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Table 1 Measurements of Sepiid cuttlebones arranged in different subgenera, showing ratios of different morphological features

From: Morphological disparity in extant and extinct sepiid phragmocones: morphological adaptions for phragmocone strength compared to those related to cameral liquid emptying hypotheses

  Known maximum depth (m) Mantle length (mm) Width/length Length of siphon/area of lost loculus % last loculus/total area Length of siphon/area of last loculus % last loculus/total area
Acanthosepia
 S. stellifera 200 120 0.339 0.016 0.24777758 0.06274 0.24777758
 S. smithi 138 150 0.334 0.013 0.284545469 0.04581 0.28454547
 S. lycidas 100 380 0.336 0.015 0.356751892 0.04103 0.35675189
 S. brevimana 100 110 0.456 0.009 0.397916395 0.0238 0.39791639
 S. savignyi 50 190 0.38 0.007 0.417670274 0.01673 0.41767027
 S. cultrata 803 120 0.35 0.006 0.420648653 0.01342 0.42064865
 S. recurvirostra 140 170 0.287 0.009 0.460575349 0.01954 0.46057535
 S. whitleyana 128   0.37 0.005 0.472523984 0.00967 0.47252398
 S. esculenta 100 180 0.316 0.005 0.520144394 0.01032 0.52014439
 S. rozella 183 140 0.341 0.006 0.592817625 0.0107 0.59281763
Sepia
 S. zanzibarica 125 250 0.322 0.11 0.02693217 4.07948 0.02693217
 S. tuberculata 0.472 0.195675073 0.19567507
 S. probahari 100 130 0.329 0.014 0.339751092 0.04241 0.33975109
 S. bandensis 50 70 0.443 0.01 0.378875429 0.02641 0.37887543
 S. pharaonis 130 420 0.331 0.39541982 0.39541982
 S. ramani 100 375 0.281 0.012 0.428986858 0.02855 0.42898686
 S. papuensis 155 110 0.32 0.007 0.447618688 0.01549 0.44761869
 S. hierredda 100 500 0.309 0.009 0.458652092 0.01995 0.45865209
 S. plangon 83 135 0.285 0.011 0.487355363 0.02283 0.48735536
 S. vermiculata 290 287 0.386 0.006 0.498728265 0.01255 0.49872826
 S. grahami 84 82 0.451 0.005 0.545447934 0.00935 0.54544793
 S. simonniana 0.374 0.001 0.558504808 0.00116 0.55850481
 S. elobyana 53 0.365 0.006 0.569278109 0.01007 0.56927811
 S. elliptica 142 175 0.381 0.005 0.586393149 0.00839 0.58639315
 S. latimanus 30 500 0.275 0.005 0.612875219 0.00803 0.61287522
 S. officinalis verm 0.331 0.001 0.641126918 0.00172 0.64112692
 S. officinalis 200 490 0.294 0.005 0.641608779 0.00803 0.64160878
 S. apama 100 500 0.431 0.006 0.669212788 0.00928 0.66921279
 S. bandensis        
Rhombosepia
 S. elegans 500 72 0.268 0.01 0.241716749 0.04213 0.24171675
 S. hierornis 0.392 0.278139121 0.27813912
 S. orbignyana 570 120 0.259 0.01 0.278682579 0.0351 0.27868258
 S. madokai 200 100 0.329 0.008 0.372213483 0.02098 0.37221348
 S. sulcata 404 97 0.289 0.007 0.399168231 0.01776 0.39916823
 S. hedleyi 1100 83 0.378 0.007 0.49543419 0.01373 0.49543419
Anomalosepia
 S. australis 345 85 0.29 0.018 0.134320913 0.13458 0.13432091
 S. omani 210 100 0.264 0.005 0.445989493 0.01115 0.44598949
Doratosepia
 S. trygonina 410 140 0.195 0.011 0.210641424 0.05409 0.21064142
 S. bertheloti 156 175 0.248 0.23076413 0.23076413
 S. kobiense 200 90 0.201 0.011 0.235882452 0.04847 0.23588245
 S. prashadi 200 140 0.261 0.008 0.350295697 0.0236 0.3502957
 S. vossi 140 100 0.292 0.008 0.358668649 0.02334 0.35866865
 S. opipara 184 150 0.295 0.008 0.384575282 0.02137 0.38457528
 S. braggi 86 80 0.202 0.007 0.396286439 0.01703 0.39628644
 S. vietrnamica 104 70 0.226 0.006 0.464228268 0.01363 0.46422827
 S. lorigera 300 250 0.21 0.006 0.467224547 0.01268 0.46722455
 S. arabica 272 88 0.156 0.006 0.566749124 0.01116 0.56674912
 S. andreana 50 120 0.222 0.007 0.578033004 0.01291 0.578033
 S. longipes 300 250 0.23 0.007 0.619835128 0.01057 0.61983513
Sepiella
 S. japonica 50   0.294 0.009 0.411410711 0.02108 0.41141071