Caseyidae

Verhoeff, 1909

Genus Guides

Caseyidae is a of millipedes in the order Chordeumatida, established by Verhoeff in 1909. The family comprises approximately 7 and at least 40 described . members possess 30 body segments, counting the collum as the first and the as the last. The family exhibits a Holarctic distribution pattern, with species documented in North America and the Russian Far East.

Caseyidae by (c) David Anderson, some rights reserved (CC BY), uploaded by David Anderson. Used under a CC-BY license.

Caseyidae by (c) Casey H. Richart, some rights reserved (CC BY), uploaded by Casey H. Richart. Used under a CC-BY license.

Caseyidae by (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda. Used under a CC-BY license.

Pronunciation

How to pronounce Caseyidae: /kaˈseɪiˌaɪdi/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

have 30 segments (collum counted as first, as last). Within the Underwoodia, identification relies on the configuration of branches a and c of the colpocoxites and the degree of their segregation from process b.

Images

Distribution

Holarctic distribution. North America: Canada (Newfoundland to Saskatchewan, British Columbia including Charlotte Islands), United States (New York, Michigan, Wisconsin, North Dakota, northeastern New Mexico, Alaska including Alexander Archipelago, Washington, Utah). Asia: Russian Far East (Sakhalin Island, Kurile Islands, mainland sites). European Russia: North Caucasus, Central, East, South, and Northwest European Russia.

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Parthenogenesis

In the Underwoodia, females greatly outnumber males in all three races, suggesting may be an autapomorphic trait for this genus.