They are panarthropods with stubby legs called lobopods, [5] a term which may also be used as a common name of this group as well. [6][7] While the definition of lobopodians may differ between literatures, [8] it usually refers to a group of soft-bodied, marine worm-like fossil panarthropods such as Aysheaia and Hallucigenia.

Lobopods are a bizarre group of extinct animals that have a segmented, worm-like body with legs. They may be related to living forms such as the onychophorans (velvet worms), tardigrades (water bears), and the arthropods. A number of globally distributed Cambrian species have been assigned to this group.

Cephalopods are soft-bodied animals; their primary skeletal features include a cartilaginous cranium and, in most forms, a rigid structure in the mantle composed of chitin (the gladius or “pen”), calcium carbonate (cuttle-bone and ram’s-horn shell), or cartilage (fin supports in finned octopods).One pair of gills is present except in Nautilus, w...

lopods. Nautiloids, traditionally considered basal within the cephalopods, are generally depicted as evolving from a creeping Cambrian ancestor whose dorsal shell afforded protection and...

lobopod, collective name for two phyla of animals: Onychophora and Tardigrada. Phyla Onychophora and Tardigrada have long been considered separate from their close arthropod relatives.

Knowing something about how the anatomy of cepha-lopods has evolved, as well as their behaviour, is central to having an understanding of their place in the ecosystem, how they can be harvested sustainably, and why they are especially suitable for human consumption.

With few exceptions, the eyes are the most prom-inent sensory features of cephalopods (Budelmann 1996), with the optic lobes being the most dominant region of the brain (Young 1962). Resembling the vertebrate eye, the cepha-lopod eye incorporates a large posterior chamber, lens, iris, retina, choroid, sclera, and argenta (Budelmann 1994).

Here we introduce a new protocol for photoreceptor microspectrophotometry (MSP) that overcomes the diffi-culty of bleaching the bistable visual pigment and that reveals eight coastal coleoid cephalopods to be monochromatic with lmax varying from 484 to 505 nm.

1989年1月1日 · Developmental morphology deals with structural and functional aspects of ontogeny in an evolutionary perspective. It is the pivotal discipline of “systematic morphology” as proposed by Naef (1923, 1928) on the basis of his cephalopod studies.

2005年3月23日 · lopods Octopus bimaculoides, Sepia officinalis, and Loli-guncula brevis was examined using dissection and histol-ogy. Serial sections in three mutually perpendicular planes were used to identify the muscles and connective tissues responsible for beak movements and stability and to describe their morphology and fiber trajectories. Four