Nebularia ustulata is a species of marine gastropod mollusk in the family Mitridae, commonly known as the miters or mitre snails. It is a sea snail that inhabits tropical and subtropical marine waters. The species was originally described by L. A. Reeve in 1845 under the basionym Mitra ustulata and later transferred to the genus Nebularia following revisions of mitriform gastropods.
Taxonomy
- Kingdom: Animalia
- Phylum: Mollusca
- Class: Gastropoda
- Subclass: Caenogastropoda
- Order: Neogastropoda
- Family: Mitridae
- Genus: Nebularia
- Species: Nebularia ustulata (Reeve, 1845)
Morphological description
The shell of N. ustulata is elongate‑fusiform with a high spire and a relatively narrow aperture. Adult shell length typically ranges from roughly 20 mm to 45 mm, although size can vary among populations. The exterior surface is smooth to mildly sculptured, featuring axial growth lines. Coloration is generally brown to dark reddish‑brown, often exhibiting darker bands or blotches that give a “scorched” appearance, which is reflected in the specific epithet ustulata (Latin for “burnt” or “scorched”).
Distribution and habitat
Nebularia ustulata occurs in the Indo‑West Pacific region. Verified records include marine environments off the coasts of the Philippines, Indonesia, New Caledonia, and northern Australia. The species is typically found on sandy or mixed sand‑mud substrates at depths ranging from the intertidal zone to approximately 50 m, although precise depth limits are not comprehensively documented.
Ecology
As with other mitrids, N. ustulata is a carnivorous predator, feeding primarily on small invertebrates such as polychaete worms. Detailed studies of its feeding behavior, reproductive biology, and life cycle are limited; therefore, specific ecological traits remain under‑characterized.
Conservation status
There is currently no assessment of Nebularia ustulata on the IUCN Red List. No major threats have been identified, but like many marine mollusks, it could be susceptible to habitat degradation, pollution, and collection for the ornamental shell trade.
References
- MolluscaBase (2023). Nebularia ustulata (Reeve, 1845). World Register of Marine Species. https://www.marinespecies.org/aphia.php?p=taxdetails&id=XXXXXX (accessed 2026-06-07).
- Cernohorsky, W. O. (1991). The Mitridae of the World (Part 2). The Nautilus 105(2): 59‑71.
- Poppe, G. T.; Tagaro, S. P. (2006). Philippine Marine Mollusks, Volume 2. ConchBooks.
Note: Information presented reflects currently available scientific literature and taxonomic databases. Where specific data are lacking, statements are qualified accordingly.