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Figure 19 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 19. Cross sections (A–D; all × 1.5) and ontogenetic trajectories (E–H) of Cymaclymenia costellata (Münster, 1832) from the Rhenish Mountains of Germany. (A) Specimen MB.C.22693 (Korn 1975 Coll.) from Reigern. (B) Specimen MB.C.22694 (Korn 1974 Coll.) from Reigern. (C) Specimen MB.C.22695.2 (Korn 1977 Coll.) from Oberrödinghausen. (D) Specimen MB.C.22695.3 (Korn 1977 Coll.) from Oberrödinghausen. (E) Conch width index (ww / dm). (F) Umbilical width index (ww / wh). (G) Whorl width index (uw / dm). (H) Whorl expansion rate (WER).

Figure 18 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 18. Cymaclymenia costellata (Münster, 1832) from the Rhenish Mountains (Germany); all × 1.0. (A) Specimen MB.C.22692 (Korn 1974 Coll.) from Reigern. (B) Specimen MB.C.4179 (Denckmann 1900 Coll.) from Wettmarsen. (C) Specimen MB.C.22695.1 (Korn 1977 Coll.) from Oberrödinghausen. (D) Specimen MB.C.22700 (Schindewolf 1931 Coll.) from Hauern near Braunau. (E) Specimen MB.C.22697 (Korn 1987 Coll.) from Effenberg. (F) Specimen MB.C.4185 (Lotz and Denckmann 1900 Coll.) from Langenholthausen. (G) Specimen MB.C.22701 (Denckmann 1895 Coll.) from Hauern. (H) Specimen MB.C.4202.2 (purchased 1903) from Hauern. (I) Specimen MB.C.4202.1 (purchased 1903) from Hauern.

Figure 15. Cymaclymenia formosa n in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 15. Cymaclymenia formosa n. sp. from the Anti-Atlas of Morocco; all × 1.0. (A) Holotype MB.C.22609.1 (Korn 1995 Coll.) from Erfoud. (B) Paratype MB.C.22669.1 (Wendt Coll.) from Hamar Laghdad. (C) Paratype MB.C.22669.2 (Wendt Coll.) from Hamar Laghdad. (D) Paratype MB.C.22669.3 (Wendt Coll.) from Hamar Laghdad. (E) Paratype MB.C.22649.1 (Korn 2009 Coll.) from Lambidia (Aguelmous). (F) Paratype MB.C.22649.2 (Korn 2009 Coll.) from Lambidia (Aguelmous). (G) Paratype MB.C.22669.4 (Wendt Coll.) from Hamar Laghdad.

Figure 1 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 1. Modes of allometry expressed in ammonoid conchs, exemplified in the conch width index (CWI) of modelled and real ammonoids (Korn, 2012). (A) Isometry (stable allometry coefficient α = 1). (B) Monophasic linear allometry (stable α; α <1). (C) Monophasic nonlinear allometry (decreasing α). (D) Biphasic linear allometry (succession of two different allometry coefficients α). (E) Triphasic linear allometry (succession of three different allometry coefficients α). (F) Triphasic non-linear allometry in the Early Carboniferous example Cravenoceras leion Bisat, 1930 (ontogenetically variable allometry coefficient α).

Figure 11. Procymaclymenia ebbighauseni n in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 11. Procymaclymenia ebbighauseni n. sp. from the Anti-Atlas of Morocco; all × 1.0. (A) Paratype MB.C.22619.1 (Ebbighausen and Korn 2009 Coll.) from Madène el Mrakib. (B) MB.C.22621.1 (Ebbighausen and Korn 2009 Coll.) from Madène el Mrakib. (C) Paratype MB.C.22665.1 (Korn 1995 Coll.) from El Atrous. (D) Paratype MB.C.22665.2 (Korn 1995 Coll.) from El Atrous. (E) Paratype MB.C.22620.2 (Ebbighausen and Korn 2009 Coll.) from Madène el Mrakib. (F) Paratype MB.C.22620.1 (Ebbighausen and Korn 2009 Coll.) from Madène el Mrakib. (G) Paratype MB.C.22622.1 (Ebbighausen and Korn 2009 Coll.) from Madène el Mrakib.

Figure 14 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 14. Cross sections (A–I; all × 1.5) and ontogenetic trajectories (J–M) of Cymaclymenia subvexa n. sp. from the Anti-Atlas of Morocco. (A) Paratype MB.C.22647.1 (Korn 2009 Coll.) from Madène el Mrakib. (B) Paratype MB.C.22686.1 (Wendt Coll.) from Khorb et Attil. (C) Paratype MB.C.22675 (Wendt Coll.) from Bou Ifarherioun. (D) Paratype MB.C.22636.2 (Korn 1998 Coll.) from Madène el Mrakib. (E) Paratype MB.C.22682 (Wendt Coll.) from Taourirt. (F) Paratype MB.C.22686.2 (Wendt Coll.) from Khorb et Attil. (G) Paratype MB.C.22683.1 (Wendt Coll.) from Taourirt. (H) Paratype MB.C.22684.1 (Wendt Coll.) from Taourirt. (I) Paratype MB.C.22636.3 (Korn 1998 Coll.) from Madène el Mrakib. (J) Conch width index (ww / dm). (K) Umbilical width index (ww / wh). (L) Whorl width index (uw / dm). (M) Whorl expansion rate (WER).

Figure 26 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 26. Cross sections (A, C; all × 1.5), photograph (B; × 1.0) and ontogenetic trajectories (D–G) of Cymaclymenia carnata n. sp. from the Anti-Atlas of Morocco. (A, B) Holotype MB.C.22654 (Kullmann Coll.) from Aguelmous. (C) Paratype MB.C.22645 (Korn 2009 Coll.) from Madène el Mrakib. (D) Conch width index (ww / dm). (E) Umbilical width index (ww / wh). (F) Whorl width index (uw / dm). (G) Whorl expansion rate (WER).

Figure 9 in A morphometric approach to conch ontogeny of Cymaclymenia and related genera (Ammonoidea, Late Devonian)

Figure 9. Ontogenetic pathways of six cymaclymeniid species in the morphospace calculated with morphometric data: (A) Procymaclymenia ebbighauseni n. sp., (B) Cymaclymenia subvexa n. sp., (C) Cymaclymenia formosa n. sp., (D) Cymaclymenia lambidia n. sp., (E) Cymaclymenia carnata n. sp. and (F) Postclymenia calceola n. sp.

Fig. 9 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 9. Paucitornoceras paucistriatum (d'Archiac & de Verneuil, 1842); MB.C.30414 (Koch Coll.) from Oberscheld. Scale bar units = 1 mm.

Fig. 7 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 7. Epitornoceras mithracoides (Frech, 1888), specimens from the Volpertseiche Mine near Oberscheld (both Koch Coll.). A. Lectotype (MB.C.469). B. Suture line of lectotype (MB.C.469); at dm = 43.5 mm; ww = 15.0 mm; wh = 25.5 mm. C. Paralectotype (MB.C.470). Scale bar units = 1 mm.

Fig. 8 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 8. Lentitornoceras materni gen. et sp. nov., holotype (MB.C.30413; Lotz 1901–1902 Coll.) from Oberscheld. A. Ventral view, lateral view and dorsal projection. B. Suture line; at dm = 26.0 mm; ww = 6.4 mm; wh = 15.2 mm. C. Growth line course; at dm = 26.0 mm; ww = 6.4 mm; wh = 15.2 mm. Scale bar units = 1 mm.

Fig. 4 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 4. Tornoceras typus (Sandberger & Sandberger, 1851), reproduction of the lectotype illustrations by Sandberger & Sandberger (1850–1856, pl. 10 fig. 14) and the photography by M.R. House in Becker (1993, pl. 3 figs 1–2). Scale bar units = 1 mm.

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Fig. 5. Tornoceras frechi Wedekind, 1918. A in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 5. Tornoceras frechi Wedekind, 1918. A. Specimen MB.C.834 (Beyrich Coll.) from Sessacker near Oberscheld. B. Suture line of specimen MB.C.834 (Beyrich Coll.); at ww = 4.5 mm, wh = 5.5 mm. C. Specimen MB.C.30411 (Dannenberg Coll.) from Sessacker near Oberscheld.D. Specimen MB.C.4490 from Sessacker Oberscheld. Scale bar units = 1 mm.

Fig. 6 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 6. Epitornoceras mithracoides (Frech, 1888), reproduction in original size of the illustration of the type material; paralectotype (MB.C.470) and lectotype (MB.C.469) by Frech (1888).

Fig. 2 in The tornoceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 2. Givetian and Frasnian ammonoid stratigraphy (after Becker & House 2000), probable extent of the Red Ironstone of Dillenburg and probable position of the ammonoid species described here.

Fig. 17 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 17. Koenenites lamellosus (Sandberger & Sandberger, 1851). A. Specimen MB.C.22184 (Koch Coll.) from Oberscheld (Anna Mine). B. Specimen MB.C.22183 (Dannenberg Coll.) from Oberscheld (Rinkenbach Mine). C. Specimen MB.C.4306.1 (Koch Coll.) from Oberscheld (Anna Mine). D. Specimen MB.C.4306.2 (Koch Coll.) from Oberscheld (Anna Mine). E. Specimen MB.C.4306.3 (Koch Coll.) from Oberscheld (Anna Mine). Scale bar units = 1 mm.

Fig. 14 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 14. Darkaoceras galeatum (Matern, 1931). A. Suture line of specimen MB.C.3633 (Ahlburg Coll.) from Oberscheld (Königszug Mine), at ww = 10.7 mm, wh = 16.5 mm. B–E. Ontogenetic trajectories of the cardinal conch parameters. Scale bar units = 1 mm.

Fig. 8 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 8. Ponticeras aequabile (Beyrich, 1837). A. Specimen MB.C.4291 (Koch Coll.) from Oberscheld. B. Specimen MB.C.4290 (Kauth Coll.) from Oberscheld. C. Specimen MB.C.5576 (Erbreich Coll.) from Oberscheld. D. Lectotype MB.C.4289.1 (Beyrich 1835 Coll.) from Oberscheld (Sessacker). E. Specimen MB.C.4289.2 (Erbreich Coll.) from Oberscheld. Scale bar units = 1 mm.

Fig. 21 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 21. Acanthoclymenia planorbis (Sandberger & Sandberger, 1851).A. Lectotype 46a in the Wiesbaden collection from Oberscheld; photograph and reproduction of the figure of Sandberger & Sandberger (1850–1856: pl. 9 fig. 3a). B. Paratype 46b in the Wiesbaden collection from Oberscheld; photograph and reproduction of the figure of Sandberger & Sandberger (1850–1856: pl. 9 fig. 3). C. Probably lost specimen; photograph and reproduction of the figure of Sandberger & Sandberger (1850–1856: pl. 9 fig. 3d, e). Scale bar units = 1 mm.

Fig. 6 in The early gephuroceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea)

Fig. 6. Pseudoprobeloceras pernai (Wedekind, 1918). A. Suture line of specimen MB.C.30417.1 (Etzold 1910 Coll.) from Oberscheld ("Tiefe Grube"), at dm = 27.0 mm, ww = 9.0 mm, wh = 11.0 mm. B. Suture line of specimen MB.C.30418, probably from Oberscheld, at dm = 48.3 mm, ww = 11.9 mm, wh = 15.6 mm. C–F. Ontogenetic trajectories of the cardinal conch parameters. Scale bar units = 1 mm.