Cuttlebone - Wikipedia
Cuttlebone, also known as cuttlefish bone, is a hard, brittle internal structure (an internal shell) found in all members of the family Sepiidae, commonly known as cuttlefish, within the cephalopods. In other cephalopod families it is called a gladius .
Cephalopod beak - Wikipedia
All extant cephalopods have a two-part beak, or rostrum, situated in the buccal mass and surrounded by the muscular head appendages. The dorsal (upper) mandible fits into the ventral (lower) mandible and together they function in a scissor-like fashion.
Cephalopod - Wikipedia
A cephalopod / ˈsɛfələpɒd / is any member of the molluscan class Cephalopoda / sɛfəˈlɒpədə / (Greek plural κεφαλόποδες, kephalópodes; "head-feet") [2] such as a squid, octopus, cuttlefish, or nautilus.
头足纲 - 维基百科，自由的百科全书
头足纲 （学名： Cephalopoda）是 软体动物 的一个 纲， 化石 记录在一万种以上， 现生 仅存786种。. 頭足綱分布在所有海域的所有深度，目前沒有發現適應 淡水 的種類，但有些 物种 能夠適應不同 鹽度 的水。. 頭足綱可分為兩個到四個 亞綱，其中現存兩個亞綱 ...
Evolution of limb development in cephalopod mollusks | eLife
Jun 18, 2019 · Cephalopod mollusks evolved numerous anatomical novelties, including arms and tentacles, but little is known about the developmental mechanisms underlying cephalopod limb evolution. Here we show that all three axes of cuttlefish limbs are patterned by the same signaling networks that act in vertebrates and arthropods, although they evolved ...
Cephalopods | Smithsonian Ocean
The cephalopods are a diverse class of mollusks (a group that also includes snails and bivalves) that emerged during an explosion of animal diversity in the oceans during the Cambrian period, over 500 million years ago (mya). Today, scientists divide the living cephalopods into three groups, called superorders.
The cuttlefish Sepia officinalis (Sepiidae, Cephalopoda) constructs ...
Jun 18, 2015 · The cuttlebone of the European common cuttlefish Sepia officinalis Linnaeus, 1758 is an intricate structure composed of a dorsal shield and ventrally placed chamber complex. It is composed of...
Cephalopod Anatomy - SpringerLink
May 6, 2021 · In this chapter we will look at how the anatomy of cephalopods is organized, bearing in mind that in many instances the details vary from one species to another. Like humans, cephalopods have bilateral body symmetry, meaning that if they were split in half...
Cephalopod Morphology - SpringerLink
Jan 1, 2022 · With approximately 700 species, cephalopods exhibit a wide range of forms (Budelmann 1994). However, all these forms have a similar, molluscan body plan, with a head, a foot, and a visceral mass covered by a mantle (Hanlon and Messenger 1996).
Cephalopods and their Beak - Bioengineering Hyperbook
This report presents the brilliant principles behind the cephalopod’s beak designs. Cephalopods are a class of mollusk (Roper and Voss, 2020), so they are related to snails and clams, but today’s subjects are much more interesting (in the traditional, first-impression sense at least).