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14 SMITHSONIAN CONTRIBUTIONS TO PALEOBIOLOGY
TABLE 6.—Dimensions (mm) of the skull and long bones of the extinct Alopochen (Mascarenachen) kervazoi, from Reunion, modem
A. aegyptiacus (USNM), and extinct Alopochen sirabensis (MNHN), from Madagascar. (a= maximal width of frontal at level of
processus supraorbitalis of prefrontal bone; b= minimal width of frontal above orbits; c=cranium width at level of insertion of postorbital
processes; d=bill length, from frontonasal hinge to tip of premaxillae; e=bill depth, from dorsal surface at frontonasal hinge
to ventral surface at proximal end of maxillary; f= sternum-keel depth, from dorsal surface of sternum to ventral tip of keel; g= pelvis
length, from first synsacral vertebra to last synsacral vertebra; h=length of anterior scapula, from base of glenoid facet to top of acromion;
«=number of specimens.)
Measurement
Skull
frontal width (a)
frontal width (b)
cranium width (c)
bill length (d)
bill depth (e)
ratio e x 100 : d
Sternum
keel depth (f)
Pelvis
length (g)
Coracoid
maximum length
internal length
proximal width
proximal depth
stemal-facet length
stemal-facet depth
midshaft width
midshaft depth
Scapula
anterior length (h)
Humerus
total length
proximal width
proximal depth
distal width
distal depth
midshaft width
midshaft depth
Ulna
total length
proximal width
proximal depth
distal width
depth external condyle
midshaft width
midshaft depth
Carpometacarpus
total length
proximal width
proximal depth
distal width
distal depth
width metacarpale majus
depth metacarpale majus
Phalanx 1, major wing digit
total length
Phalanx 2, major wing digit
total length
Femur
A. (M.) kervazoi
mean (n) range
25.3(1)
13.0(1)
30.7(1)
45.1(1)
18.6(1)
41.2(1)
37.20 (2)
100.6(1)
-63(1)
56.90 (3)
13.8(1)
12.03 (3)
23.5(1)
5.4(1)
6.87 (3)
4.97 (3)
14.70 (3)
126.0(1)
25.7(1)
14.2(1)
19.2(1)
10.9(1)
9.65 (2)
8.25 (2)
-119(1)
13.1(1)
11.9(1)
12.3(1)
10.8(1)
6.65 (2)
6.50 (2)
72.35 (4)
7.70 (4)
19.80(4)
9.05 (4)
6.23 (4)
6.07 (7)
4.78 (6)
31.60(2)
24.1(1)
-
-
-
-
-
-
36.7-37.7
-
-
53.7-60.0
-
11.1-13.0
-
-
6.2-7.4
4.6-5.2
14.2-15.5
-
-
-
-
-
9.0-10.3
8.0-8.5
-
-
-
-
-
6.3-7.0
6.0-7.0
70.7-75.7
7.4-8.2
18.3-22.4
8.6-9.5
5.8-6.5
5.3-6.5
4.2-5.3
30.9-32.3
-
A. ae
mean (n)
24.17(7)
12.58(8)
30.46 (8)
50.91 (8)
19.16(8)
37.66 (8)
37.17(9)
104.71 (9)
67.71 (9)
60.56(11)
14.17(9)
13.71 (9)
25.30 (9)
6.10(9)
7.52(10)
5.33 (9)
17.11(9)
134.10(11)
28.79(10)
14.86(10)
20.63 (10)
11.63(10)
9.62(10)
8.89 (9)
128.92(11)
13.80(10)
12.53(10)
12.01 (10)
11.47(9)
7.13(10)
6.84 (9)
79.06(10)
8.21 (10)
22.61(11)
9.76 (9)
6.92 (9)
6.06 (9)
5.09(8)
-
26.06 (7)
gyptiacus
range
21.8-26.3
11.1-14.2
29.4-32.3
47.6-54.1
17.5-21.0
34.3-39.9
34.1^*0.2
99.0-112.0
62.0-75.1
55.0-65.6
12.4-16.0
12.2-15.1
23.7-27.9
5.0-7.3
6.5-8.8
4.6-6.2
15.7-19.0
122.8-148.4
25.7-32.7
13.2-16.4
18.3-22.5
10.5-12.5
8.6-11.0
8.1-10.0
118.1-144.1
11.8-15.4
11.5-13.7
10.6-13.5
10.2-12.7
6.4-7.9
5.9-7.5
72.0-86.0
7.2-9.0
19.3-27.4
8.8-10.6
6.3-7.5
5.5-6.7
4.5-6.0
-
24.1-28.1
A. sirabensis
mean (ri)
-
-
-
-
-
-
-
-
-
63.11 (16)
-
-
-
-
7.34(16)
-
-
140.26(30)
-
-
-
-
10.07 (30)
-
128.56(10)
-
-
-
-
6.96(10)
-
80.69(21)
-
_
_
_
6.52(21)
_
_
-
range
-
-
-
-
-
-
-
-
-
56.7-68.3
-
-
-
-
6.6-7.9
-
-
127.3-152.4
-
-
-
-
8.8-11.8
_
119.5-139.1
_
_
_
_
6.3-7.5
_
73.2-90.0
_
_
_
_
5.9-7.1
-