Permian–Triassic Extinction Event - Extinction Patterns

Extinction Patterns

Marine extinctions Genera extinct Notes
Marine invertebrates

Foraminifera

97% Fusulinids died out, but were almost extinct before the catastrophe

Radiolaria (plankton)

99%

Anthozoa (sea anemones, corals, etc.)

96% Tabulate and rugose corals died out

Bryozoans

79% Fenestrates, trepostomes, and cryptostomes died out

Brachiopods

96% Orthids and productids died out

Bivalves

59%

Gastropods (snails)

98%

Ammonites (cephalopods)

97%

Crinoids (echinoderms)

98% Inadunates and camerates died out

Blastoids (echinoderms)

100% May have become extinct shortly before the P–Tr boundary

Trilobites

100% In decline since the Devonian; only 2 genera living before the extinction

Eurypterids ("sea scorpions")

100% May have become extinct shortly before the P–Tr boundary

Ostracods (small crustaceans)

59%
Fish

Acanthodians

100% In decline since the Devonian, with only one living family

Read more about this topic:  Permian–Triassic Extinction Event

Other articles related to "extinction patterns, pattern, extinction":

Permian–Triassic Extinction Event - Extinction Patterns - Possible Explanations of These Patterns
... This pattern is consistent with what is known about the effects of hypoxia, a shortage but not a total absence of oxygen ... had to become severely hypoxic to account for the magnitude of the extinction, but such a catastrophe would make it difficult to explain the very selective pattern of the extinction ... day levels—the decline in oxygen levels does not match the temporal pattern of the extinction ...

Famous quotes containing the words patterns and/or extinction:

    Persons grouped around a fire or candle for warmth or light are less able to pursue independent thoughts, or even tasks, than people supplied with electric light. In the same way, the social and educational patterns latent in automation are those of self- employment and artistic autonomy.
    Marshall McLuhan (1911–1980)

    Man is an over-complicated organism. If he is doomed to extinction he will die out for want of simplicity.
    Ezra Pound (1885–1972)