HELIX: Data-driven characterization of Brazilian land snails

The Subulinidae family of Brazilian land snails includes similar species with particular morphometrical characteristics. We surveyed the metro area of the Juiz de Fora/MG city and collected snails from a representative private property with centered at 21º42'31''S, 43º21'26'', alt. 795m, with red-yellow oxisol, 8.5 pH, and Cwa climate. We performed monthly collections in a ecosystem with <em>Pennisetum purpureum</em>, <em>Brachiaria mutica</em>, <em>Paspalum notatum</em>, <em>Bidens pilosa</em>, <em>Leucena leucocephala</em>, and <em>Ricinus communis</em> plants near a river flow in the 2008/Sep - 2009/Aug timespan. There, we defined an equally spaced transect of 200m with ten collection points and gathered 50 x 50 cm, 500 g litter-falls. Samples were sieved by 2.0 mm meshs, and living specimens were cleaned and fixed in a Railliet-Henry liquid, their shells removed, dried, and separated. Finally, we label the species and create the Helix dataset. We measured each shell <em>Height</em>, <em>Diameter</em>, <em>Spire height</em>, and <em>Aperture width</em> and <em>height</em> with a pachymeter. The dataset includes 518 instances labeled as <em><strong>Beckianum beckianum</strong></em> (28.8%), <em><strong>Dysopeas muibum</strong></em> (21.2%), <em><strong>Allopeas gracilis</strong></em> (9.7%), <em><strong>Leptinaria unilamellata </strong></em>(12%), and <em><strong>Subulina octona</strong></em> (28.3%).