minuscula

I think the resemblance is a bit stronger than "somewhat", for after I examined the drawings in Pilsbry, I had no idea how tell if the shells I had were minuscula or inermis.

How I determined this was Hawaiia minuscula AYDIN 2007

As I was about to give up, Tim Pearce came to the rescue and pointed out that the teeth on the radulae of H. minuscula and L. inermis have different shapes, the most significant being the shapes of the marginal teeth, blade-like in minuscula but serrated in inermis see the drawings below.

How I determined this was Hawaiia minuscula AYDIN 2007

According to Pilsbry2 the shells of the species in the subgenus Hebetodiscus "resemble Hawaiia minuscula somewhat, but are smoother and more depressed".

Archive 2007-02-01 AYDIN 2007

Frank C. Baker3 gave the "most common" habitat of H. minuscula in Illinois as "woodlands of oak, hickory and sycamore".

How I determined this was Hawaiia minuscula AYDIN 2007

Frank C. Baker3 gave the "most common" habitat of H. minuscula in Illinois as "woodlands of oak, hickory and sycamore".

Archive 2007-02-01 AYDIN 2007

I think the resemblance is a bit stronger than "somewhat", for after I examined the drawings in Pilsbry, I had no idea how tell if the shells I had were minuscula or inermis.

Archive 2007-02-01 AYDIN 2007

In contrast, this is what Hubricht4 said about H. minuscula: A species of bare ground.

Archive 2007-02-01 AYDIN 2007

The teeth of Lucilla inermis (left) and Hawaiia minuscula (right).

Archive 2007-02-01 AYDIN 2007

As I was about to give up, Tim Pearce came to the rescue and pointed out that the teeth on the radulae of H. minuscula and L. inermis have different shapes, the most significant being the shapes of the marginal teeth, blade-like in minuscula but serrated in inermis see the drawings below.

Archive 2007-02-01 AYDIN 2007

In contrast, this is what Hubricht4 said about H. minuscula: A species of bare ground.

How I determined this was Hawaiia minuscula AYDIN 2007