Chestnut Latirus (also known as the Brown-lined Latirus)
Phylum: Mollusca, Class: Gastropoda, Order: Neogastropoda, Family: Fasciolariidae, Genus: Pustulatirus, Species: Pustulatirus varians · Fasciolariidae (Tulip and Horse Conch family) · Gastropod (univalve); Spiral/Fusiform whole shell
Species
Pustulatirus varians (formerly Latirus varians)
Shell Type
Gastropod (univalve); Spiral/Fusiform whole shell
Family
Fasciolariidae (Tulip and Horse Conch family)
Size
Approximately 0.75 to 1 inch (19-25mm) in length. This is a mature specimen on the smaller side of the typical adult range which can reach up to 1.5 inches.
Color & Pattern
Features a rich chestnut to dark brown base color with distinctive cream-colored or white spiral bands. The sculptural nodes are darker brown. The pattern consists of alternating dark brown and lighter cream horizontal bands following the spiral whorls.
Rarity
Common in its natural range, but because of its small size and tendency to hide in crevices, it is more frequently found by divers or snorkelers than casual beachcombers.
Habitat
Typically found in shallow tropical waters, intertidal and subtidal zones. Prefers rocky substrates, coral reefs, and under coral rubble where it can hide.
Geographic Range
Western Atlantic region, ranging from Southeast Florida and the Florida Keys through the Bahamas, the Caribbean Sea, and south to Brazil.
Description
An attractive, solid fusiform shell with a moderately high spire. The surface is heavily sculpted with strong axial ribs and crossed by spiral cords, creating a bumpy or 'pustulate' texture. It has a well-defined siphonal canal and a relatively small, oval aperture with a thickened outer lip.
Key Features
Distinguished by its 'beaded' or bumpy spiral sculpture and the high-contrast white bands against a dark chestnut background. It typically has 2-3 prominent white bands on the body whorl.
Collector Value
Low to Moderate ($2 - $10 USD). While common, its attractive patterns make it a staple for regional Caribbean collections. Value increases for 'Gem' quality specimens with a perfectly preserved apex.
Condition Notes
The specimen appears to be in 'Good' to 'Fine' condition. The apex (tip) shows some slight erosion, but the color contrast is still vivid and the sculptural nodes are well-defined. There are no visible boring holes or major breaks in the lip.
Interesting Facts
The animals inside these shells are predatory carnivores, often feeding on other small mollusks or worms. Members of this family are known as 'Spindle Shells' due to their elongated, tapered shapes.
Ecological Role
Active predator in the reef ecosystem, helping to control populations of small invertebrates. It is sensitive to water quality and reef health; not currently listed as endangered.
Similar Species
Can be confused with Leucozonia nassa (Chevron Latirus), which is generally larger and has a different banding structure, or small specimens of Hesperisternia multangulus (Ribbed Cantharus).
Beach Finding Tips
Look in 'shell hash' piles near rocky outcroppings or jetties in the Florida Keys or Bahamas. They are best found after storms that dislodge them from reef crevices, especially during low spring tides.