I had the very great honour of having this fellow, a new species of nektonic carnivorous ammonite, named after me by paleontologist Louse Longridge from the University of British Columbia. I'd met Louise as an undergrad and was pleased as punch to hear that she would be continuing the research by Dr. Howard Tipper.
We did several expeditions over three field seasons to the Taseko Lake area of the Rockies. We were joined by many wonderful researchers from Vancouver Island Palaeontological Society and Vancouver Paleontological Society, as well as the University of British Columbia.
The fossils found here are from the Lower Jurassic, Lower Sinemurian, Little Paradise Member of the Last Creek formation. Several ammonites species can be found here including Arnioceras semicostatum and Arnioceras miserable.
Both Dan Bowen, VIPS and John Fam, VanPS, were instrumental in planning those fossil field trips. The VIPS has been especially active in planning and executing excellent research expeditions that have brought many new fossil species to light. These trips were no exception. They were to yield many new species and help mint out a new Ph.D. We endured elevation sickness, rain, snow, grizzly bears and very chilly nights (we were sleeping next to a glacier at one point) but were rewarded by the enthusiastic crew, helicopter rides (which really cuts down the hiking time) excellent specimens and stunningly beautiful country. We were also blessed with excellent access as the area is closed to collecting except via permit.
Building on the work of Dr. Howard Tipper and Dr. Louise Longridge, along with Taylor et al from 2001, Pengfei Hou did a Master's thesis through UBC in 2014 on Sinemurian (Early Jurassic) stratigraphy at Last Creek, British Columbia and Five Card Draw, Nevada, looking at the paleontological and environmental implications of the assemblages.
As part of that work, he collected over 400 ammonite specimens from the Last Creek Formation in Last Creek, British Columbia and the Sunrise Formation in Five Card Draw, Nevada. The research led to three new species: Tipperoceras n. sp. A, Tmaegoceras obesus n. sp., Arnioceras n. sp.
Reference: PaleoDB 157367 M. Clapham GSC C-208992, Section A 09, Castle Pass Angulata - Jurassic 1 - Canada, Longridge et al. (2008)
Full reference: L. M. Longridge, P. L. Smith, and H. W. Tipper. 2008. Late Hettangian (Early Jurassic) ammonites from Taseko Lakes, British Columbia, Canada. Palaeontology 51:367-404
PaleoDB taxon number: 297415; Cephalopoda - Ammonoidea - Juraphyllitidae; Fergusonites hendersonae Longridge et al. 2008 (ammonite); Average measurements (in mm): shell width 9.88, shell diameter 28.2; Age range: 201.6 to 196.5 Ma. Locality info: British Columbia, Canada (51.1° N, 123.0° W: paleo coordinates 22.1° N, 66.1° W)