Mark’s Whorl Snail (Vertigo marki)

Mark’s Vertigo Snail was described in 1904 based on “fossil” material that was found on the Bermuda Islands.

The shells reach sizes of about 0,2 cm in height.

“This species has never been documented alive, although empty Recent shells are recorded from leaf litter around church Cave ….” [1]

*********************

References:

[1] Rüdiger Bieler; John Slapcinsky: A case study for the development of an island fauna: recent terrestrial mollusks of Bermuda. Nemouria 44: 1-99. 2000

*********************

Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata, Vol. 25, Pupillidae (Gastrocoptinae, Vertigininae), 1918-1920′

(public domain)

*********************

edited: 05.05.2022