Definitions for Stegocephalia
ste·go·cephali·a

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Stegocephalia, order Stegocephalianoun

   in former classifications a division of class Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia

WikipediaRate this definition:0.0 / 0 votes

1. Stegocephalia

   Stegocephali (often spelled Stegocephalia) is a group containing all four-limbed vertebrates. It is equivalent to a broad definition of Tetrapoda: under this broad definition, the term "tetrapod" applies to any animal descended from the first vertebrate with limbs and toes, rather than fins. This includes both the modern lineage of limbed vertebrates (the crown group, including modern amphibians, mammals, reptiles and birds) as well as a portion of the stem group, limbed vertebrates that evolved prior to the origin of the crown group. Members of the tetrapod stem group include the earliest limbed tetrapodomorphs such as Ichthyostega and Acanthostega, which evolved in the Devonian Period long before any modern form of tetrapod. Many paleontologists prefer a stricter definition of Tetrapoda which applies solely to the crown group, excluding earlier types of limbed tetrapodomorphs. Stegocephali was re-established to replace the broad definition of Tetrapoda, resolving the usage of two conflicting definitions in discussions of tetrapod evolution. Stegocephali (from Greek στεγοκεφαλια 'roofed head') was coined in 1868 by the American paleontologist Edward Drinker Cope, who used it as a general category of prehistoric amphibians. This name was in reference to the skull form of many early tetrapods, with a low, solid shape combining numerous strongly-textured dermal bones. In its original usage, the term quickly became obsolete. In 1998, Canadian paleontologist Michel Laurin repopularized the term and provided a formal phylogenetic definition as a monophyletic clade containing both crown-group and stem-group tetrapods. Laurin's Stegocephali is roughly defined as including all vertebrates closer to modern tetrapods than to Panderichthys. This definition was intended to include taxa with digits rather than fins, except where secondarily lost. Another definition, published in Phylonyms, defines the group as including all taxa closer to Eryops than to Tiktaalik, Panderichthys, or Eusthenopteron. The discovery of the Zachelmie trackways in 2010 suggests that stegocephalians possibly emerged 395 Ma or earlier.

ChatGPTRate this definition:0.0 / 0 votes

1. stegocephalia

   Stegocephalia is an obsolete term that was previously used to refer to a subclass of tetrapods, or four-legged vertebrates. This group included amphibians and other four-legged animals with certain primitive features, which were believed to be the earliest terrestrial vertebrates. The term "Stegocephalia" is now largely unused in modern scientific classification.

WikidataRate this definition:0.0 / 0 votes

1. Stegocephalia

   Stegocephalia is an older name for the large fossil amphibians, comprising all pre-Jurassic and some later extinct large groups having more or less salamander-like build. The term was coined in 1868 by American palaentologist Edward Drinker Cope and comes from Greek στεγοκεφαλια - "roofed head", and refer to the copious amounts of dermal armour some of the larger primitive forms evidently had. In recent times, Canadian paleontologist Michel Laurin has used as a phylogenetic expression to encompass all vertebrates with toes rather than fins, i.e. tetrapods.

Matched Categories

1. • Animal Order

How to pronounce Stegocephalia?

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Numerology

1. Chaldean Numerology

   The numerical value of Stegocephalia in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of Stegocephalia in Pythagorean Numerology is: 4

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Stegocephalia
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Stegocephalia
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Stegocephalia