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Tomasz pisze:- długość: 12m (39-40ft)

Tomasz pisze:zamieszkujących Ameryke Płd, Azje i Afryke.

Tomasz pisze:Opierając się na znalezionych kręgach, naukowcy stwierdzili że Macrurosaurus mierzył około 39-40 stóp (12m).

Tomasz pisze:Acanthopholis platypus.

Tomasz pisze:Typowy gatunek, M. semnus, został opisany przez Seeley'a w 1876.

Tomasz pisze:Właśnie m.in. dzięki wyznaczeniu daty ten dinozaur został sklasyfikowany do tytanozaurów, jedynych zauropodów żyjących w Kredzie.

szerman pisze:Wcześniej przypisywano do makrurozaura kolejnego osobnika, z Barton, a składało się na niego 15 elementów: kręgi ogonowe, fragmentaryczna stopa i pazur do niej należący. Okazało się jednak, że to szczątki ankylozaura Acanthopholis platypus (Seeley, 1869).

M. semnus was based on 25 caudal
vertebrae from Barnwell and another 15 from Barton; other
elements include an ungual, more caudal vertebrae, and a partial
foot (Seeley 1876a). The latter specimen was identified as
belonging to an ankylosaur and, combined with other material,
formed the basis of Acanthopholis platypus Seeley, 1869.
Although from a sauropod, the material cannot be identified
more precisely (Pereda Suberbiola & Barrett 1999).

Seeley (1869, pp. xvii, 21) erected 'Acanthopholis platypus' on the basis of six caudal
centra, one chevron, five articulated metapodials and one phalanx (SMC B.55449-55461) from
Bottisham, a small village east of Cambridge. The metapodials (SMC B55449-55453, metatarsals
I-V) were described and figured by Seeley (1871, pl. 71, and later referred to the sauropod
Macrurosaurus (Seeley 1876, p. 444). This interpretation was followed by Nopcsa (1923). However,
in a hand-written note made by Seeley in his copy of the 1876 paper (document A.6.22: 20 in the
library of the Department of Earth Sciences, University of Cambridge) he stated that 'this view
cannot now be sustained' and regarded all of the material of 'Acanthopholisplatypus' as absolutely
distinct from Macrurosaurus semnus. Coombs (1971, pp. 101-102) compared the metapodials of
' A . platypus' to those of other dinosaurs and decided that the evidence for either referral was
inconclusive. More recently, McIntosh (1990) tentatively referred the metapodials to Macrurosaurus
semnus (provisionally listing ' A . platypus' as a junior synonym of M. semnus). The metapodials
display a number of sauropod synapomorphies, including a short, robust metatarsal I and a 'funnelshaped'
metatarsal V (Upchurch 1993). Several other syntypes, a phalanx and several caudal
vertebrae described by Seeley (1871), may belong to an ankylosaur, but are too incomplete for a
definitive taxonomic designation, and a fragmentary neural spine (SMC B55461) cannot be
identified beyond the level of Dinosauria indeterminate.
Coombs and Maryanska (1990) listed ' A . platypus' as a junior synonym (partim) of
'Acanthopholis horridus'. However, no diagnostic characteristics support this referral. Moreover,
the type material displays no diagnostic characters and ' Acanthopholisplatypus' should be regarded
as a nomen dubium based on indeterminate ankylosaur and sauropod material.

(...)
COOMBS, w. P. Jr 1971. The Ankylosauria. Unpublished Ph.D, dissertation, Columbia University, New York.
University Microfilms International no. 72-1291, Ann Arbor, Michigan.
COOMBS, w. P. & MARYANSKA, T. 1990. Ankylosauria. 45tC483. In WEISHAMPDE. LB.,, DODSOPN. , and OSMOLSKA, H.
(eds). The Dinosauria. University of California Press, Berkeley, 733 pp.
MCINTOSH, J. S. 1990. Sauropoda. 345401. In WEISHAMPEL, D. B., DODSON, P. and OSMOLSKA, H. (eds). The
Dinosauria. University of California Press, Berkeley, 733 pp.
NOPCSA, F. 1923. Notes on the British dinosaurs. Part IV. Acanthopholis. Geological Magazine, 60, 193-199, pls 7-8.
SEELEY, H. G. 1869. Index to the Fossil Remains of Aves, Ornithosauria, and Reptilia from the Secondary Strata
arranged in the Woodwardian Museum of the University of Cambridge. Deighton, Bell and Co., Cambridge,
X + 143 pp
SEELEY, H. G. 1871. On Acanthopholisplatypus (Seeley), a pachypod from the Cambridge Upper Greensand. Annals and
Magazine of Natural History, 8, 305-318, pl. 7.
SEELEY, H. G. 1876. On Macrurosaurus (Seeley), a long tailed animal with procoelous vertebrae from the Cambridge
Upper Greensand, preserved in the Woodwardian Museum of the University of Cambridge. Quarterly
Journal of the Geological Society, London, 32, 44W44.
UPCHURCH, P. 1993. The anatomy, phylogeny and systematics of the sauropod dinosaurs. Unpublished Ph.D.
Thesis, University of Cambridge

szerman pisze:Z kolei George Olschevsky nieoficjalnie (online) umieszcza go w grupie ważnych taksonów z naukowego punktu widzenia.