Since G. rhoadsi are terrestrial snails, they reproduce using what is known as direct development (Eisenhour et al. 2007).  In direct development, an adult organism produces eggs and the juvenile snail hatches directly from that egg (Eisenhour et al. 2007).  In direct development, there are no larval stages.  The young snail then grows and matures to eventually become an adult organism.   The sculpted glyph is monoecious (Nature Serve, 2009).  This means that each individual snail has both male and female reproductive organs. 

This image shows a typical direct development snail lifecycle.  This is the type of development seen in Glyphyalinia.

Interferences to reproduction along with many other factors cause the sculpted glyph population size to be challenged in certain areas.  For more on the current status of G. rhoadsi in Wisconsin please see the status in Wisconsin tab.