Rhyniella

Rhyniella; Temporal range: Early Devonian, Pragian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Entognatha (?)
Subclass:	Collembola
Genus:	†Rhyniella
Species:	†R. praecursor
Binomial name
	†Rhyniella praecursor; Hirst & Maulik 1926

Rhyniella is a genus of fossil springtails (Collembola) from the Rhynie chert, which formed during the Pragian stage of the Early Devonian. One species has been described, Rhyniella praecursor. Its name means "small creature of the Rhynie chert, a forerunner [of modern hexapoda]". For some time it was believed to be the only hexapod from the Early Devonian (c. 410 million years ago). It was possibly the same animal as Rhyniognatha (partim).^[1]

History[]

Its remains were discovered in 1919. Reconstructed from the scattered bits and pieces of its exoskeleton, R. praecursor was described in 1926, and at first believed to be a larval insect.^[2]

Mouthparts initially assigned to R. praecursor were redescribed as Rhyniognatha hirsti in 1928.^[1] In 2004, Rhyniognatha hirsti was found to be an insect, the oldest known to date.^[3]

Description[]

Rhyniella grew to a length of about 1–2 mm and would have been a scavenger, feeding on rotting matter.^[4]

References[]

^ ^a ^b R. J. Tillyard. 1928. Some remarks on the Devonian fossil insects from the Rhynie chert beds, Old Red Sandstone. Transactions of the Entomological Society of London 76:65-71
^ Hirst, Stanley; Maulik, S. (1926). "On some Arthropod Remains from the Rhynie Chert (Old Red Sandstone)". Geological Magazine. 63 (2): 69–71. doi:10.1017/S0016756800083692.
^ Engel, M. S.; Grimaldi, D. A. (2004). "New light shed on the oldest insect". Nature. 427 (6975): 627–630. doi:10.1038/nature02291. PMID 14961119. S2CID 4431205.
^ Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 74

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[Tillyard1928-1] R. J. Tillyard. 1928. Some remarks on the Devonian fossil insects from the Rhynie chert beds, Old Red Sandstone. Transactions of the Entomological Society of London 76:65-71

[2] Hirst, Stanley; Maulik, S. (1926). "On some Arthropod Remains from the Rhynie Chert (Old Red Sandstone)". Geological Magazine. 63 (2): 69–71. doi:10.1017/S0016756800083692.

[3] Engel, M. S.; Grimaldi, D. A. (2004). "New light shed on the oldest insect". Nature. 427 (6975): 627–630. doi:10.1038/nature02291. PMID 14961119. S2CID 4431205.

[4] Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 74

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