Hyolithellus

Hyolithellus; Temporal range: Lower Cambrian – Middle Cambrian[1] PreЄ Є O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Stem group:	Annelida
Genus:	†Hyolithellus; Billings, 1871

Hyolithellus is a conical tubular fossil from the Cambrian, originally considered a hyolith but since has been reinterpreted (tentatively) as an annelid worm.^[1]

Its circular, thin (15–150 μm), originally phosphatic tube gets wider along its long, undulating, annulated length.^[1]

References

1 2 3 Christian B. Skovsted & John S. Peel (2011). "Hyolithellus in life position from the Lower Cambrian of North Greenland". Journal of Paleontology. 85 (1): 37–47. doi:10.1666/10-065.1.

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[ref_-1] 1 2 3 Christian B. Skovsted & John S. Peel (2011). "Hyolithellus in life position from the Lower Cambrian of North Greenland". Journal of Paleontology. 85 (1): 37–47. doi:10.1666/10-065.1.