What are Nautiloids?

Nautilus (scientific name: Nautiloidea): It is a general name for marine molluscs of the cephalopods and nautilus family. There are 2 genera and 6 species, with a curled pearl-like shell. The shell consists of many chambers. The shell is located in the shell. Each chamber is separated by a septum; 2 pairs of gills; 63-94 wrists, but no suction cups; simple eyes, no lens; no ink sac. The shell is thin and light, spirally coiled, the surface of the shell is white or milky white, the growth lines radiate from the umbilical part of the shell, smooth and dense, mostly reddish-brown. The entire spiral-shaped shell is as smooth as a disk and looks like a parrot's mouth, hence the name "nautilus".

Nautilus basically belongs to
Nautilus is usually active at night, and during the day it rests on the ocean floor, holding it on the rock by the tentacles. Living in the surface of the ocean all the way to the depth of 600 meters, the amount of gas must be able to be adjusted to make the nautilus adapt to the pressure of different depths. Nautilus is a carnivorous animal whose food is mainly small fish, molluscs, benthic
Nautilus hermaphroditic, oviparous. During mating, the male and female heads are opposite, with the ventral side facing up, and the tentacles are crossed. The male attaches sperm pods to the tentacles behind the female funnel with the flesh on the ventral surface. She lays eggs shortly after fertilization. Female nautilus lays eggs once a year. Generally, the eggs are laid on shallow rocks and only a few to tens of eggs are produced, but the eggs are larger, 40 × 10 mm. The incubation period is 12 months. The newly hatched nautilus is generally about 3 cm in length. [4]
Nautilidae (2 genera, 6 species)
Chinese name
scientific name
Namers and Ages
One
Heteronautilus
Allonautilus
Ward & Saunders, 1997
1
Included in "
Nautilus Cup [10]
Since ancient times, Nautilus has given people heartfelt praise for its dazzling beauty. The parrot cup unearthed from the tomb of the couple of Wang Xing in Nanjing, Eastern Jin Dynasty, China. The shell is a rare shellfish nautilus shell. The outer side of the shell is set with copper edges. The two sides are equipped with copper ears. It can store wine, has a delicate design and a unique shape. It is the only piece of archeology in the Six Dynasties. [10]
Nautilus cups are rare in unearthed artifacts, but not uncommon in ancient poems. In Li Bai's "Xiangyang Song", there are verses such as " , parrot cup, 36,000 days a century, 300 cups a day".
Around the world, there are many products made using the name or principle of nautilus, such as audio, software, sofas, toys, wineware, hotels, etc. Many artists also get inspiration from nautilus and create art such as painting, sculpture, and architecture Product. In China's shell market, nautilus shells are not uncommon. Almost every tourist spot on the coast sells them. Many vendors list nautilus as China's "four famous snails." Nautilus is also a well-deserved "art "It's beautiful patterns and unique forms, plus legendary living conditions, are indeed very good collectibles. This is how many creatures disappear from the natural world and witness the evolution of ecology in human closets or museums. . [5]
Note: Nautilus fossil atlas web site [11] ; Nautilus pictures and atlas web site [12] ; Nautilus shell pictures and atlas web site [13] ; Nautilus stamp atlas web site [14]

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