FAMILIES AND GENERA OF THE 

 MYCETOZOA OF NORTH AMERICA 



Subclass I. EXOSPOREAE 



Spores developed outside of sporophores. 



Family I. CERATIOMYXACEAE. Sporophores membra- 

 nous, branched; spores white, borne singly on filiform stalks 

 arising from the areolate sporophore. 



Genus 1. Ceratiomyxa Schroet. 



Subclass II. ENDOSPOREAE 



Spores developed within sporangia, plasmodiocarps, or 

 aethalia. 



Order I. AMAUROCHAETALES. Spores violet-brown or 

 purplish gray (ferruginous in Stemonitis axijera and 5. fiavogenita, 

 colorless in Echinostelium) . 



Suborder I. PHYSARIINEAE. Sporangia provided with 

 lime (calcium carbonate). 



Family I. PHYSARACEAE. Lime in the form of minute 

 round granules (sometimes in rounded nodules or absent in 

 Diachea). 



Genus 2. Badhamia Berk. 



3. Physarum Pers. 



4. Fuligo Haller 



5. Physarella Peck 



6. Cienkowskia Rost. 



7. Craterium Trent. 



8. Leocarpus Link 



9. Diderma Pers. 

 10. Diachea Fries 



Family II. DIDYMIACEAE. Lime in crystals deposited 

 outside of the sporangial wall (scanty or none in Leptoderma). 



Genus 11. Didymium Schrad. 



12. Mucilago Mich. 



13. Lepidoderma de Bary 



14. Leptoderma G. Lister 



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