (
Figs 10–13
): 5+5 ocelli with 3 setae among them (
Fig. 10
). Eye patches with scattered black pigment. Cephalic diagonal length 148 µm. Antenna shorter than cephalic diagonal, ratio of antenna to head as 0.4; length ratio of Ant. I: II: III+IV as 1: 0.7: 1.3. Ant. I with 7, ant. II with 12 ordinary setae. Ant. III organ normal, apical with 2 sensory rods and 2 long sensillae (
Fig. 11
). Ant. IV dorsal with 6 blunt sensillae and ventral with about 15 microsetae; apical bulb simple. Ant. III–IV stocky. Maxilla typical for the genus (
Fig. 12
). Labral setae 2/3, 3, 4. Labium as in
Fig. 13
, labial triangle with 5 setae on each side.
Body: Setae all simple, subequal in length, of moderate size even on abd. V–VI; ssetae 1.3 to 2.2 times as long as ordinary mesochaetae. Abd. VI with 4 simple anal spines which are subequal in length, as long as unguis (
Fig. 15
).
Dorsal chaetotaxy: as illustrated in
Fig. 14–15
. Area frontalis of head with median setae “d”. Th. I with 4+4 setae. Seta a2 present on Th. II and absent on Th. III; Th. II and III with 2 sensillae p3 and p6 on each side. Abd. I–IV with a2 and a sensillum p4. Abd. V without a2, with a long sensillum p2 (
Fig. 15
). Dorsal axial setae pairs as 1, 2, 2/2, 2, 2, 2, 2, 2. Tergite chaetotaxy as follows:
| Di |
De |
Dl |
L |
| Th. I |
1 |
2 |
_ |
1 |
| Th. II |
4 |
3+s |
2+s |
2 |
| Th. II |
3 |
3+s |
2+s |
2 |
| Abd. I |
3 |
3+s |
2 |
1 |
| Abd. II |
3 |
3+s |
2 |
1 |
| Abd. III |
3 |
3+s |
2 |
1 |
FIGURES 10–21.
Friesea quadrispinensis
sp. nov.
10. Ocelli. 11. Ant. III–IV, dorsal. 12. Maxilla. 13. Labium. 14. Th.II–III. 15. Abd.III–VI. 16. Ventral tube, left side. 17. Furca. 18. Tenaculum. 19. Male genital aperture. 20. Anal lobes. 21. Hind foot complex.
Ventral chaetotaxy: Head with 2+2 setae along ventral line. Ventral tube with 4 setae on each half (
Fig. 16
). Furca without mucro, dens with 3 setae, manubrium with a row of 2+2 setae (
Fig. 17
). Tenaculum with 2+2 teeth (
Fig. 18
). Genital apertures for male as in
Fig. 19
. Anal lobes with 3 hr setae on each half (
Fig. 20
).
Tibiotarsi I, II and III with 16, 16 and 15 setae respectively, with 1 acuminate tenent hair, which is longer than other setae of each tibiotarsi (
Fig. 21
). Unguis 14µm long, without inner teeth; unguiculus absent (
Fig. 21
).
Remarks.
This species resembles
Friesea grandis
Mills
, HB,
1934 in
4 anal spines. However, it differs from it by mucrofree furca and tenaculum and 5+5 ocelli furca and tenaculum (
F. grandis
without furca and tenaculum and with 8+8 ocelli, after
Massoud, 1967
). It resembles
Friesea alaskella
Fjellberg,
1985
in general dorsal chaetotaxy and in mucrofree furca and tenaculum. However, it differs from it by 4 anal spines and 5+5 ocelli (
F. alaskella
with 6 anal spines and 2+2 ocelli,
Christiansen & Bellinger, 1998
).
Etymology.
The name of the new species is after its 4 anal spines, which is unique in the genus.