Requested reference
Treviranus, G. R. (1812). Ueber den innern Bau der Arachniden. Nürnberg, vi+48 pp., 5 pl. 
-- Show included taxa
Treviranus, G. R. (1812). Ueber den innern Bau der Arachniden. Nürnberg, vi+48 pp., 5 pl. -- Show included taxa