Species Profile and Threats Database

For information to assist proponents in referral, environmental assessments and compliance issues, refer to the Policy Statements and Guidelines (where available), the Conservation Advice (where available) or the Listing Advice (where available).
In addition, proponents and land managers should refer to the Recovery Plan (where available) or the Conservation Advice (where available) for recovery, mitigation and conservation information.

EPBC Act Listing Status Listed as Extinct as Trichomanes exiguum
Adopted/Made Recovery Plans
Federal Register of
    Legislative Instruments
Declaration under s178, s181, and s183 of the Environment Protection and Biodiversity Conservation Act 1999 - List of threatened species, List of threatened ecological communities and List of threatening processes (Commonwealth of Australia, 2000) [Legislative Instrument] as Didymoglossum exiguum.
Amendment to the list of threatened species under section 178 of the Environment Protection and Biodiversity Conservation Act 1999 (11/04/2007) (Commonwealth of Australia, 2007f) [Legislative Instrument] as Trichomanes exiguum.
State Listing Status
QLD: Listed as Extinct in the wild (Nature Conservation Act 1992 (Queensland): May 2014 list) as Didymoglossum exiguum
Scientific name Didymoglossum exiguum [24118]
Family Hymenophyllaceae:Hymenophyllales:Polypodiatae:Polypodiophyta:Plantae
Species author (Bedd.) Copel.
Infraspecies author  
Reference Copeland, E.B., (1938) Genera Hymenophyllacearum. The Philippine Journal of Science 67: 78 [comb. nov.]
Other names Trichomanes paradoxum [45495]
Trichomanes exiguum [67192]
Distribution map Species Distribution Map not available for this taxon.
Illustrations Google Images

Scientific name: Trichomanes exiguum

Trichomanes exiguum was either an epiphytic (growing on another living plant) or lithophyte (growing on or amongst rocks) fern. The rhizomes (horizontal stems) possessed velvety hairs. The leaves (fronds) of Trichomanes exiguum were 5–10 mm long. The leaf surface of sterile fronds was round to ovate and approximately 4 mm wide; the margins slightly irregular and bearing star-shaped hairs. The leaf surface of fertile fronds was narrowly wedge-shaped at the base, but otherwise similar in shape to the sterile leaf surface. The leaf stems were short with long hairs at the base. Each frond contained one spore capsule (Bostock & Spokes 1998).

Trichomanes exiguum occurred in the Bellenden Ker Range, north-eastern Queensland. The species was recorded only once in Australia (Bostock & Spokes 1998).

Trichlomades exiguum is also known from southern India, Sri Lanka, and from Thailand to the Malay Peninsula (Bostock & Spokes 1998).

Trichomanes exiguum grew on the bark of trees or wet rocks in tropical rainforest (Bostock & Spokes 1998).

As a member of the fern family, Trichomanes exiguum did not possess flowers and reproduced by means of spores.

The reasons for the extinction of Trichomanes exiguum were not recorded.

The following table lists known and perceived threats to this species. Threats are based on the International Union for Conservation of Nature and Natural Resources (IUCN) threat classification version 1.1.

Threat Class Threatening Species References
Uncategorised:Uncategorised:threats not specified Trichomanes exiguumin Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage, 2006zh) [Internet].

Bostock, P.D. & M. Spokes (1998). Hymenophyllaceae: Didymoglossum exiguum. In: McCarthy, P.M & A.E Orchard, eds. Flora of Australia. 48:120. Melbourne, Victoria: CSIRO Publishing.

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This database is designed to provide statutory, biological and ecological information on species and ecological communities, migratory species, marine species, and species and species products subject to international trade and commercial use protected under the Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act). It has been compiled from a range of sources including listing advice, recovery plans, published literature and individual experts. While reasonable efforts have been made to ensure the accuracy of the information, no guarantee is given, nor responsibility taken, by the Commonwealth for its accuracy, currency or completeness. The Commonwealth does not accept any responsibility for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the information contained in this database. The information contained in this database does not necessarily represent the views of the Commonwealth. This database is not intended to be a complete source of information on the matters it deals with. Individuals and organisations should consider all the available information, including that available from other sources, in deciding whether there is a need to make a referral or apply for a permit or exemption under the EPBC Act.

Citation: Department of the Environment (2014). Didymoglossum exiguum in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: Accessed Thu, 18 Sep 2014 02:14:12 +1000.