At this next meeting, our VicPS vice-chair Sandy M. S. McLachlan will speak to his paper “Additions and revisions to the inflated Pachydiscidae from the Campanian (Upper Cretaceous) strata of Denman and Hornby islands, British Columbia, Canada; taxonomic implications and insights into mode of life.”
Sandy’s pachydiscid study, published in Journal of Paleontology, 1–2, is open access and can be read at: https://doi.org/10.1017/jpa.2025.10105. An introductory guide to ammonite terminology (in final draft) will be shared prior to the Oct. 8th presentation to assist newer members with scientific terminology.
This paper, which is a study of a group of conservative ammonites from the Late Cretaceous that lived approximately 90–66 million years ago, allows for greater refinement of age placement and paleoecological interpretations. Over 100 specimens were examined from the Nanaimo Group rocks among the Gulf Islands of southern British Columbia in the eastern North Pacific. A reappraisal of this group addresses the range of variation within several forms, proposes a consistent framework of diagnostic characters, and sees the erection of a new species with description of the full development from juvenile to adult. Exclusive death assemblages of the new species support the inference of a gregarious mode of early life.
The meeting is in-person and on-line.
Physical Address:
Branta Biostratigraphy Ltd. (office of Ed Davies, Paleontologist and VicPS member)
2680 Seaview Road, Victoria, BC.
Park in the driveway, or on street if driveway is full.
Online Access (open to the public):
Zoom (7:30PM PDT)
https://us06web.zoom.us/j/88390132369?pwd=0SxRq94aGGWp7mlxxZdhvq9PwwGxac.1
Meeting ID: 883 9013 2369
Passcode: 413249
