| Nautilus vanuatuensis | |
|---|---|
 | |
| Nautilus vanuatensis in the wild | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | Nautilida |
| Family: | Nautilidae |
| Genus: | Nautilus |
| Species: | N. vanuatuensis |
| Binomial name | |
| Nautilus vanuatuensis Barord et al., 2023 | |
Nautilus vanuatuensis is a species of nautilus native to the waters of Vanuatu. It was described as a separate species in 2023. [1] [2]
It is distinguished from other nautilus species by its abundantly colored red shell. It has 40-50% shell coloration (more than any other Nautilus species with a plugged umbilicus) and its pigmentation occurs in stripes extending from venter to umbilicus. [1]
Nautilus vanuatuensis primarily lives in deep waters (200-400 m) although it is commonly observed in shallow waters (5 m). It seems endemic to Vanuatu, where it is apparently the only species. [1]
The specific epithet, vanuatuensis, refers to Vanuatu, the type locality.
The nautilus is an ancient pelagic marine mollusc of the cephalopod family Nautilidae. The nautilus is the sole extant family of the superfamily Nautilaceae and of its smaller but near equal suborder, Nautilina.
The chambered nautilus, also called the pearly nautilus, is the best-known species of nautilus. The shell, when cut away, reveals a lining of lustrous nacre and displays a nearly perfect equiangular spiral, although it is not a golden spiral. The shell exhibits countershading, being light on the bottom and dark on top. This is to help avoid predators, because when seen from above, it blends in with the darkness of the sea, and when seen from below, it blends in with the light coming from above.
Argonauta nouryi, also known as Noury's argonaut, is a species of pelagic octopus. The female of the species, like all argonauts, creates a paper-thin eggcase that coils around the octopus much like the way a nautilus lives in its shell. The shell is usually approximately 80 mm in length, although it can exceed 90 mm in exceptional specimens; the world record size is 95.5 mm.
Nautilus macromphalus, the bellybutton nautilus, is a species of nautilus native to the waters off New Caledonia, the Loyalty Islands, and northeastern Australia. The shell of this species lacks a callus, leaving the umbilicus exposed, in which the inner coils of the shell are visible. This opening constitutes about 15% of the shell diameter at its widest point.
Nautilus is a genus of cephalopods in the family Nautilidae. Species in this genus differ significantly in terms of morphology from those placed in the sister taxon Allonautilus. The oldest fossils of the genus are known from the Late Eocene Hoko River Formation, in Washington State and from Late-Eocene to Early Oligocene sediments in Kazakhstan. The oldest fossils of the modern species Nautilus pompilius are from Early Pleistocene sediments off the coast of Luzon in the Philippines.
Nautilus stenomphalus, also known as the white-patch nautilus, is a species of nautilus native to the Great Barrier Reef. N. stenomphalus is very similar to N. pompilius and may in fact represent a subspecies. It is separated by the absence of a thickened callus and the presence of white patches in the umbilical and shoulder regions of the shell. The sheaths of this species have scalloped edges compared with the smooth sheaths of N. pompilius. N. stenomphalus also differs slightly in hood ornamentation. The shell is usually up to around 180 mm in diameter, although the largest specimen ever recorded measured 201 mm.
Allonautilus scrobiculatus, also known as the crusty nautilus or fuzzy nautilus, is a species of nautilus native to the waters around New Guinea, specifically New Britain and Milne Bay, and the Solomon Islands. A. scrobiculatus is recognizable by the large open umbilicus, which is around 20% of the shell diameter at its widest point. This species, along with the closely related A. perforatus, were originally placed in the genus Nautilus, but have recently been given their own genus on account of significant morphological differences. The most obvious are features of the shell, including crease and an encrusting layer (periostracum) that covers most of the shell. Gills and reproductive structures also differ significantly from members of the genus Nautilus. The shell is usually up to around 18 cm in diameter, although the largest specimen ever recorded measured 21.5 cm. The species was thought to have gone extinct after 1986, but was rediscovered in July 2015.
The umbilicus of a shell is the axially aligned, hollow cone-shaped space within the whorls of a coiled mollusc shell. The term umbilicus is often used in descriptions of gastropod shells, i.e. it is a feature present on the ventral side of many snail shells, including some species of sea snails, land snails, and freshwater snails.
Calliotropis infundibulum is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.
Lamellitrochus lamellosus is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.
Solariella varicosa, common name the varicose solarielle, is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.
Calliostoma marionae, common name Marion's top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Distorsio habei is a species of medium-sized sea snail, a marine gastropod mollusk in the family Personidae, the Distortio snails.
Distorsio kurzi, common name Kurz's distorsio, is a species of medium-sized sea snail, a marine gastropod mollusk in the family Personidae, the Distortio snails.
Megastraea undosa, common name the wavy turban snail, is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails. This species is native to the coast of California.
Solariella triplostephanus is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.
Jerimalai is a limestone cave southeast of Tutuala, on the eastern tip of East Timor. Fish remains and fish hooks excavated in Jerimalai provide evidence for advanced fishing technique by inhabitants of Timor 42,000 years ago.
Nautilus samoaensis is a species of nautilus native to the waters of American Samoa. It was described as a separate species in 2023.
Nautilus vitiensis is a species of nautilus native to the waters of Fiji. It was described as a separate species in 2023.
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