Georissa purchasi

Georissa purchasi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Neritimorpha
Order:	Cycloneritida
Family:	Hydrocenidae
Genus:	Georissa
Species:	G. purchasi
Binomial name
	Georissa purchasi;
Synonyms
	Hydrocena purchasi Pfeiffer, 1862Omphalorissa purchasi(Pfeiffer, 1862)Contents Description ; Distribution ; Habitat ; References ; Further reading ;

Last updated February 25, 2023

Georissa purchasi is a species of small land snail, a terrestrial gastropod mollusc in the family Hydrocenidae.

The type specimen is stored in the Imperial Natural History Museum, Vienna.^[1]

Description

The shell is minute, globosely conical, translucid, imperforate (no umbilicus. The sculpture consists of very fine growth-striae only. The colour is horny-fuscous. The epidermis is thin and shiny. The spire is conical, and rather obtuse. The protoconch is minute, strongly convex, smooth. The shell has 4-5 convex whorls.^[1] The last whorl is slightly greater than one-third of the height of the shell. The base is convex. The suture is impressed. The aperture is a little oblique, subcircular. The peristome is simple, straight. The columella is slightly concave, white. The inner lip is spread over the umbilicus, sealing it up more or less completely. The callus on the penultimate whorl unites the margins, and is conspicuous.^[1]

The width of the shell is 1 mm. The height of the shell is 2 mm.^[1]

The radula was described by Suter.^{[ when? ]}^[2]

Distribution

Georissa purchasi is found in New Zealand.

North Island: Bay of Islands (Purchas, Hochstetter); Waro; Whangarei; vicinity of Auckland; Wairangi, Waikato Hunua Range; Mount Pirongia; Forty-mile Bush.^[1]
South Island: Kenepuru Sound; Nelson; Wairoa Gorge; Greymouth; Riccarton Bush, near Christchurch.^[1]

Habitat

This species is found in native bush in very moist situations, near creeks or swamps, under stones, rotten wood, etc.^[1]

Related Research Articles

<i>Coelotrochus oppressus</i> Species of gastropod

Coelotrochus oppressus, common name the shouldered top shell, is a species of very small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails or top shells.

<i>Coelotrochus chathamensis</i> Species of gastropod

Coelotrochus chathamensis is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails or top shells.

<i>Diloma coracinum</i> Species of gastropod

Diloma coracinum is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails. The Māori name is māihi.

<i>Trochus camelophorus</i> Species of sea snail

Trochus camelophorus is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails.

Lodderia eumorpha is a species of minute sea snail or micromollusc, a marine gastropod mollusc in the family Skeneidae.

<i>Liotella rotula</i> Species of gastropod

Liotella rotula is a species of minute sea snail, a marine gastropod mollusc in the family Skeneidae.

Zalipais lissa is a species of minute sea snail, a marine gastropod mollusc in the family Skeneidae.

<i>Cantharidus capillaceus</i> Species of gastropod

Cantharidus capillaceus is a species of sea snail, a marine gastropod mollusc in the family Trochidae, the top snails.

Cirsonella densilirata is a minute sea snail, a marine gastropod mollusc in the family Skeneidae.

<i>Micrelenchus sanguineus</i> Species of gastropod

Micrelenchus sanguineus is a species of small sea snail, a marine gastropod mollusc in the family Trochidae, the top shells.

Munditia serrata is a minute sea snail, a marine gastropod mollusc in the family Liotiidae.

Radiodiscus patagonicus is a minute species of air-breathing land snail, a terrestrial gastropod mollusk or micromollusk in the family Charopidae.

Zenepos totolirata is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

Cantharidus antipodum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

Roseaplagis artizona is a species of sea snail in the family Trochidae, the top snails.

Cantharidus dilatatus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

<i>Coelotrochus carmesinus</i> Species of gastropod

Coelotrochus carmesinus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

Coelotrochus viridis, common name the green top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.

<i>Spectamen semireticulatum</i> Species of gastropod

Spectamen semireticulatum is a species of sea snail, a marine gastropod mollusc in the family Solariellidae.

<i>Neoguraleus amoenus</i> Species of gastropod

Neoguraleus amoenus is a species of sea snail, a marine gastropod mollusc in the family Mangeliidae.

References

This article incorporates public domain text from the reference.^[1]

1 2 3 4 5 6 7 8 Suter H. (1913). Manual of the New Zealand Mollusca. Wellington, 1120 pp. page 175-176.
↑ Suter H. (????). T.N.Z.I., xxiv, 301, pi. 23, f. 58.