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Haplomitriaceae
http://www.nybg.org/bsci/hcol/bryo/Haplomitriaceae.html
Links to information about the specimens in the American Bryophyte Catalogue of The New York Botanical Garden.
Haplomitrium mnioides
http://www.science.siu.edu/landplants/Hepatophyta/images/Haplo.sperm.JPEG
Color drawing of reconstruction of spermatozoid.