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Evolution of fish: Jawless fish, Jawed fish & Overview

Fish began evolving about 530 million years ago during the Cambrian explosion. It was during this time that the early chordates developed the skull and the vertebral column, leading to the first craniates and vertebrates. The first fish lineages belong to the Agnatha, or jawless fish. Early examples include Haikouichthys. During the late Cambrian…

Language: English [EN]
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Evolution of fish topic overview

The analysis highlights Jawless fish, Jawed fish and Overview as prominent areas in the source structure around Evolution of fish.

Related topics
166
Source areas
3
Connected nodes
169
Extracted relationships
6
Related term clusters
39
Bridge connections
169

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 91 topics
Jawless fish · 40 topics
Jawed fish · 35 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

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Evolution of fish
3Sarcopterygii · Actinopterygii · Dominance (ecology)
3Phylogenetics · Cladogram · Philippe Janvier
3Polyphyly · Paraphyly · Stem group
3Coelacanth · Lungfish · Tetrapodomorph
17Fish · Evolving · Cambrian explosion

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Jawless fish

Jawed fish

For the semantics nerds

You can skip this section if you’re here for content ideas and keyword inspiration.

Advanced semantic analysis

How Evolution of fish connects Entity context

See recurring relationship patterns around Evolution of fish before inspecting the individual extracted relationships.

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

fish vertebrates devonian bony ostracoderms lobe-finned sharks silurian evolved jawless placoderms known jawed appeared armoured mya conodonts two extinct period

Evolution of fish relationships Subject–Predicate–Object triples

TTTA extracted 6 structured relationships around Evolution of fish. Examples in this analysis include the presence of a backbone → instance of → rather than purely on physical traits and catfish → instance of → He compared them at first with extant armored fish. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
the presence of a backboneinstance ofrather than purely on physical traits0.80text
catfishinstance ofHe compared them at first with extant armored fish0.80text
sturgeons but laterinstance ofHe compared them at first with extant armored fish0.80text
realizing that they had no movable jawsinstance ofHe compared them at first with extant armored fish0.80text
classified them in 1844 into a new groupinstance ofHe compared them at first with extant armored fish0.80text
the coelacanths show a strong similarity to the expected ancestral form of tetrapod limbsinstance ofThe fin-limbs of lobe-finned fish0.80text

Related concept clusters Related term clusters

The concept neighborhoods around Evolution of fish bring nearby vocabulary together. In this analysis, examples include Lobe-finned, Bony and Jawless. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • extinct
    • Class
    • Spiny
    • Became
    • Jawed
    • Sharks
    • Group
    • Bony
    • Fish
    • Also
    • Cartilaginous
    • Extinction
    • Groups
  • jawed vertebrates
    • Evolved
    • Vertebrates
    • Placoderms
    • Jaws
    • Ordovician
    • Ostracoderms
    • Also
    • Cartilaginous
    • Became
    • Mya
    • Period
    • Jawless
  • ordovician–silurian extinction events
    • Silurian
    • Devonian
    • Period
    • Mya
    • Vertebrates
    • Bony
    • Years
    • Placoderms
    • Tetrapods
    • Sharks
    • Extinction
    • Ordovician
  • early cambrian
    • Placoderms
    • Lobe-finned
    • Devonian
    • Mya
    • Vertebrates
    • Fish
    • Also
    • Cartilaginous
    • Period
    • Appeared
    • Jawed
    • Jawless
  • Evolution of fish
    • Lobe-finned
    • Bony
    • Jawless
    • Evolved
    • Devonian
    • Ostracoderms
    • Placoderms
    • Armoured
    • Jawed
    • Silurian
    • Cartilaginous
    • Ray-finned
  • evolution of fish
    • Lobe-finned
    • Bony
    • Jawless
    • Evolved
    • Devonian
    • Ostracoderms
    • Placoderms
    • Armoured
    • Jawed
    • Silurian
    • Cartilaginous
    • Ray-finned
  • fish
    • Lobe-finned
    • Bony
    • Jawless
    • Evolved
    • Devonian
    • Ostracoderms
    • Placoderms
    • Armoured
    • Jawed
    • Silurian
    • Cartilaginous
    • Ray-finned
  • bony fish
    • Cartilaginous
    • Lobe-finned
    • Bony
    • Fish
    • Jawless
    • Evolved
    • Devonian
    • Ostracoderms
    • Class
    • Spiny
    • Placoderms
    • Groups

Connections between topic areas Semantic bridges

For Evolution of fish, one of the stronger structural bridges in this analysis connects Evolution of fish with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Evolution of fish — Overview · splits 78 ⟂ 92
Evolution of fish — Jawless fish · splits 129 ⟂ 41
Evolution of fish — Jawed fish · splits 134 ⟂ 36

Map overview Semantic statistics

Evolution of fish

Nodes170
Edges169
Triples6
Avg. degree1.99
Density0.011765
Components1

Source & methodology

TTTA analyzes the structure around Evolution of fish to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Jawless fish, Jawed fish & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Evolution of fish · EN edition · Analysis: TopicsToTalkAbout

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