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Additional Information
Haplophrentis reesei is an extinct, enigmatic, tubular fossil known from the Cambrian period, particularly from the Burgess Shale and similar Konservat-Lagerstätten. Its long, slender, and slightly tapering cone-shaped shell, composed of stacked, calcareous plates, has puzzled paleontologists for decades. While its exact phylogenetic placement remains debated, recent studies have suggested affinities with the hyoliths, a group of extinct, cone-shaped animals with a distinctive operculum. Haplophrentis likely lived a benthic, possibly sessile, lifestyle, filtering food particles from the water column. Its unique morphology and the challenges it poses to classification make it a fascinating subject of study for understanding the diversity and evolution of early metazoan life.
References:
Reference to Wikipedia: Haplophrentis
Vendor: FS-JS
SKU Number: SQ5615228
Amecephalus laticaudum from the Middle Cambrian, Spence Shale, Wellsvilles Mtns, Box Elder Co., Utah.
A very rare and complete trilobite.
Full dimensions are listed below.