Document ID: chunk:federal_register_of_legislation:F2025L00287:reg:3:p122
Version: federal_register_of_legislation:F2025L00287
Segment Type: reg
Provision Reference: reg 3 (pt 122/276)
Character Range: 489058–492217

national park               At least three viable populations maintained on Norfolk Island
                                                    10% outside the park and reserves

Relevant literature
DEWHA (Department of the Environment, Water, Heritage and the Arts) (2008a) Approved Conservation Advice for Advena campbellii campbellii.  Department of the Environment, Water, Heritage and the Arts, Canberra.
Hyman I & Köhler F (2020) Report on survey of land snails on Norfolk Island. Australian Museum, Sydney.
Hyman I (2005) Taxonomy, systematic, and evolutionary trends in Helicarionida (Mollusca, Pulmonata). PhD Thesis, University of Sydney.
Hyman IT, Caiza J & Köhler F (2023) Systematic revision of the microcystid land snails endemic to Norfolk Island (Gastropoda: Stylommatophora) based on comparative morpho-anatomy and mitochondrial phylogenetics. Invertebrate Systematics 37(5–6), 334–443.
Iredale T (1945) The land mollusca of Norfolk Island. Australian Zoologist 11, 46–71.
IUCN (2020) 2020 IUCN Red List of Threatened Species. Accessed 23 January 2024.
Neuweger D, White P & Ponder WF (2001) Land snails from Norfolk Island sites. Records of the Australian Museum Supplement 27, 115–122.
Ponder WF (1997) Conservation status, threats and habitat requirements of Australian terrestrial and freshwater mollusca. Memoirs of the Museum of Victoria 56, 421–430.
Smith BJ (1992) Non-marine Mollusca, in WWK Houston (ed) Zoological Catalogue of Australia Volume 8. Australian Government Publishing Service, Canberra.
Varman RVJP (1991) Conchological Survey 1983-90: Manuscript of Land Mollusca Fossiliferous and Present Day. Unpublished manuscript.

Advena grayi—Gray's glass-snail

Conservation significance
Endemic to the Norfolk Island Group.
EPBC Act Listing Status: Critically Endangered (listed as Mathewsoconcha grayi ms).
Approved Conservation Advice: 19/12/2008 (DEWHA 2008b).

Description
This species has a similar shell to Advena suteri but the spire is slightly higher and the shell distinctly larger and more inflated. Typical specimen is 15 mm in diameter and 11 mm in height (Hyman 2005). There is no peripheral band.

Distribution
Fossils of this species were found on Nepean Island, and it was common in sub-fossil deposits on Norfolk Island but was not located in native forests during surveys between 1983 and 1990 (Varman 1991). The only previous non-fossil material for this species came from two specimens collected on Phillip Island in 1982 (TSSC 2009b).
The species was thought to be extinct on both Norfolk Island and Phillip Island but was recently rediscovered surviving in flax on slopes on Phillip Island. Based on a survey in March 2023, the estimated (conservative approximated) population size is 5,000, with one population over an area of 0.93ha. The population may be very weather dependant and go through boom-and-bust cycles.
The distribution is shown in Map 14.

Ecology
Live-bearing.

Habitat
Litter and woodland (Smith 1992).

Threats
Major threats include habitat loss, fragmentation and degradation by land clearing and stock grazing, as well as the introduction of feral animals (notably rats) and invasive