The milliped genus Underwoodia (Chordeumatida: Caseyidae)
The milliped genus Underwoodia comprises three species that are characterized primarily by the configurations of branches a and c of the anterior gonopod colpocoxites and the degree to which the latter is segregated from process b. Underwoodia iuloides ranges across Canada from Newfoundland to Saska...
| Published in: | Canadian Journal of Zoology |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Canadian Science Publishing
1993
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/z93-023 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-023 |
| Summary: | The milliped genus Underwoodia comprises three species that are characterized primarily by the configurations of branches a and c of the anterior gonopod colpocoxites and the degree to which the latter is segregated from process b. Underwoodia iuloides ranges across Canada from Newfoundland to Saskatchewan, extending southward in the United States to New York, Michigan, Wisconsin, North Dakota, and northeastern New Mexico. Underwoodia tida Chamberlin, whose questionable referral to this genus is confirmed, ranges from the Rocky Mountains of Alberta to the Wasatch and Oquirrh Mountains of northern Utah, and probably extends westward to the Coast Range of British Columbia and the Alaska panhandle. Underwoodia hespera Chamberlin is placed in synonymy under this species. Underwoodia kurtschevae Golovatch occurs in east Asia, being known from Sakhalin Island, the Kurile Islands, and mainland sites in the Russian Far East. The genus is thus Holarctic and demonstrates a clear trans-Beringian distribution pattern. Parthenogenesis appears to be an autapotypy, as females greatly outnumber males in all three races. |
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