Yellow-shelled semi-slug (Parmarion martensi)

Janggel or yellow-shelled semi-slug (Parmarion martensi) is an animal species in Ariophantidae, semi-naked snails or has an internal shell which is very small, nocturnal but sometimes performs activities in the morning when the environment is wet, very moist and foggy.

P. martensi has a pair of antennas, a small and reduced shell wrapped in a mantle to form a bulge in the upper back to cover the head to half the body. The shell is brownish yellow, transparent, thin, shiny and shaped like a nail.

Yellow-shelled semi-slug has a length of 3-5 cm, yellowish brown or grayish brown or dark brown on the back. Two black parallel lines that extend from the base of the antenna on the head to the back of the body.

Janggel is found in andosol soils in mountainous and highland areas, tropical at an altitude of 750-3,000 m, pH 7, temperature 11-25C, humidity 80% and rainfall 2,500-7,000 mm/year.

P. martensi is often seen clustered with activities not far apart because of slow locomotion and move in a place not too far away. The eggs are often placed in groups with 10-15 eggs per group.

This species moves while secreting phlegm that is toxic to plants. They eat dead and living organic material including leaves, stems, flowers, fruit and other parts of plants that cause holes by bite marks on the surface. Sometimes it also takes root and shoots.

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Infraclass: Euthyneura
Subterclass: Tectipleura
Superorder: Eupulmonata
Order: Stylommatophora
Suborder: Helicina
Infraorder: Limacoidei
Superfamily: Helicarionoidea
Family: Ariophantidae
Genus: Parmarion
Species: Parmarion martensi

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