Abstract

The size (mass) of Archaeopteryx, primarily the Berlin specimen, has been estimated in two ways. A new three-dimensional reconstruction suggests a mass of no more than 271 g. Application of allometric equations derived from both birds and mammals to various linear dimensions yields a range of estimates from 112 to 2269 g, but all the more plausible estimates lie in the range 220–330 g.

REFERENCES

ALEXANDER
,
R. McN.
1983
Allometry of the leg bones of moas (Dinornithes) and other birds. Journal of Zoology, London
 ,
200
:
215
231
.
ALEXANDER
,
R. McN.
JAYES
,
A. S.
MALOIY
,
G. M. O.
WATHUTA
,
E. M.
1979
Allometry of the limb bones of mammals from shrews (Sorex) to elephant (Loxodonta). Journal of Zoology, London
 ,
189
:
305
314
.
BRAMWELL
,
C. D.
WHITEFIELD
,
G. R.
1974
Biomechanics of Pteranodon. Philosophical Transactions of the Royal Society of London, B
 ,
274
:
503
592
.
COOMBS
,
F.
1978
The Crows.
 
London
:
Batsford
.
DE BEER
,
G. R.
1954
Archaeopteryx lithographica.
 
London
:
British Museum
(Natural History).
DE BEER
,
G. R.
1964
Archaeopteryx. In
A. L.
Thomson
(Ed.)
,
A Hew Dictionary of Birds. Edinburgh: Nelson.
 
GREENEWALT
,
C. H.
1975
The flight of birds. Transactions of the American Philosophical Society (NS)
 ,
65
:
1
65
.
HEILMANN
,
G.
1926
The Origin of Birds.
 
London
:
Witherby
.
HEPTONSTALL
,
W. B.
1970
Quantitative assessment of the flight of Archaeopteryx. Nature, London
 ,
228
:
185
186
.
HEPTONSTALL
,
W. B.
1971
Reply to “Flying ability of Archaeopteryx”. Mature, London
 ,
231
:
128
.
HOPSON
,
J. A.
1977
Relative brain size and behaviour in archosaurian reptiles. Annual Review of Ecology and Systematics
 ,
8
:
429
448
.
JERISON
,
H. J.
1968
Brain evolution and Archaeopteryx. Mature, London
 ,
219
:
1381
1382
.
KERMACK
,
K. A.
HALDANE
,
J. B. S.
1950
Organic correlation and allometry. Biometrika
 ,
36
:
30
41
.
MALOIY
,
G. M. O.
ALEXANDER
,
R. McN.
NJAU
,
R.
JAYES
,
A. S.
1979
Allometry of the legs of running birds. Journal of Zoology, London
 ,
187
:
161
167
.
MCNAB
,
B. K.
1978
The evolution of endothermy in the phylogeny of mammals. American Naturalist
 ,
112
:
1
21
.
OLSON
,
S. L.
FEDUCCIA
,
A.
1979
Flight capability and the pectoral girdle of Archaeopteryx. Nature, London
 ,
278
:
247
248
.
OSTROM
,
J. H.
1976a
Archaeopteryx and the origin of birds. Biological Journal of the Linnean Society
 ,
8
:
91
82
.
OSTROM
,
J. H.
1976b
Some hypothetical anatomical stages in the evolution of avian flight. Smithsonian Contributions in Paleobiology
 ,
27
:
1
21
.
OSTROM
,
J. H.
1978
The osteology of Compsognathus longipes Wagner, Zitteliana
 ,
4
:
73
118
.
OWEN
,
R.
1863
On the Archeopteryx of von Meyer, with a description of the fossil remains of a long-tailed species, from the lithographic limestone of Solenhofen. Philosophical Transactions of the Royal Society of London
 ,
153
:
33
47
.
RADINSKY
,
L.
1978
Evolution of brain size in carnivores and ungulates. American Naturalist
 ,
112
:
815
831
.
SWINTON
,
W. E.
1958
Fossil Birds. London: British Museum (Natural History).
 
SWINTON
,
W. E.
1960
The origin of birds
. In
A. J.
Marshall
(Ed.)
,
Biology and comparative physiology of birds
 ,
1
.
London
:
Academic Press
.
TATNER
,
P.
1980
The ecology of urban magpies (Pica pica L.).
  Ph.D. thesis, University of Manchester.
WALKER
,
A. D.
1980
The pelvis of Archaeopteryx. Geological Magazine
 ,
117
:
595
600
.
WELLNHOFER
,
P.
1974
Das fünfte Skelettexemplar von Archaeopteryx. Palaeonlographica, A
 ,
147
:
169
216
.
YALDEN
,
D. W.
1971a
The flying ability of Archaeopteryx. Ibis
 ,
113
:
349
356
.
YALDEN
,
D. W.
1971b
Flying ability of Archaeopteryx. Nature, London 231. 127–128.
 
YALDEN
,
D. W.
1971c
Archaeopteryx again. Nature, London
 ,
234
:
478
479
.