Alex C. 0 Report post Posted April 6, 2006 I believe this nymph is a Stenonema vicarium(march brown), what do you think? Quote Share this post Link to post Share on other sites
fly time 0 Report post Posted April 6, 2006 Correctamundo, these are some good picts. Quote Share this post Link to post Share on other sites
Taxon 0 Report post Posted April 6, 2006 OLB- The nymph appears to be sufficiently coated (with something) that keys which would lead one to precise identification are obscured. In any event, the species that used to be classified as Stenonema vicarium has been re-classified as Maccaffertium vicarium. Quote Share this post Link to post Share on other sites
Ethan Bright 0 Report post Posted May 24, 2006 Hi Roger and all: Roger is right is his caution that its identification cannot be made based on the photograph. Further, unless one is really familar with local species composition and phenology, species-level identification really should be made on the basis of gill and mouthpart structure. One can also use abdominal markings, but this has often been shown to be variable. I'm not convinced of the raising of Maccaffertium to generic level. McCafferty's paper from which this is taken is vague on evidence and lacking in systematic and cladistic treatment justifying this move. (Although his Ph.D. student Luke Jacobus, whom I respect, says it's probably valid). At this point I'm a skeptic, and until a more detailed analysis on this issue is published, I will follow the conservative view of maintaining Stenonema as genus, and Maccaffertium as subgenus. Cheers, Ethan Quote Share this post Link to post Share on other sites
