Haplocion pasonis, commonly known as the robust holospira, is a species of air-breathing land snail in the family Holospiridae.
This species is found in Texas, USA.Kathryn E. Perez. (last edited September 12, 2006) Land Snail List for Texas . accessed 25 June 2009.
References
Dall W. H. (1895). "On a new species of Holospira from Texas". The Nautilus 8(10): 112.
External links Manual of Conchology. volume 15, Urocoptidae. pages 90-91.