Narceus

Narceus
	Narceus americanus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Myriapoda
Class:	Diplopoda
Order:	Spirobolida
Family:	Spirobolidae
Genus:	Narceus; Rafinesque 1820
Synonyms
	Rhexenor (Rafinesque 1820)[1][2]

Narceus is a genus of large cylindrical millipedes of the family Spirobolidae native to eastern North America. The genus comprises three or four species, two of which are endemic to Florida, and the remainder forming a species complex. The species of Narceus include some of the largest and most recognizable millipedes in eastern North America.

Description

Narceus individuals range from 4 to 12 cm (1.6 to 4.7 in) long, with 45 to 59 segments as adults. Their body color is various shades of brown with reddish to yellow stripes on each segment.[3]

Species

Narceus americanus / Narceus annularis complex - New England to Minnesota, south to Texas and Florida. Extends into southern Quebec and Ontario in Canada.
Narceus gordanus - Florida to South Carolina, possibly Tennessee[3]
Narceus woodruffi - Florida

The species N. americanus and N. annularis are widely distributed in North America, and may represent an intergradation of forms rather than two distinct species, a group known as the "N. americanus/annularis complex".[4]

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References

Rafinesque, C. S. (1820). "VI Class. Entomia. - The Insects". Annals of Nature. 1: 8. Retrieved from Biodiversity Heritage Library.
For the origin of this name, see Rhexenor.
Keeton, William T. (1960). "A taxonomic study of the milliped family Spirobolidae (Diplopoda; Spirobolida)". Memoirs of the American Entomological Society. 17: 1–146.
Shelley, Rowland M.; McAllister, Chris T.; Medrano, Michael F. (2006). "Distribution of the Milliped Genus Narceus Rafinesque, 1820 (Spirobolida: Spirobolidae): Occurrences in New England and West of the Mississippi River; a Summary of Peripheral Localities; and First Records From Connecticut, Delaware, Maine, and Minnesota". Western North American Naturalist. 66 (3): 374–389. doi:10.3398/1527-0904(2006)66[374:DOTMGN]2.0.CO;2.

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[1] Rafinesque, C. S. (1820). "VI Class. Entomia. - The Insects". Annals of Nature. 1: 8. Retrieved from Biodiversity Heritage Library.

[2] For the origin of this name, see Rhexenor.

[Keeton1960-3] Keeton, William T. (1960). "A taxonomic study of the milliped family Spirobolidae (Diplopoda; Spirobolida)". Memoirs of the American Entomological Society. 17: 1–146.

[Shelleyetal2006-4] Shelley, Rowland M.; McAllister, Chris T.; Medrano, Michael F. (2006). "Distribution of the Milliped Genus Narceus Rafinesque, 1820 (Spirobolida: Spirobolidae): Occurrences in New England and West of the Mississippi River; a Summary of Peripheral Localities; and First Records From Connecticut, Delaware, Maine, and Minnesota". Western North American Naturalist. 66 (3): 374–389. doi:10.3398/1527-0904(2006)66[374:DOTMGN]2.0.CO;2.