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NUMBER 89 187
TABLE 1.—Measurements (mm) of pectoral and wing elements of Amplibuteo woodwardi (sample size (n), mean
(x), and standard deviation (s.d.)) from Rancho La Brea, California, compared with A. concordatus, new species.
Measurements of the carpometacarpus for A. woodwardi are in Emslie (1995). (L=length, PW=proximal width,
PD=proximal depth; LWS=least width of shaft, LDS=least depth of shaft, DW=distal width, DD=distal depth.)
Element
Coracoid
Amplibuteo woodwardi
n
jc + s.d.
range
Amplibuteo concordatus
UF 159404
UF 165529
AMNH 10399
Humerus
Amplibuteo woodwardi
n
x±s.d.
range
Amplibuteo concordatus
UF159406(right)
UF 159407(left)
UF 165542
Ulna
Amplibuteo woodwardi
n
Jc±s.d.
range
Amplibuteo concordatus
UF 121743
Radius
Amplibuteo woodwardi
LACM H7419
LACM H7414
LACM D2057
LACM D4872
Amplibuteo concordatus
UF 159408
AMNH 10398
Carpometacarpus
Amplibuteo concordatus
UF 159426
AMNH 10395
L
5
76.4±2.3
74.5-80.7
-
-
72.5
1
207.0
-
163.3
162.7
-
-
-
-
177.4
-
-
-
-
-
-
93.2
96.4
PW
- --
-
-
-
6
40.0 ±2.4
37.4-42.7
33.3
34.2
32.6
5
24.3±0.6
23.9-25.0
17.9
11.6
11.1
-
-
-
-
9.5
9.5
HORIZON AND AGE.—Late Pliocene (late Blancan), 2.2-2.0
Ma (Morgan and Hulbert, 1995; Hulbert, 1997; Emslie, 1998).
MEASUREMENTS OF HOLOTYPE.—See Table 1.
PARATYPES.—Haile 7C: Humeral end of left coracoid, UF
159404; left furcula, UF 159403; carina of sternum, UF
159402; right and left humeri (matching) with shafts broken,
UF 159406, 159407 (Figure 3B); right and left ulnae (matching),
UF 121743, UF 159405; distal end of left radius, UF
159408; partial synsacrum, UF 159427.
Inglis 1C (section 10, T. 17S, R. 16E, Citrus County, Florida
(FLMNH Vertebrate Paleontology Locality number CIO 19;
Figure 2)): Associated right coracoid and fragmentary manubrium
of sternum, UF 165529; left humerus missing distal end,
UF 165542 (Figure 3A); left fibula, UF 165577. Locality dates
to late Pliocene (early Irvingtonian, 2.0-1.6 Ma) based on vertebrate
biochronology similar to that of Inglis IA.
PD
5
21.1±1.2
20.2-23.2
18.4
16.4
17.9
6
12.3 ±0.5
11.5-12.8
9.0
9.0
8.8
5
19.0±0.7
18.2-19.5
14.6
8.5
8.2
-
-
-
-
21.1
21.9
LWS
5
12.3 ±0.7
11.4-13.3
-
9.0
10.6
3
14.5±0.7
13.7-15.0
13.1
12.3
12.1
5
10.3±1.5
8.9-12.3
9.0
- -
6.0
6.2
5.4
-
7.9
8.0
LDS
5
7.8±0.4
7.3-8.4
-
-
6.4
3
12.6±0.3
12.3-12.8
10.4
10.8
9.5
5
10.7±0.5
10.0-11.1
8.4
-
-
4.9
5.3
4.0
-
5.2
5.2
DW
4
34.9±1.1
33.5-36.1
- -
-
4
35.8± 1.8
34.1-37.5
26.7
26.7
-
4
16.3±1.4
13.9-17.4
14.7
-
-
14.3
15.9
13.5
13.3
11.8
12.5
DD
4
9.6±0.7
8.8-10.3
- -
8.2
4
17.9 ±0.7
17.3-18.8
14.2
14.2
-
4
17.3 ±0.9
15.9-17.9
12.7
-
-
6.7
7.6
5.8
6.1
13.1
13.9
Duncan 4-19 (south locality, west of Railroad Wash, Greenlee
County, Arizona (Figure 2)): Right coracoid, AMNH
10399; distal end of left radius, AMNH 10398; left carpometacarpus,
AMNH 10395. Locality dates to late Pliocene,
3.7-3.2 Ma (Blancan III of Repenning, 1987).
MEASUREMENTS OF PARATYPES.—See Table 1.
ETYMOLOGY.—From Latin, concordatus, agree together or
harmonize, in reference to the close similarity of the fossil material
both from the two Florida localities and from Arizona.
DIAGNOSIS.—Differs from Amplibuteo woodwardi (L. Miller)
and A. hibbardi in the following characteristics. Carpometacarpus
(UF 159426, AMNH 10395; Figure 1) with
metacarpal I relatively large, with little or no proximal curvature;
deep, narrow fossa present on internal surface of metacarpal
I below pisiform process; internal ligamental fossa moderately
to deeply excavated; and area between pisiform and