Ostracodermi

Target entity: Ostracodermi
Context triple: [Anaspida, relatedTo, Ostracodermi]

• A. Placodermi
  Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
• B. Ambulacraria
  Ambulacraria is a major clade of deuterostome animals that unites echinoderms (such as starfish and sea urchins) with hemichordates (such as acorn worms) based on shared developmental and anatomical features.
• C. Holocephali
  Holocephali is a subclass of cartilaginous fishes that includes the chimaeras, deep-sea relatives of sharks and rays characterized by a single gill opening and distinctive tooth plates.
• D. Rangeomorphs
  Rangeomorphs are an extinct group of frond-like Ediacaran organisms characterized by highly branched, fractal body forms that represent some of the earliest complex multicellular life on Earth.
• E. Echinodermata
  Echinodermata is a phylum of marine invertebrates that includes starfish, sea urchins, sand dollars, and sea cucumbers, characterized by radial symmetry and a water vascular system.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Ostracodermi
Target entity description: Ostracodermi were an extinct group of primitive, armored jawless fishes that lived during the Paleozoic era and are among the earliest known vertebrates.

• A. Placodermi
  Placodermi is an extinct class of armored prehistoric fishes that were among the earliest jawed vertebrates.
• B. Ambulacraria
  Ambulacraria is a major clade of deuterostome animals that unites echinoderms (such as starfish and sea urchins) with hemichordates (such as acorn worms) based on shared developmental and anatomical features.
• C. Holocephali
  Holocephali is a subclass of cartilaginous fishes that includes the chimaeras, deep-sea relatives of sharks and rays characterized by a single gill opening and distinctive tooth plates.
• D. Rangeomorphs
  Rangeomorphs are an extinct group of frond-like Ediacaran organisms characterized by highly branched, fractal body forms that represent some of the earliest complex multicellular life on Earth.
• E. Echinodermata
  Echinodermata is a phylum of marine invertebrates that includes starfish, sea urchins, sand dollars, and sea cucumbers, characterized by radial symmetry and a water vascular system.
• F. None of above. chosen