Table 1

Size and spacing of tooth germs in three species of Malawi cichlids

(a)


Species

Diameter of first tooth

ZOI including first tooth

ZOI medial to first tooth

ZOI distal to first tooth

ZOI from First tooth to second OB

MD length of OB

Width of OB at level of first tooth

Area (μm2) of first tooth


CA

22.91 ± 0.839

51.80 ± 1.298

18.67 ± 0.344

17.99 ± 0.482

8.80 ± 0.56

110.72 ± 7.337

22.21 ± 1.135

528.08 ± 31.348

MZ

17.62 ± 0.149

44.05 ± 0.898

16.50 ± 0.213

12.87 ± 0.322

6.84 ± 0.084

116.62 ± 5.013

23.02 ± 0.382

384.06 ± 4.754

LF

14.87 ± 0.349

39.9 ± 1.697

11.95 ± 0.285

15.24 ± 0.392

7.28 ± 0.545

120.91 ± 3.834

19.41 ± 0.782

268.47 ± 8.084


(b)


Species

Diameter of first tooth

Inter-germ space between first and next medial tooth

Inter-germ space between first and next distal tooth

ZOI from First tooth to second OB

MD length of second row OB

Area (μm2) of first tooth


CA

25.68 ± 0.359

16.64 ± 0.128

14.02 ± 0.096

8.29 ± 0.266

140.02 ± 3.669

684.57 ± 19.248

MZ

18.19 ± 0.231

19.63 ± 0.222

11.96 ± 0.318

10.18 ± 0.434

138.47 ± 2.897

435.09 ± 19.98

LF

18.37 ± 0.437

13.06 ± 1.112

20.33 ± 1.065

8.02 ± 0.295

168.39 ± 5.432

404.15 ± 23.182


(a) We report mean values (three to five individuals) of measurements taken from the expression of shh at the first-tooth stage in the three cichlid species: CA, Cynotilapia afra; MZ, Metriaclima zebra; LF, Labeotropheus fuelleborni. MD, mesiodistal; OB, odontogenic band; ZOI, zone of inhibition. (b) Mean values (three to five individuals) from the 3–4-teeth stage. All values are in micrometres ± SE.

Fraser et al. BMC Biology 2008 6:32   doi:10.1186/1741-7007-6-32

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