| Checklist of the Collembola: Key to the species of Deuterosminthurus |
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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.
1(0). Needle of unguiculus not apically knobbed................... 2
Needle of unguiculus knobbed................................ 8
2(1). Dens with one subapical ventral seta; setae on head and body
thick, spine-like.................................. tristani
Dens with several subapical ventral setae (3-6); setae on head
and body thin and short................................... 3
3(2). Unguiculus as long as ventral edge of unguis..... nonfasciatus
Unguiculus short, 1/3-1/2 as long as ventral edge of unguis. 4
4(3). Dens with 3 ventral setae................................... 5
Dens with 5-6 ventral setae................................. 6
5(4). Dens with 3 very short ventral setae; fourth antennal segment
with 5-7 intermediate subsegments.................. russatus
Dens with 3 long ventral setae; fourth antennal segment with 3
intermediate, poorly defined sub-segments; head and body
with thick spine-like setae........................ maassius
6(4). Dens with 5 ventral setae and 6 intermediate subsegments......
................................................ salinensis
Dens with 6 ventral setae................................... 7
7(6). Fourth antennal segment with 6 subsegments; tip of female
appendage without any teeth; tibiotarsus with spines........
................................................. richardsi
Fourth antennal segment with 6-9 subsegments; female appendage
spatulate with 7 teeth; without spines on third tibiotarsus.
.................................................... lurida
8(1). Fourth antennal segment with 4-5 intermediate subsegments... 9
Fourth antennal segment with 7-15 intermediate subsegments. 10
9(8). Dens with 5 ventral setae; female appendage with 2 (1-4)
teeth............................................ delatorrei
Dens with 6 ventral setae; female appendage without any teeth.
.................................................. lippsoni
10(8). Setae ciliated on body; very small species (0.75 mm)..........
............................................... xeromorphus
Setae smooth on head and body; larger species (1.0-1.3 mm). 11
11(10). Dens with 6 ventral setae; unguiculus with a very long tooth;
female appendage spatulate with 5 teeth........ validentatus
Dens with 5 ventral setae; unguis with small tooth; tip of
female appendage without teeth................. wexfordensis
delatorrei
Needle of unguiculus knobbed. Fourth antennal segment
with 4–5 intermediate subsegments. Dens with 5 ventral setae; female
appendage with 2 (1–4) teeth.
lippsoni
Needle of unguiculus knobbed. Fourth antennal segment
with 4–5 intermediate subsegments. Dens with 6 ventral setae; female
appendage without any teeth.
lurida
Needle of unguiculus not apically knobbed. Dens with
several subapical ventral setae (3–6); setae on head and body thin and
short. Unguiculus short, 1/3–1/2 as long as ventral edge of unguis. Dens
with 5–6 ventral setae. Dens with 6 ventral setae. Fourth antennal
segment with 6–9 subsegments; female appendage spatulate with 7 teeth;
without spines on third tibiotarsus.
maassius
Needle of unguiculus not apically knobbed. Dens with
several subapical ventral setae (3–6); setae on head and body thin and
short. Unguiculus short, 1/3–1/2 as long as ventral edge of unguis. Dens
with 3 ventral setae. Dens with 3 long ventral setae; fourth antennal segment
with 3 intermediate, poorly defined sub-segments; head and body with thick
spine-like setae.
nonfasciatus
Needle of unguiculus not apically knobbed. Dens
with several subapical ventral setae (3–6); setae on head and body thin
and short. Unguiculus as long as ventral edge of unguis. Fourth antennal
segment with 14–15 intermediate subsegments.
richardsi
Needle of unguiculus not apically knobbed. Dens with
several subapical ventral setae (3–6); setae on head and body thin and
short. Unguiculus short, 1/3–1/2 as long as ventral edge of unguis. Dens
with 5–6 ventral setae. Dens with 6 ventral setae. Fourth antennal
segment with 6 subsegments; tip of female appendage without any teeth;
tibiotarsus with spines.
russatus
Needle of unguiculus not apically knobbed. Dens with
several subapical ventral setae (3–6); setae on head and body thin and
short. Unguiculus short, 1/3–1/2 as long as ventral edge of unguis. Dens
with 3 ventral setae. Dens with 3 very short ventral setae; fourth antennal
segment with 5–7 intermediate subsegments.
salinensis
Needle of unguiculus not apically knobbed. Dens with
several subapical ventral setae (3–6); setae on head and body thin and
short. Unguiculus short, 1/3–1/2 as long as ventral edge of unguis. Dens
with 5–6 ventral setae. Dens with 5 ventral setae and 6 intermediate
subsegments.
tristani
Needle of unguiculus not apically knobbed. Dens with
one subapical ventral seta; setae on head and body thick, spine-like.
validentatus
Needle of unguiculus knobbed. Fourth antennal
segment with 7–15 intermediate subsegments. Setae smooth on head and
body; larger species (1.0–1.3 mm). Dens with 6 ventral setae; unguiculus
with a very long tooth; female appendage spatulate with 5 teeth.
wexfordensis
Needle of unguiculus knobbed. Fourth antennal
segment with 7–15 intermediate subsegments. Setae smooth on head and
body; larger species (1.0–1.3 mm). Dens with 5 ventral setae; unguis with
small tooth; tip of female appendage without teeth.
xeromorphus
Needle of unguiculus knobbed. Fourth antennal
segment with 7–15 intermediate subsegments. Setae ciliated on body; very
small species (0.75 mm).