Jaws of a large belemnite and an ammonite from the Aalenian (Middle Jurassic) of Switzerland

Swiss Journal of Palaeontology

Table 1 Measurements (in mm) and ratios of Jurassic coleoid bodies, gladii, rostra and jaws

Taxon	Age	Animal	Rostrum	Mantle/gladius/	Lower jaw	Upper jaw	Lower jaw/mantle	Upper jaw/mantle	Source	Remarks
Acro. raui	Toarc.	350	160	250	10		0.04		Reitner and Urlichs 1983	Deformed
Pass. paxillosa	Toarc.	344	110	240	9		0.038		Reitner and Urlichs 1983	Deformed
Clark. conocauda	Toarc.	240	64	150	9	9	0.06	0.06	Jenny et al. 2019
Geo. simplex	Toarc.			200	20	20	0.1	0.1	Here
Hibolithes semisulcatus	Kimm.	450	150	260	10	20	0.038	0.077	Klug et al. 2010b	No rostrum
Tr. hastiformis	Kimm.			268	28		0.104		Klug et al. 2005	No arms, SMNS 65344
Tr. hastiformis	Kimm.			255	18	24	0.071	0.094	Klug et al. 2005	No arms, SMNS 65345
Plesio. prisca	Kimm.			220		20		0.091	Klug et al. 2010b
Plesio. prisca	Kimm.	320		230	21	20	0.0911	0.087	Klug et al. 2015
Lepto. gigas	Tithon.	720		510	28	30	0.055	0.059	Klug et al. 2005
Lower jaw, PIMUZ 6077	Aalen.		280	560	28		0.05		Here
Upper jaw, PIMUZ 6076	Aalen.		100	200		18		0.09	Here
Acro. quenstedti	Aalen.		95		9.5	9.5	0.1		Here
Acro. conoideus	Aalen.		169		16.9	16.9	0.1		Here

Values in italics indicate uncertain values, extrapolated values or values reconstructed using proportions from other taxa
Acro Acrocoelites (Belemnitida), Clark Clarkeiteuthis (Diplobelida), Hib Hibolithes (Belemnitida), Lept Leptoteuthis (gladius-bearing Octobrachia), Geo Geopeltis (gladius-bearing Octobrachia), Pass Passaloteuthis (Belemnitida), Plesio Plesioteuthis (gladius-bearing Octobrachia), Tr Trachyteuthis (gladius-bearing Octobrachia)