Last spring I applied for and received a Schuchert and Dunbar Grant-in-Aid to visit Yale University’s Peabody Museum of Natural History and study their collection of insects from the Antero Formation of South Park, Colorado, as part of my thesis on ecological changes during the Eocene and Oligocene. Yale’s collection of Antero insects and plants, while small, is currently the most significant Antero collection in any museum. My advisor at the University of Colorado–Boulder, Dr. Dena Smith, and I thought it was important to examine this historical collection. While we had already borrowed most of the plant specimens, the Peabody has approximately 400 insect specimens (a lot to pack up), and this was a great opportunity to study both those and the plant specimens which were too fragile to loan.
I spent a week photographing and examining the insect fossils with a microscope, and was also able to see the other plant fossils. The trip was very productive for me, as in addition to having a better idea of the insect diversity and sizes, I now have a far better understanding of the lithology (geological characteristics) of the lake shales.
I also determined that Dr. Christopher Durden, who collected the fossils as a student at Yale in the 1960s, was not sorting in the field, as the majority of the insects are extremely tiny, and a few specimens turned out not to be specimens at all, but simply discoloration on the rocks. It was clear that Durden collected anything that looked like it might be a fossil. This is important, as it reassures me that the insect collection will be useful for ecological analysis. However, since Durden was collecting insects and insects and plants are rarely found in equal abundance in the same layers, that explains the small size of the plant collection relative to the insect collection. Unfortunately, while the plants provide an important species list, the sample is too small for statistical analysis.
Unlike Florissant, the majority of the insects present are extremely tiny, hardly visible with the naked eye. Fly larvae and aquatic insects were extremely common. The preservation is often extremely good, showing fine detail of wing venation and patterns on beetle carapaces. Among the plants, I also observed a species previously undescribed in the Antero literature, which may in fact be a new genus or species.
The chance to visit the Peabody was also exciting for other reasons–the collections and workspaces are housed in the new environmental science building, in purpose-built spaces designed for museum collections. The collections spaces are spacious and climate-controlled, with separate air-handling systems to keep down dust and movable shelving with room for further expansion of collections. It was truly inspiring to see what museum collections spaces can look like when built according to modern standards.
Sadly, it is challenging to convey the importance of collections to the public, given their behind-the-scenes nature, and most museums have difficulty obtaining the funding and public support necessary to renovate collections spaces. Museum collections contain a vast amount of our scientific and cultural heritage, and provide invaluable resources for research, education, and exhibit. I believe that ensuring that they receive proper care should be a public priority.
I am extremely grateful to Dr. Derek Briggs, curator of invertebrate paleontology, Dr. Susan Butts, invertebrate paleontology collections manager, and Dr. Leo Hickey, curator of paleobotany, for this opportunity and their assistance during my visit.
Read more about the Antero project…
-Melissa Barton
Photos: Melissa Barton (click for larger images)
The Friends of the Florissant Fossil Beds, Inc. is a nonprofit 501(c)(3) Friends of the Park group supporting