| [Thread Prev] | [Thread Next] | [Thread Index] | [Date Prev] | [Date Next] | [Date Index] |
Hi Shirley, They most likely are referring to the type of conodont element. Conodont apparatuses have multiple types of elements in them, similar to the different types of teeth that we have. There are several systems for designating the types, based on what we think are homologous from one taxon to another. A good reference for the Pa/Pb scheme is W. C. Sweet, "The Conodonta". Oxford Monographs on Geology and Geophysics No. 10. 1988 A more modern scheme has been suggested and is used broadly. Here's a good reference: Purnell, M., P. Donoghue and R. Aldridge 2000 Orientation and anatomical notation in conodonts. Journal of Paleontology 74:113-122. Hope that this helps. On Thursday 05 January 2006 12:55, van Heck, Shirley SIEP-EPT-SCRT wrote: > Can anyone tell me what the abbreviations Pa and Pb mean behind the names > of conodonts? > > Thanks, > > groeten / regards, > > Shirley E. van Heck > Staff stratigrapher > Shell International Exploration and Production > 200, N. Dairy Ashford > Houston, Texas 77079 > USA > Tel: + 1 281 544 2638 > Email: Shirley.vanheck@shell.com -- Dr. Peter D. Roopnarine, Assoc. Curator Department of Invertebrate Zoology & Geology California Academy of Sciences 875 Howard St. San Francisco CA 94103 Phone: (415) 321-8271 FAX: (415) 321-8615 http://zeus.calacademy.org/roopnarine/peter.htm "Description must be nonlinear, and prediction must be linear." Alan M. Turing
Partial index: