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Fishes and their precursors (spawn)

2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) © 2003-2026 hegel.net · Kai Froeb 2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) [Invertebrate deuterostomes] (internal skeleton without a spine) 2.3.3.3.1.2.3.1.1. [Jawless fishes and cartilaginous fishes] 2.3.3.3.1.2.3.1.2. [Bony fishes] (ossified skeleton) 2.3.3.3.1.2.3.1.3. One level back to Vertebrates and their precursors (deuterostomes, internal skeleton, red blood) One level further to [Invertebrate deuterostomes] (internal skeleton without a spine) One level further to [Jawless fishes and cartilaginous fishes] (skeleton still cartilaginous) One level further to [Bony fishes] (ossified skeleton)
2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) © 2003-2026 hegel.net · Kai Froeb 2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) One level back to Vertebrates and their precursors (deuterostomes, internal skeleton, red blood) One level further to [Invertebrate deuterostomes] (internal skeleton without a spine) One level further to [Jawless fishes and cartilaginous fishes] (skeleton still cartilaginous) One level further to [Bony fishes] (ossified skeleton) 2.3.3.3.1.2.3.1.1. [Invertebrate deuterostomes] [Echinoderms] 2.3.3.3.1.2.3.1.1.1. [Tunicates] (sea squirts, salps: notochord only in the larva) 2.3.3.3.1.2.3.1.1.2. [Lancelets] (notochord throughout life, still no head) 2.3.3.3.1.2.3.1.1.3. One level back to [Invertebrate deuterostomes] (internal skeleton without a spine) One level further to [Echinoderms] (starfish, sea urchins, sea cucumbers, crinoids: five-rayed, headless) One level further to [Tunicates] (sea squirts, salps: notochord only in the larva) One level further to [Lancelets] (notochord throughout life, still no head) 2.3.3.3.1.2.3.1.2. [Jawless fishes and cartilaginous fishes] [Jawless fishes] (lampreys, hagfishes: mouth without jaws) 2.3.3.3.1.2.3.1.2.1. [Placoderms] (extinct: the first jaws) 2.3.3.3.1.2.3.1.2.2. [Cartilaginous fishes] (sharks, rays, chimaeras) 2.3.3.3.1.2.3.1.2.3. One level back to [Jawless fishes and cartilaginous fishes] (skeleton still cartilaginous) One level further to [Jawless fishes] (lampreys, hagfishes: mouth without jaws) One level further to [Placoderms] (extinct: the first jaws) One level further to [Cartilaginous fishes] (sharks, rays, chimaeras) 2.3.3.3.1.2.3.1.3. [Bony fishes] (ossified skeleton) [Chondrosteans] (sturgeons, paddlefishes: transitional form) 2.3.3.3.1.2.3.1.3.1. [Ray-finned fishes] (eel, herring, cod, perch) 2.3.3.3.1.2.3.1.3.2. [Lobe-finned fishes] 2.3.3.3.1.2.3.1.3.3. One level back to [Bony fishes] (ossified skeleton) One level further to [Chondrosteans] (sturgeons, paddlefishes: transitional form) One level further to [Ray-finned fishes] (eel, herring, cod, perch) One level further to [Lobe-finned fishes] (coelacanths, lungfishes — transition to land)
2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) © 2003-2026 hegel.net · Kai Froeb 2.3.3.3.1.2.3.1. Fishes and their precursors (spawn) One level back to Vertebrates and their precursors (deuterostomes, internal skeleton, red blood) One level further to [Invertebrate deuterostomes] (internal skeleton without a spine) One level further to [Jawless fishes and cartilaginous fishes] (skeleton still cartilaginous) One level further to [Bony fishes] (ossified skeleton) 2.3.3.3.1.2.3.1.1. [Invertebrate deuterostomes] One level back to [Invertebrate deuterostomes] (internal skeleton without a spine) One level further to [Echinoderms] (starfish, sea urchins, sea cucumbers, crinoids: five-rayed, headless) One level further to [Tunicates] (sea squirts, salps: notochord only in the larva) One level further to [Lancelets] (notochord throughout life, still no head) 2.3.3.3.1.2.3.1.1.1. [Echinoderms] One level back to [Echinoderms] (starfish, sea urchins, sea cucumbers, crinoids: five-rayed, headless) 2.3.3.3.1.2.3.1.1.2. [Tunicates] (sea squirts, salps: notochord only in the larva) One level back to [Tunicates] (sea squirts, salps: notochord only in the larva) 2.3.3.3.1.2.3.1.1.3. [Lancelets] (notochord throughout life, still no head) One level back to [Lancelets] (notochord throughout life, still no head) 2.3.3.3.1.2.3.1.2. [Jawless fishes and cartilaginous fishes] One level back to [Jawless fishes and cartilaginous fishes] (skeleton still cartilaginous) One level further to [Jawless fishes] (lampreys, hagfishes: mouth without jaws) One level further to [Placoderms] (extinct: the first jaws) One level further to [Cartilaginous fishes] (sharks, rays, chimaeras) 2.3.3.3.1.2.3.1.2.1. [Jawless fishes] One level back to [Jawless fishes] (lampreys, hagfishes: mouth without jaws) 2.3.3.3.1.2.3.1.2.2. [Placoderms] (extinct: the first jaws) One level back to [Placoderms] (extinct: the first jaws) 2.3.3.3.1.2.3.1.2.3. [Cartilaginous fishes] (sharks, rays, chimaeras) One level back to [Cartilaginous fishes] (sharks, rays, chimaeras) 2.3.3.3.1.2.3.1.3. [Bony fishes] (ossified skeleton) One level back to [Bony fishes] (ossified skeleton) One level further to [Chondrosteans] (sturgeons, paddlefishes: transitional form) One level further to [Ray-finned fishes] (eel, herring, cod, perch) One level further to [Lobe-finned fishes] (coelacanths, lungfishes — transition to land) 2.3.3.3.1.2.3.1.3.1. [Chondrosteans] One level back to [Chondrosteans] (sturgeons, paddlefishes: transitional form) 2.3.3.3.1.2.3.1.3.2. [Ray-finned fishes] (eel, herring, cod, perch) One level back to [Ray-finned fishes] (eel, herring, cod, perch) 2.3.3.3.1.2.3.1.3.3. [Lobe-finned fishes] (coelacanths, lungfishes — transition to land) One level back to [Lobe-finned fishes] (coelacanths, lungfishes — transition to land)

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