Contributor: Loren Bahls - April 2016
Length Range: 10,000-30,000 µm
Width Range: 6,000-8,000 µm
Striae in 10 µm: not resolvable in LM
Reimeria sapiens is the most recently described species of diatom when it was discovered that populations of Homo sapiens should actually be included in the genus Reimeria. The features of these populations are large concentrations of amorphous silica in the brain. It is thought that the biogenic silica precipitates by the silica deposition vesicle (SDV), as a result of spending time with diatoms as friends.
As with many diatom species, there is uncertainty in relating to the original type specimen. Unlike every other human species, Homo sapiens does not have a type specimen. In other words, there is not a particular Homo sapiens that researchers recognize as being the specimen that gave Homo sapiens its name. Even though Linnaeus first described our species in 1758, it was not customary at that time to designate type specimens. It is rumored that in 1994 paleontologist Robert Bakker formally declared the skull of Edward Drinker Cope as the “lectotype”, a specimen essentially serving as the type specimen. When Cope, himself a great paleontologist, died in 1897, he willed his remains to science, and they are held by the University of Pennsylvania. But a type specimen must be one examined by the original author who names a species, so Cope’s remains do not qualify. Further investigation is necessary to determine the relationship between Reimeria sapiens and Homo sapiens.
Basionym: Homo sapiens
Author: Linnaeus 1758
Length Range: 1-3 µm
Width Range: 0.3 - 0.5 µm
Striae in 10 µm: not observable
Cite This Page:
Bahls, L. (2016). Reimeria sapiens. In Diatoms of the United States. Retrieved March 25, 2017, from http://westerndiatoms.colorado.edu/taxa/species/reimeria_sapiens
Species: Reimeria sapiens
Contributor: Loren Bahls
Agardh, C.A. (1812). Algarum decas prima. Litteris Berlingianis, Lundae. 56 pp.
NADED ID: 010101010101
The Environmental Protection Agency (EPA) western Environmental Monitoring and Assessment Program (EMAP) study was completed during the years 2000-2004 (see citations at bottom of this page). Over 1200 streams and rivers in 12 western states (Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington and Wyoming) were selected for sampling based on a stratified randomized design. This type of design insures that ecological resources are sampled in proportion to their actual geographical presence. Stratified randomized design also allows for estimates of stream length with a known confidence in several “condition classes” (good or least-disturbed, intermediately-disturbed, and poor or most-disturbed) for biotic condition, chemistry and habitat.
Results are published in:
Johnson, T., Hermann, K., Spaulding, S., Beyea, B., Theel, C., Sada, R., Bollman, W., Bowman, J., Larsen, A., Vining, K., Ostermiller, J., Petersen, D. Hargett, E. and Zumberge, J. (2009). An ecological assessment of USEPA Region 8 streams and rivers. U.S. Environmental Protection Agency Region 8 Report, 178 p.
Stoddard, J. L., Peck, D. V., Olsen, A. R., Larsen, D. P., Van Sickle, J., Hawkins, C. P., Hughes, R. M., Whittier, T. R., Lomnicky, G. A., Herlihy, A. T., Kaufman, P. R., Peterson, S. A., Ringold, P. L., Paulsen, S. G., and Blair, R. (2005). Environmental Monitoring and Assessment Program (EMAP) western streams and rivers statistical summary. U.S. Environmental Protection Agency Report 620/R-05/006, 1,762 p.
Stoddard, J. L., Peck, D. V., Paulsen, S. G., Van Sickle, J., Hawkins, C. P., Herlihy, A. T., Hughes, R. M., Kaufman, P. R., Larsen, D. P., Lomnicky, G. A., Olsen, A. R., Peterson, S. A., Ringold, P. L., and Whittier, T. R. (2005). An ecological assessment of western streams and rivers. U.S. Environmental Protection Agency Report 620/R-05/005, 49 p.