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Temporal range: Late Carboniferous[1]
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Diplopoda
Superorder: Juliformia
Superfamily: Xyloiuloidea
Family: Xyloiulidae
Cook, 1895
Genus: Xyloiulus
Cook, 1895
Type species
Xyloiulus sigillariae
(Dawson), 1860

Xyloiulus bairdi Hoffman, 1963
Xyloiulus frustulentis Scudder, 1890
Xyloiulus mazonus Scudder, 1890
Xyloiulus pstrossi Fritsch
Xyloiulus sigillariae (Dawson), 1860
Xyloiulus sellatus Fritsch



Xyloiulus is an extinct genus of millipede that lived during the Late Carboniferous which grew up to 2.25 inches (5.7 cm) in length. Fossils of the animal have been found in North America and Europe.[2] The fossils are typically found in Sigillarian stumps.[3]


  1. ^ Hoffman, R.L. (1963). "New genera and species of Upper Paleozoic Diplopoda". Journal of Paleontology. 37 (1): 167–174. JSTOR 1301419. 
  2. ^ Palmer, Douglas; et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (first American ed.). New York City: DK Publishing. p. 161. ISBN 9780756655730. 
  3. ^ Annals of the New York Academy of Sciences. New York Academy of Sciences. 1897-01-01. p. 3. 

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