Silurian trilobites from southwestern Alaska

• Published in: Journal of Paleontology
• Main Authors: Adrain, Jonathan M., Chatterton, Brian D. E., Blodgett, Robert B.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1995
• Subjects: Greenland; North Greenland; Alaska
• Online Access: http://dx.doi.org/10.1017/s0022336000035241; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000035241

The first Silurian trilobites to be described from Alaska are of late Llandovery (Telychian) age. They occur with original cuticle intact in a white biosparite. Seven species have been identified, including Paracybantyx occidentalis n. sp., Ligiscus smithi n. sp., Calymene s.l. aff. C. iladon Lane and Siveter, 1991, Scotoharpes aff. S. raaschi Norford, 1973, Scharyia sp., a cheirurine belonging to either Radiurus Ramsköld, 1983, or Protocerauroides Chatterton and Perry, 1984, and an undetermined warburgelline. The fauna has close affinity to those described from similar lithologies in the Telychian of North Greenland. Machaeridians occurring with the trilobites include Turrilepas sp., Compacoleus sp., and Lepidocoleus cf. L. britannicus Withers, 1926.