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TABLE 1. Tooth measurements prior to slide preparation. Abbreviations: L = length from the crown (apex) to the basal end; WAPb = width measured anterior-posteriorly at the base; WAPa = width measured anterio-posteriorly at the apex; WLLb = width measured labio-lingually at the base; WLLa = width measured labio-lingually at the apex; PC = dimensions of the pulp cavity. 

Specimen L
(mm)
WAPb
(mm)
WAPa
(mm)
WLLb
(mm)
WLLa
(mm)
PC
(mm)
SNSB-BSPG 2008 XXXVII 1a 70.9 32.4 15.0 23.4 13.2 20.6 x 10.6
SNSB-BSPG 2008 XXXVII 2a 71.9 27.1 10.9 25.6 8.8 17.4 x 19.2
SNSB-BSPG 2008 XXXVII 3a 61.4 18.2 9.8 16.9 7.8 11.7 x 10.3
SNSB-BSPG 2008 XXXVII 4a 65.9 22.0 8.5 20.6 7.5 10.0 x 11.8
SNSB-BSPG 2008 XXXVII 5a 72.5 22.3 7.1 17.3 5.4 17.2 x 11.0

 

TABLE 2. Comparison of body mass (BM), tooth formation rates (TFR) and replacement rates (TRR) in different archosaurs. The tooth formation time and predicted replacement rate for the spinosaurine (bold) are from this study. Key: 1 = Erickson (1996a), 2 = D’Emic et al. (2019), 3 = D’Emic et al. (2013), 4 = Schwarz et al. (2015), 5 = Henderson (2018).

Species Taxonomy BM (kg) TFR (d) TRR (d)
Spinosaurine Theropoda 65005 271 59-68
Albertosauridae indet. Theropoda 20122 5191 4541
Allosaurus Theropoda 25412 3592 1042
Ceratosaurus Theropoda 9662 3372 1072
Deinonychus Theropoda 972 4131 2901
Majungasaurus Theropoda 16142 2932 562
Tyrannosaurus Theropoda 76932 9331 7771
Camarasaurus Sauropoda 289012 3153 623
Dicraeosaurus Sauropoda 73112 1914 204
Diplodocus Sauropoda 319962 1873 353
Mamenchisaurus Sauropoda 197702 2723 983
Nigersaurus Sauropoda 21952 1843 143
Patagosaurus Sauropoda 272212 2063 583
Titanosauria indet. Sauropoda NA 1883 203
Massospondylus Sauropodomorpha 4882 1533 243
Maiasaura Ornithischia 36562 2811 581
Prosaurolophus Ornithischia 31122 3231 811
Edmontosaurus Ornithischia 75862 3391 501
Triceratops Ornithischia 135362 3811 831

 

TABLE 3. Number of growth lines counted in the different thin sections. Abbreviations: C = cross section, L = longitudinal section.

Specimen Section
type
No. of growth
lines
SNSB-BSPG 2008 XXXVII 1b C 265-271
SNSB-BSPG 2008 XXXVII 1c C 157
SNSB-BSPG 2008 XXXVII 1d C 197
SNSB-BSPG 2008 XXXVII 1e C 188-209
SNSB-BSPG 2008 XXXVII 2b C 190
SNSB-BSPG 2008 XXXVII 2c C 260
SNSB-BSPG 2008 XXXVII 3b C 143
SNSB-BSPG 2008 XXXVII 4b C 192
SNSB-BSPG 2008 XXXVII 4c L 200-210
SNSB-BSPG 2008 XXXVII 5b L 217

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