Papuina trochiformis

Papuina trochiformis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae.[1]

Papuina trochiformis
Original image of a shell of Papuina trochiformis
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Superfamily:
Helicoidea
Family:
Camaenidae
Subfamily:
Camaeninae
Genus:
Papuina
Species:
P. trochiformis
Binomial name
Papuina trochiformis
H.B. Preston, 1903

Distribution

The type locality for this species is described as Mafor Island, New Guinea.

Shell description

The height of the shell attains 19 mm, its maximum diameter is 23 mm, minimum diameter 19 mm; aperture: diameter 9 mm, height 9 mm.

(Original description) The conical shell has an acute spire. It contains 5-6 whorls The last is sharply keeled, the upper whorls show a much greater convexity in proportion than the last two. The suture is shallow. The aperture is oblique, having a distinct callosity, presenting a somewhat heliciniform appearance, The peristome is expanded and reflexed. The columella is stout, with a protuberance at its base. The umbilicus is very narrow, partly concealed by reflexion of the lip. The shell is striated with somewhat coarse growth lines, otherwise it is destitute of sculpture. The colourof the shell is pale whitish yellow, deepening on earlier whorls.[1]

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References
  1. H. B. Preston, New species of land shells from New Guinea; Proceedings of the Malacological Society of London vol. V, 1902-1903
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