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V.—Note on Ammonites calcar, Zieten
Published online by Cambridge University Press: 01 May 2009
Extract
In his work entitled “Die Versteinerungen Würtembergs” C. H. v. Zieten figured and briefly described a species under the name Ammonites calcar. The description is as follows:“Rücken gewölbt, Rückenlinie spornradförmig gezackt; er hat in dem Baa seiner Rippen und dem erhöhten Saum seiner Windungen grosse Aehnlichkeit mit dem vorhergehenden [i.e. Ammonites bipartitus, Zieten], unterscheidet sich jedoch von ihm sogleich durch seine einfach gezackte Rückenlinie. Aus dem untern Oolith bei Guttenberg.”
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References
page 554 note 1 This work was issued between 1830 and 1834 in twelve parts of six plates each, as follows:–
page 554 note 2 Heft iii, 1831, p. 18, pi. xiii, figs, 7a, b, c.
page 554 note 3 Zieten attributes the species to ‘Benz.,’ but gives no reference to that author. Probably, therefore, Zieten was the first to publish a description of the species, and must be regarded as its author.
page 554 note 4 Heft iii, 1831, p. 18, pi. xiii, figs. 6a, b, c.
page 555 note 1 Bull. Mus. Comp. Zool., vol. i (1864–9), p. 79.
page 556 note 1 This view is supported by the subsequent discovery in the Museum collection of two more of Zieten's type-specimens (Ammonites discoides, p. 21, pi. xvi, figs, la, b, c; and Ammonites polygonius, p. 21, pl. xv, figs. 6a, b, c), both of which were obtained from Dr. Bruckmann.
page 556note 1 The only place of this name in Württemberg that the writer has been able to find is about eight miles due east of Dettingen and is spelt ‘Gutenberg.’ Gammelshausen is near Boll, which is about nine miles north-east of Gutenberg. There is also a discrepancy about the horizon and locality of the two other specimens in the Museum collection that are believed to be Zieten's types.
page 556 note 3 The terms ‘right’ and ‘left’ are used in a purely morphological sense.
page 556 note 4 Quenstedt, F. A.: “Petref. Deutsch.,” Bd. i, Cephalopoden (1846), p. 140; and “Amm. Schwäb Jura,”; Bd. ii (1887), p. 735Google Scholar.
page 556 note 5 Bronn, H. G.: Index palæont., 1848, p. 33Google Scholar.
page 556 note 6 Oppel, A.: “Die Juraformation,” 1856–58, p. 560 (1857)Google Scholar.
page 556 note 7 Giebel, C. G.: “Die Fauna der Vorwelt,” 1852, p. 567Google Scholar.
page 556 note 8 Parona, C. F. & Bonarelli, G.: Mém. Acad. Sci. Savoie, sér. 4, vol. vi, p. 141, 1897Google Scholar.
page 557 note 1 There are four examples (22,324a-d) from the Brown Jura 
Beuren, Württemberg; one (39,026) from Balingen, Württemberg; and four others (C. 7,267a-d) from Germany, but the precise locality of these is not recorded.
page 558 note 1 Bronn, H. G.: Index palæont., 1848, p. 33Google Scholar.
page 558 note 2 Oppel, A.: “Die Juraformation,” 1856–58, p. 560 (1857)Google Scholar.
page 558 note 3 G. Stahl: Corresp.-Blatt Würt. Landwirthsch. Ver., Bd. vi (1824), p. 49, fig. 9. Stahl's description is as follows: —“Er hat eine vertiefte Rückenlinie, deren Seiten nach aussen mit kleinen Zähnen besitzt siud; von jedem Zahn gehen zwei Streifen bis an die in der Mitte der Windungen hinlaufende Streifungslinie, von wo an die andere Hälfte der Windung glatt ist. Er findet sich verkiest bei Gammelshausen im jungern bituminösen Mergelschiefer; erfordert übrigens noeh nähere Untersuchung.”
page 558 note 4 Quenstedt, F. A.: Amm. Schwäb. Jura, Bd. ii (1887), p. 732Google Scholar.
page 558 note 5 Munier-Chalmas: Bull. Soc. Geol. France, ser. 3, vol. xx, No. 6, Comp. rend., p. clxxi, 1892.
page 558 note 6 Parona&G, C. F.. Bonarelli: Mém. Acad. Sci. Savoie, sér. 4, vol. vi, p. 139, 1897Google Scholar.
page 558 note 7 Cossmann, M.: Rev. crit. de Paléozool., vol. ii, p. 75, 1898Google Scholar.