Holocephali - Wikipedia
They are deep sea fish with slender tails, living close to the seabed to feed on benthic invertebrates. They lack a stomach, their food moving directly into the intestine. Extinct holocephalans were much more diverse in lifestyles, including shark -like predatory forms and slow, durophagous fish.
Chimaera | Definition & Facts | Britannica
chimaera, (subclass Holocephali), any of numerous cartilaginous fishes related to sharks and rays in the class Chondrichthyes but separated from them as the subclass (or sometimes class) Holocephali.
Holocephali - an overview | ScienceDirect Topics
Chondrichthyes: Holocephali (Chimaeriformes). Although Elasmobranchii and Holocephalii are both Chondrichthyes, the most primitive vertebrates containing true lymphoid organs, there are important differences between the two groups which are reflected in their respective lymphohemopoietic organs.
Chimaeras (Class Holocephali) - iNaturalist
The subclass Holocephali ('complete heads') is a taxon of cartilaginous fish in the class Chondrichthyes. The earliest fossils are of teeth and come from the Devonian period. Little is known about these primitive forms, and the only surviving group in the subclass is the order Chimaeriformes.
Evolutionary Origin and Phylogeny of the Modern Holocephalans ...
2010年6月14日 · Three species of the actinopterygians and four species of the sarcopterygians form reciprocal monophyletic groups, and they are together sister to the Chondrichthyes (Holocephali + Elasmobranchii).
Holocephali - an overview | ScienceDirect Topics
First, the Holocephali represent a small subclass of the Chondrichthyes and consists of around 40 species (Inoue et al., 2010) (Fig. 2). Classified within a single order, Chimaeriformes, they comprise two lineages including the elephant-fishes (Callorhinchus; termed ‘elephant shark’ in recent publications) and the rat- and rabbit-fishes ...
A symmoriiform chondrichthyan braincase and the origin of ... - Nature
2017年1月4日 · The chimaeroids, or Holocephali, are a major group of cartilaginous fishes obscurely related to sharks and rays—obscurely because chimaeroids are very distinctive in their appearance and are ...
HOLOCEPHALI – GENERAL ORGANIZATION AND AFFINITIES
Holocephali (Gr. Holos = entire + kephale = head), is a very small ancient group of highly specialized marine fishes. It comprises of rat-tailed fishes. They appeared first in the lower Jurassic and at present, are represented by a few marine genera only.
Chondrichthyes: Holocephali - Palaeos
However, it will do as a means to introduce some of the unique features of the Holocephali, as well as the living members of the Chimaeroidei. One of the most obvious features is that the creature looks more like a grasshopper than a fish.
Sixth sense in the deep-sea: the electrosensory system in ... - Nature
2022年6月14日 · Among the deep-sea cartilaginous fishes, the holocephalans (Chondrichthyes: Holocephali) are a small, ancient and poorly studied group of cartilaginous fishes that live worldwide in the deep ...