| Checklist of the Collembola: Key to the species of Sphyrotheca |
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This key is still under construction. Note that missing figures will be provided as soon as possible. Currently, the key is in the feasibility study phase to find out how to integrate in the checklist in a modular way a key that has been generated with DELTA.
Gerhard Bretfeld,
Zoological Institute, University of Kiel, 24098 Kiel, Germany
Frans Janssens,
Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium
1(0). Anterior side of dens with 1 or more apical setae........... 2
Anterior side of dens without apical setae: formula 0, , 1....
.......................................... coeruleocapitata
2(1). Anterior side of dens with 1 apical seta: formula 1, , 1......
................................................. caputalba
Anterior side of dens with more than 1 apical seta.......... 3
3(2). Anterior side of dens with 1 crossrow of apical setae....... 4
Anterior side of dens with more than 1 crossrow of apical
setae.................................................... 12
4(3). Dorsal part of head with 1 median seta apm; frons rows b with
3 + 3 setae......................................... ozeiana
Dorsal part of head with 2 or 3 median setae: m1, m2, apm;
frons rows b with 2 + 2 setae............................. 5
5(4). Dorsal part of head with 2 median setae: m2, apm..... sinensis
Dorsal part of head with 3 median setae: m1, m2, apm........ 6
6(5). Empodium iii with outer tooth............................... 7
Empodium iii without tooth.................................. 9
7(6). Dorsal part of head with spines of different length and width.
............................................. minnesotensis 3
Dorsal part of head with spines of equal length and width... 8
8(7). Filaments of all empodia thickened and exceeding claws... nani
Filaments of empodium iii short and thin, not exceeding claw..
................................................. gangetica
9(6). Dorsal parts of head with all modified setae as short cones...
................................................. dawydoffi
Dorsal parts of head with setae some long, some short...... 10
10(9). Setae a1, b1, 2 + 2, between antennae of normal setal shape or
slightly thickened....................................... 11
Setae a1, b1, 2 + 2, between antennae short and thin..........
.......................................... madagascariensis
11(10). Head apex with 3 + 3 short setae, all slender.................
............................................. multifasciata 3
Head apex with 3 + 3 short setae, some expanded, some slender.
.............................................. nanjingensis
12(3). Anterior side of dens with 2 crossrows of apical setae: 1
apical and 1 subapical crossrow.......................... 13
Anterior side of dens with 3 crossrows of apical setae:
formula 3/4?, 2, 2, , 1.............................. boneti 1
13(12). Subapical crossrow of anterior side of dens with 1 seta:
formula 3/4?, 1, , 1..................................... 14
Subapical crossrow of anterior side of dens with 2 seta:
formula 3/4?, 2, , 1..................................... 15
14(13). Dorsal part of head with 2 median setae: m2, apm..............
................................................. santiagoi 4
Dorsal part of head with 3 median setae: m1, m2, apm..........
................................................. formosana
15(13). Dorsal part of head with 2 median setae: m2, apm........... 16
Dorsal part of head with 3 median setae: m1, m2, apm....... 21
16(15). Filament of empodium iii thickened and exceeding claws; head
frons with setae b2 much shorter than the other spines,
about 1/4 or 1/3................................. bellingeri
Filament of empodium iii thin; head frons with setae b2 equal
to or shorter than the other spines...................... 17
17(16). Spines of large abdomen rough.............................. 18
Spines of large abdomen smooth.......................... aleta
18(17). Claws with lateral pseudonychia............................ 19
Claws without lateral pseudonychia............... mucroserrata
19(18). Spines of head rough; trochanter iii with 5 normal setae... 20
Spines of head smooth; trochanter iii with 4 normal setae.....
.............................................. vanderdrifti
20(19). Frons of head with setal pair a1..................... karlarum
Frons of head without setal pair a1.................... peteri
21(15). Tip of mucro with incision or a long spine................. 22
Tip of mucro without incision or a long spine.............. 25
22(21). Empodium iii with outer tooth; filament iii shorter than
empodium iii............................................. 23
Empodium iii without outer tooth; filament iii and empodium
iii of same length................................. coerulea
23(22). Mucro with asymmetrical incision: tip with 1 long outer spin..
........................................................ 24
Mucro with symmetrical incision........................ boneti 2
24(23). Outer posterior edge of mucro smooth; posterior side of dens
with about 17 setae.......................... spinimucronata
Outer posterior edge of mucro undulated; posterior side of
dens with about 13 setae........................... nepalica
25(21). Filament iii short and not exceeding claw; filaments of all
empodia thin...................................... implicata
Filament iii strong and exceeding claw; filaments of empodia i
and ii thickened................................... machadoi
Endnotes
1 Specimen A.
2 Specimen B.
3 Sensu Bretfeld, 2000.
4 Sensu Lawrence, 1968.
5 Sminthurus maculatus Schött, 1883 not included as it is not completely described.
6 Sminthurus pseudofuscus Schött, 1901 not included as it is not completely described.
7 Sphyrotheca multifasciata Börner, 1909 (formae s.s., ornata and pallidinota) not included as they are not completely described.
8 Sphyrotheca multifasciata sensu Ionesco, 1915 not included as Stach, 1956:206 doubts in this generic description.
9 Sphyrotheca multifasciata sensu Womersley, 1932 not included as these specimens have never been restudied. Gisin, 1944:117 mentioned this occurence without commentary. In Gisin 1960 it is not mentioned, contrary to the note by Greenslade 1994:135.
10 Sphyrotheca multifasciata sensu Uchida, 1957 not included as it is not completely described.