Skip to main content Skip to main navigation menu Skip to site footer
Published: 2019-08-19

Urochordeumatidae Silvestri, 1909, a millipede family endemic to Washington State, USA (Chordeumatida, Striariidea, Striarioidea)

Professor Emeritus, Biology Department, Hampden-Sydney College, Hampden-Sydney, VA 23943 USA.
Entomology Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Myriapoda Urochordeuma bumpusi Urochordeuma porona Mount Rainier National Park


Urochordeumatidae Silvestri, 1909 includes a single species, Urochordeuma bumpusi Silvestri, 1909, with U. porona Chamberlin, 1941 as a new junior subjective synonym. The family Urochordeumatidae is removed from the superfamily Caseyoidea and transferred to the superfamily Striarioidea. The species is known only from four counties in Washington State in the North Cascades: Pierce, King, Thurston and Whatcom. The occurrence of U. bumpusi from Whatcom County is a significant range extension.



  1. Chamberlin, R.V. (1941) New American millipeds. Bulletin of the University of Utah, 6(4)/31(11), 1–389. Available from: (Accessed 16 Aug. 2019)

    Cook, O. F. & Collins, G. (1895) The Craspedosomatidae of North America. Annals of the New York Academy of Sciences, 9, 1–100.

    Hoffman, R.L. (1999) Checklist of Millipeds of North and Middle America. Virginia Museum of Natural History, Special Publication No. 8, 584 pp. Available from:
    (Accessed 16 Aug. 2019)

    Jeekel, C.A.W. (1971) Nomenclator generum et familium Diplopodorum: a list of the genus and family-group names in the Class Diplopoda from the 10th edition of Linneaus, 1758, to the end of 1957. Monographieën van de Nederlandse Entomologische Vereniging No. 5, 412 pp.

    Shear, W.A. (1972) Studies in the milliped order Chordeumida (Diplopoda). A revision of the family Cleidogonidae and a reclassification of the order Chordeumida in the New World. – Bulletin of the Museum of Comparative Zoology, 144, 151–352. Available from: (Accessed 16 Aug. 2019)

    Shorthouse, D.P. (2010) SimpleMappr, an online tool to produce publication-quality point maps. Available from: (accessed 22 April 2019)

    Silvestri, F. (1909) Descrizioni preliminari di varii Artropodi, specialmente d’ America. III. Nuovi Chordeumoidea (Diplopoda). Rendiconti, Accademia Nazionale dei Lincei, 5. Ser. / Classe di Scienze Fisiche, Matematiche e Naturali, 18, 229–233. Available from: (Accessed 16 Aug. 2019)

    Silvestri, F. (1913) Illustrazione di due famiglie di Chordeumoidea (Diplopoda) del Nord America. Bollettino del Laboratorio di zoologia generale e agraria della Facoltà agraria in Portici, 7, 303–310. Available from: (Accessed 16 Aug. 2019)