Ongoing Research







  • Harvestmen Systematics - I am currently involved in a collaborative project on the systematics and mating system evolution in Leiobunum, a species-rich group of harvestmen that is particularly diverse in eastern North America, Mexico and Japan. Jeff Shultz (University of Maryland) is the leader of the project team, that also includes Rogelio Macías Ordóñez (Instituto de Ecologia, Mexico), Nobuo Tsurusaki (Tottori University, Japan), and Eileen Hebets (Univ. of Nebraska).  This project is supported by the National Science Foundation.  Several of my past and current students (Casey Richart, Shahan Derkarabetian, Maureen McCormack, Steven Thomas) are also working on systematic questions involving harvestmen.

        M Hedin harvestmen pics on Flickr



  • Evolution & Diversity of southern Appalachian Arachnids - I first experienced the southern Appalachians in the mid-1990s, while conducting my Ph.D. research on "cave spiders" (genus Nesticus) of the region. I have been able to continue my studies in these ancient mountains, and more recently have involved several of my graduate students in southern Appalachian research. Most of our recent survey work has focused on cryophilic ("cold loving") arachnids that inhabit the forested uplands of western North Carolina and surrounding states, although we have also been conducting some cave research in the region.  Read More....

Our Mission

We discover and describe arachnid biodiversity, rely upon modern research techniques to explore the evolutionary diversification mechanisms that underlie this amazing diversity, and apply our combined knowledge to efforts of arachnid and habitat conservation

Contact Information:

San Diego State University
San Diego, CA 92182-4614
Office: Life Sciences North, Room 204F
Lab: Life Sciences North, Room 206
fax: 619.594.5676, voice: 619.594.6230
e-mail: mhedin@sciences.sdsu.edu