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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| - 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.
- 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.
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| - Fossil of S. floundensi. Scale in millimetres.
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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.
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