Description

Shell Description 

Color: Tannish-olive to cinnamon-bluff, shell somewhat glossy (Brown and Bruder 1968) 

Shape: Heliciform shell also known as spiraled or of helix form (Dourson 2011)

Size: Diameter of 6.1 - 9.4 mm (Dourson 2011)

Whorls: 5.5 - 6.5 coiled whorls (Dourson 2011)

• Coiled in clockwise manner, dextral (Martin 2000)

• Whorls increasing regularly in size (Brown and Bruder 1968)

• 1st 1.5 whorls are smooth, with the remainder having irregular striae (Brown and Bruder 1968)

• Last whorl possesses small hairs but often lost on older
  shells (Dourson 2011)

• Transverse striae present are poorly developed
   (Dourson 2011)

Shell Anatomy: Umbilicate having a central mark or depression (Dourson 2011)

• Large, blade-like parietal tooth (Dourson 2011)

• Parietal tooth low, situated on low callus (Brown and Bruder 1968)

• Concave or dished inner part of the outer peristome surrounding the mouth (Brown and Bruder 1968)

• Inner peristome is reflected, somewhat covering the narrow, deep umbilicus ( Brown and Bruder 1968)

 

 

 

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