| Abstract: | Noncalcified thalli, consisting of a narrow main axis with numerous branched hairlike laterals in whorls and a subapical array of undivided clavate laterals, from the Silurian (Llandovery) Brandon Bridge Formation of southeastern Wisconsin, constitute the basis for a new genus and species of dasycladalean alga, Heterocladus waukeshaensis. A relationship within the family Triploporellaceae is indicated by the whorled arrangement of the laterals and the absence of gametophores on mature specimens. A compilation of occurrence data suggests that noncalcified dasyclads, as a whole, were more abundant and diverse during the Ordovician and Silurian than at any other time in their history. The heterocladous thallus architecture of this alga adds to a wide range of morphological variation documented among Ordovician and Silurian dasyclads, the sum of which indicates that Dasycladales underwent a significant evolutionary radiation during the early Paleozoic. |
| Genre: | Article |
| ProdID: | 70024906 |
| Citation Author: | LoDuca, S. T.; Kluessendorf, J.; Mikulic, D. G. |
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| Citation End Page: | 1158 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Paleontology |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | A New Noncalcified Dasycladalean Alga from the Silurian of Wisconsin; 2003; Article; Journal; Journal of Paleontology; LoDuca, S. T.; Kluessendorf, J.; Mikulic, D. G. |
| Citation Start Page: | 1152 |
| Citation Volume: | 77 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | A New Noncalcified Dasycladalean Alga from the Silurian of Wisconsin; 2003; Article; Journal; Journal of Paleontology; LoDuca, S. T.; Kluessendorf, J.; Mikulic, D. G. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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