Glyphyalinia species are sometimes present in forest leaf-litter within the jap a part of North America. They’ve a low, translucent shell that’s typically about half a centimetre in diameter. Whorls of the shell enhance usually in dimension and are marked by a collection of strongly impressed radiating strains along with finer progress strains. The umbilicus of the shell varies between species from fully absent to fairly extensive (Burch & Pearce 1990). The delicate physique of the animal varies in coloration, once more relying on species. That of G. roemeri is all white aside from the eyes; that of G. wheatleyi is nearly uniformly black. The reproductive system of Glyphyalinia (that are hermaphroditic) features a well-developed epiphallus and a definite, ovoid spermathecal sac (Baker 1930).
A number of species of Glyphyalinia could also be discovered residing in a single patch of forest although, at current, we all know little about how (and whether or not) micro-habitats are partitioned between species. Some species appear to tolerate all kinds of soil sorts and are correspondingly broadly distributed. Others are extra selective and localised; some could also be thought-about endangered by habitat degradation. Even supposedly widespread species could also be extra weak than appreciated: not less than some could signify clusters of intently associated species slightly than actually uniform populations. These tiny snails could be notoriously troublesome to check, making for a threat that they may simply slip away barely seen.
Baker, H. B. 1930. The North American Retinellae. Proceedings of the Academy of Pure Sciences of Philadelphia 82: 193–219.
Burch, J. B., & T. A. Pearce. 1990. Terrestrial Gastropoda. In: Dindal, D. L. (ed.) Soil Biology Information pp. 201–309. John Wiley & Sones: New York.