Melo amphora

Diadem volute
Moving across the sand at low tide
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda
Superfamily:	Muricoidea
Family:	Volutidae
Genus:	Melo
Species:	M. amphora
Binomial name
Melo amphora (Lightfoot, 1786)
Synonyms
Voluta diadema Lamarck, 1816

A shell of Melo amphora.

Melo amphora, common name the Diadem volute, is a very large sea snail, a marine gastropod mollusc in the family Volutidae, the volutes.

Etymology

The specific name amphora is the Latin word for vase, derived from the Greek amphoreus (αμφορεύς).

Distribution

This species distribution is restricted to the tropical southwest Pacific, from southern Indonesia and New Guinea to the northern half of Australia.^[1]

Habitat

This large sea snail is known to live in littoral and shallow sublittoral zones. It usually dwells in muddy bottoms at a maximum depth of nearly 10 m.^[1]

Shell description

The maximum shell length of this species is up to 500 mm, usually around 300 mm.^[1]

This large shell has a bulbous or nearly oval outline. Its columella has three easily distinguishable oblique folds. The aperture is wide and near as long as the shell itself, and there is no operculum. It has a very large, inflated and posteriorly expanded body whorl. One of its most striking characteristiscs is the shoulder with proeminent and curved hollow spines. These spines tend to become obsolete in later stages of growth.^[1] The spire is usually very short.

The color of the Melo amphora shell is said to be highly variable. It is commonly mainly coloured brown, white, or pale orange. It usually presents spiral darker brown banding. The interior is glazed, and is commonly coloured cream or pinky orange.^[1]

Life habits

Video: Giant Baler moving across reef at low tide

Feeding

Melo amphora is known to be carnivorous. It is usually seen feeding on other volutes, like Zebramoria zebra^[2], and may present cannibalistic behaviour, commonly feeding on smaller conspecific individuals.^[3]

Human use

This species flesh is edible, and commonly used as food by native fisherman. The size and ornamentation of the Melo amphora shell makes it highly regarded as a decorative item. It is also known to be used as a water carrier, and as a bailer for fishing boats (like other species from the Melo genus).^[1]

References

1. ^ ^{a b c d e f} Poutiers, J. M. (1998). Gastropods in: FAO Species Identification Guide for Fishery Purposes: The living marine resources of the Western Central Pacific Volume 1. Seaweeds, corals, bivalves and gastropods. Rome, FAO, 1998. page 597.
2. ^ Wilson, B.R. and Gillett, K. (1971). Australian Shells. A & H. Reed, Sydney.
3. ^ F. E. Wells, D. I. Walker and D. S. Jones (eds.) (2003). The Marine Flora and Fauna of Dampier, Western Australia. Western Australian Museum, Perth.

• Photos at [1]