Fig. 2 in Convergent evolution of two Silurian graptolites ...

• Main Authors: Lenz, Alfred C., Melchin, Michael J.
• Format: Still Image
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Hemichordata; Pterobranchia; Monograptidae; Cochlograptus; Testograptus; Cape Sir John Franklin; Cornwallis; Devon Island; Island C; Rookery Creek; Cornwallis Island
• Online Access: https://dx.doi.org/10.5281/zenodo.13275183; https://zenodo.org/doi/10.5281/zenodo.13275183

Fig. 2. Silurian graptolites Cochlograptus veles (Richter, 1871) (A, B) and Testograptus testis (Barrande, 1850) (C–F) in direct comparison. Chemically cleared and infrared views of specimens from collection SJF−02, talus nodule 2A, Cape Sir John Franklin, Devon Island. A. Variously oriented views of specimens with two developed thecae and common canal of theca 3, GSC34908; A1, profile view; A2, enlargement showing normal porus; A3, dorso−lateral view; A4, ventro−lateral view. B. Ventral and lateral views of specimen, GSC34909; B1, ventral view showing tip of sicula (clear region) and well marked thickened interthecal septum (arrow); B2, profile showing well−developed nema. (C–F) Testograptus testis (Barrande, 1850). Chemically cleared and infrared images of specimens from collection RC01−2, 2.5 m, Rookery Creek, Cornwallis Island. C. Largest specimen profile showing deflexed nema distal of sicula tip, and hollow, keel−like protuberance distal of sicula tip (arrow), GSC34910. D. Profile of specimen with only ... : Published as part of Lenz, Alfred C. & Melchin, Michael J., 2008, Convergent evolution of two Silurian graptolites, pp. 449-460 in Acta Palaeontologica Polonica 53 (3) on page 453, DOI: 10.4202/app.2008.0307, http://zenodo.org/record/13275176 ...