Fig. 4 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; Cornwallis Island
• Online Access: https://dx.doi.org/10.5281/zenodo.13275190; https://zenodo.org/doi/10.5281/zenodo.13275190

Fig. 4. Silurian graptolites Testograptus testis (Barrande, 1850) (A, B) and Cochlograptus veles (Richter, 1871) (C–F) in direct comparison. Specimens from SB−E, 49 m, Snowblind Creek, Cornwallis Island. A. Fragment of specimen with pseudovirgula development, GSC34920; A1, stereopair showing isolated nema; A2, enlargement to show nema area, and infilling between pseudovirgula and nema. B. Stereopair of dorso−lateral view of specimen with free nema and subsequent development of rhabdosome via a pseudovirgula, GSC34921. (C–F) Cochlograptus veles (Richter, 1871); from CP98, 6.4 m, Cape Phillips, Cornwallis Island (C, F) and from CM3, 6.1 m, Cape Manning Cornwallis Island (D, E). C. Extremely well−preserved specimen, showing blunt−ended sicula and flexure; note well−developed rutellum, GSC34922. D. Ventro−lateral view of well−preserved specimen showing four complete thecae, GSC34923. E. Infrared image showing strongly curved sicula, GSC34924. F. Views of a specimen showing a pseudovirgula (arrows) and ... : 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 456, DOI: 10.4202/app.2008.0307, http://zenodo.org/record/13275176 ...