Paralaoma

Paralaoma allochroida, copyright Karin Mahlfeld, David Roscoe, Frank Climo.

Belongs within: Punctoidea.

Paralaoma is an Australasian genus of very small snails with a coarse radial sculpture and wide umbilicus on the shell (Stanisic et al. 2010).

Characters (from Stanisic et al. 2010): Shell minute to very small, depressedly turbinate to trochoidal with low to high dome-shaped spire; whorls rounded to shouldered; protoconch with cord-like spiral lirae; teleoconch sculpture of closely to widely spaced radial ribs and growth lines overlying finer spiral threads; umbilicus wide to narrow. Colour waxy brown.

Paralaoma Iredale 1913 [Paralaomidae] SS10
    |--*P. raoulensis Iredale 1913 SS10
    |--P. allochroida (Suter 1890) P61
    |--P. annabelli Shea & Griffiths in Stanisic, Shea et al. 2010 SS10
    |--P. buddlei Powell 1951 P61
    |--P. caputspinulae (Reeve 1851) SS10 (see below for synonymy)
    |--P. gelida Iredale 1941 SS10
    |--P. hannai BP90
    |--P. lateumbilicata (Suter 1890) P61
    |--P. pumila (Hutton 1883) P61
    |--P. raricostata (Suter 1890) P61
    |--P. regia Powell 1948 P61
    |--P. retinodes (Tate 1894) [=Charopa retinodes, Flammulina retinodes] S88
    |--P. sericata (Suter 1890) P61
    |--P. sinecosta Iredale 1941 (n. d.) SS10
    `--P. turbotti Powell 1948 P61

Paralaoma caputspinulae (Reeve 1851) SS10 [incl. Helix arenicola Tate 1878 SS10, H. hortensis var. arenicola G79, H. (Discus) derelicta Legrand 1871 SS10, Paralaoma decresensis Iredale 1937 SS10, H. discors Petterd 1902 SS10, P. duncombei Iredale 1945 SS10, H. hobarti Cox 1868 SS10, H. morti Cox 1864 SS10, H. paradoxa Cox 1864 non Born 1780 SS10, Paralaoma royi Iredale 1944 SS10, H. similis Cox 1868 SS10, H. (Discus) sitiens Legrand 1871 SS10, Paralaoma stabilis Iredale 1937 SS10, H. (Patula) stellata Brazier 1871 SS10]

*Type species of generic name indicated

REFERENCES

[BP90] Burch, J. B., & T. A. Pearce. 1990. Terrestrial Gastropoda. In: Dindal, D. L. (ed.) Soil Biology Guide pp. 201–309. John Wiley & Sones: New York.

[G79] Gibbons, J. S. 1879. Helix hortensis var. arenicola. Journal of Conchology 2: 264.

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4^th ed. Whitcombe and Tombs Limited: Christchurch.

[S88] Solem, A. 1988. Non-camaenid land snails of the Kimberley and Northern Territory, Australia. I. Systematics, affinities and ranges. Invertebrate Taxonomy 4: 455–604.

[SS10] Stanisic, J., M. Shea, D. Potter & O. Griffiths. 2010. Australian Land Snails vol. 1. A. field guide to eastern Australian species. Bioculture Press: Mauritius.