One Muffin Land Snail measuring 2 1/2 to 3 inches ****

One Muffin Land Snail measuring 2 1/2 to 3 inches.

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Ryssota ovum, common name, the polished muffin, is a species of large air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicarionidae. It is endemic to the Philippines, where it is known locally as bayuku or bayoko. It is edible and is considered a delicacy.

Ryssota ovum is endemic to the Philippines, mainly in Luzon and in the island of Panay.

Ryssota ovum can normally be found underneath forest leaves and branches at the buttresses of tree. This species depends on moisture for survival. So it is abundant during the rainy season, while in the dry season it is present only in damp areas or in cool places.

The Ryssota ovum species is the largest land snail found in the Philippines. Its shells can attain diameters ranging from 2.8 to 3.9 inches. The color of these substantial shells varies from pale brown to maroon, often featuring a brighter apex. They have a wide aperture, with an interior that may appear white or bluish-white.

The Ryssota ovum is a nocturnal species. With the onset of darkness, these terrestrial snails become active and feed on decomposing forest matter. As dawn breaks, they retreat and conceal themselves within the forest detritus. Their natural camouflage allows them to blend seamlessly into the soil at the base of trees, amidst roots, decayed branches, fallen leaves, and weathered rocks.

Scientific classification

Kingdom: Animalia

Phylum: Mollusca

Class: Gastropoda

(unranked): clade Heterobranchia

clade Euthyneura

clade Panpulmonata

clade Eupulmonata

clade Stylommatophora

informal group Sigmurethra

clade limacoid clade

Superfamily: Helicarionoidea

Family: Helicarionidae

Genus: Ryssota

Species: R. ovum

Binomial name: Ryssota ovum

(Valenciennes, 1854)

(REF: "Species Ryssota ovum - Hierarchy - The Taxonomicon". taxonomicon.taxonomy.nl.)(REF: Jimson S. Solatre A promising component in Philippine agroforestry: a land snail called bayuku (Ryssota ovum)(REF: "WMSD - Worldwide mollusc species DB - Ryssota otaheitana". www.bagniliggia.it.)(REF: Paul Bartsch: A Synopsis of the Philippine Land Mollusks of the Subgenus Ryssota. In: Proceedings of the Biological Society of Washington Vol. 51,)