Back to List

Mark Henry Sabaj

Born in Illinois in 1969, Mark Henry Sabaj has a B.S. (1990) and M.S. (1992) from the University of Richmond, Virginia, and a Ph.D. (2002) from the University of Illinois, Urbana-Champaign. He entered the field of ichthyology in 1989 as a field assistant to Drs. William S. Woolcott and Eugene G. Maurakis during their investigation and video documentation of spawning behaviors in nest-building chubs and dace in the streams of eastern North America. His masters thesis documented newly observed reproductive strategies in five species of minnows in the genera Exoglossum, Nocomis, Rhinichthys and Semotilus. In 1992 he became a doctoral student of Lawrence M. Page, and from 1995-2000 served as full time collection manager of fishes at the Illinois Natural History Survey. In 2001 he relocated to Philadelphia to become collection manager of fishes at the Academy of Natural Sciences. Between 1991 and 2005 he published 21 peer-reviewed papers with a total of 15 co-authors on topics that include spawning behaviors in minnows, darters and loricariids, and taxonomic descriptions of seven new species of catfishes, one new subspecies of threadfin, and two new species of crayfishes. Mark has field and collecting experience throughout the United States and in Argentina, Bolivia, Canada, Colombia, Guyana, Mongolia, Peru, Thailand and Venezuela. He is currently a co-Principal Investigator on the All Catfish Species Inventory (, a global project funded by the National Science Foundation to discover and classify all species of catfishes. His area of taxonomic expertise is the catfish family Doradidae (thorny catfishes). He is married to Maria Cristina Pérez (his favorite seining partner) and currently lives in Mt. Airy, Philadelphia.

Contributor Type: Scientific Core Contributor
Institution: Academy of Natural Sciences, Philadelphia, Pennsylvania, USA
Assigned Groups: Siluriformes and Doradidae
Published Tree of Life Pages: View pages
Tree of Life Media Files: View media
Contributor ID: 825

Contribute to the ToL

ToL Contributions

Ways to Contribute

Use of Contributions

Scientific Content

Building Treehouses


  go to the Tree of Life home page