Trinema enchelys
Large shell, c. 155 µm long, with several rows of teeth in its pseudostome - Ecuador

 

 

Trinema grandis (Chardez, 1960)

 

Diagnosis: shell ovoid, elongate and hyaline; ventral side in the same plane as the aperture, while the dorsal surface is convex and bulges; test composed of two types of scales: one type large, the other type small, covering the space between the large scales. Aperture oval or circular, sub-terminal and invaginated, bordered by an inner circle of denticulate apertural-plates.

 

Dimensions: 103 - 134 um long; my measurements: up to 155 µm (Ecuador)

 

Ecology: in mosses.

 

Remarks: Distinction between T. enchelys and this species only by their size.

 

Trinema enchelys
Trinema enchelys
Very large shell from Ecuador, mosses, 155 µm; shell 104 µm
Trinema enchelys
Shell structure