Geology Reference
In-Depth Information
Amauris
(Nymphalidae). This African genus
numbers 15 species (Ackery
&
Vane-Wright,
1984) generally found in forests. In addiion to
ellioti,
nine more species occur in the study area.
Ackery
&
Vane-Wright (1984) studied the phylo-
geny of the genus. For our purpose the results are
not very helpful, ellioti being the sister species of a
group of 12 species.
highest concentraion of endemics in a single area
is found in the Usambara Mountains where no
endemic montane grassland species occur.
The endemics resricted to a single area
account for 106 (i.e. 41 % ) of the 259 taxa listed in
Appendix 8.2. Thus, 59% of the taxa are found in
two or more areas. This percentage is slightly
higher than for grassland butterflies, and since the
total number of taxa is 4.5 imes as high there are
many more orest than grassland taxa indicaing
coherence between areas.
Table 8.5 gives eight areas formed by combina-
tions according to the steps menioned under
Methods (p. 134). Two combinaions, namely, the
Easten Arc mountains and what we have called
the Westen Border Range (from the Marungu
Plateau to the west side of Lake Mobuto - for-
Distinaion and coherence of areas of endemism
The list of potenial areas of endemism and their
endemicity is given in Table 8.4. There are srik-
ing differences with the montane grassland but-
terflies (Table 8.1): there are fewer potenial areas
without endemics, the endemics are not evenly
distributed over the areas with endemics, and the
Table 8.4. Distribution of buttelies (sp eies and subspecies) restriaed to montane orests over potential areas
of enemism or exp lanation, see Ta ble
8. 1)
N
%
N(end)
%(enN)
%(end7)
1 Ethiopia
13
5.04
13
100.00
5.04
2 Mt Kenya
29
11.24
2
6.90
0.78
3 Aberdare Mts
22
8.53
0
0
0
4 Kikuyu Highlands
33
12.79
3
9.09
1.16
5 W Kenya
38
14.73
0
0
0
6 Mt Elgon
38
14.73
3
7.89
1.16
7 Kilimanjaro
23
8.91
4
17.39
1.55
8 Mt Meru
14
5.43
0
0
0
9 Great Craters
22
8.53
2
9.09
0.78
10 Usambara
37
14.34
15
40.54
5.81
11 Nguu
4
1.55
0
0
0
12 Nguru
27
10.47
8
29.63
3.10
27.03
13 Uluguru
37
14.34
10
3.88
3.88
0
0
0
14 Ukaguru
10
15 Rubeho
1
5.56
0.39
18
6.98
45
17.44
8
17.78
3.10
16 Uzungwa
17 Southen Highlands
30
11.63
0
0
0
18 Nyika
28
10.85
9
32.14
3.49
19 Zomba
14
5.43
1
7.14
0.39
20 Mlanje
20
7.75
4
20.00
1.55
21 Ufipa
14
5.43
1
7.14
0.39
22 Mpanda
20
7.75
1
5.00
0.39
23 Kigoma
22
8.53
2
9.09
0.78
24 Marungu
5
1.94
0
0
0
25 North L. Tanganyika
34
13.18
2
5.88
0.78
26 Kivu area
60
23.26
12
20.00
4.65
27 Rwenzori
46
17.83
5
10.87
1.94
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