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Spriggina

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Fossils of Spriggina are known from the Ediacaran period, around 550 million years ago. The segmented organism reached about 3 cm in length and may have been predatory. Its bottom is covered with two rows of tough interlocking plates, while one row covered its top; its front few segments fused to form a head, which may have borne eyes and antennae. Fossils of Spriggina are known from the Ediacaran period, around . The segmented organism reached about 3 cm in length and may have been predatory. Its bottom is covered with two rows of tough interlocking plates, while one row covered its top; its front few segments fused to form a head, which may have borne eyes and antennae. Spriggina's affinity is currently unknown; whilst once considered an annelid worm, or even a rangeomorph-like frond, it is now considered to be an arthropod, perhaps related to the trilobites.

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dbr:Spriggina

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120

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Spriggina

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Fossil of S. floundensi. Scale in millimetres.

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S. floundensi

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Spriggina

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#

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Sketch reconstruction

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?Bilateria

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Spriggina_Sketch.gif

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Glaessner, 1958

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Spriggina floundensi

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250

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?Arthropoda

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?Animalia

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Fossils of Spriggina are known from the Ediacaran period, around 550 million years ago. The segmented organism reached about 3 cm in length and may have been predatory. Its bottom is covered with two rows of tough interlocking plates, while one row covered its top; its front few segments fused to form a head, which may have borne eyes and antennae. Spriggina's affinity is currently unknown; it has been classified as an annelid worm, a rangeomorph-like frond, and an arthropod, perhaps related to the trilobites. Lack of known segmented legs or limbs tends to make an arthropod classification premature. Fossils of Spriggina are known from the Ediacaran period, around . The segmented organism reached about 3 cm in length and may have been predatory. Its bottom is covered with two rows of tough interlocking plates, while one row covered its top; its front few segments fused to form a head, which may have borne eyes and antennae. Spriggina's affinity is currently unknown; whilst once considered an annelid worm, or even a rangeomorph-like frond, it is now considered to be an arthropod, perhaps related to the trilobites.