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A PUTATIVE NEW SPECIES IN THE GUNUS RADULA (HEPATICAE) FROM THE SOUTHEASTERN U.S.

A PUTATIVE NEW SPECIES IN THE GUNUS RADULA (HEPATICAE) FROM THE SOUTHEASTERN U.S. Paul G. Davison, Dept. of Biology, Univ. of North Alabama, Florence, AL 35632.

The genus Radula Dumort. is an isolated and well-defined group comprising the whole of the family Radulaceae and the suborder Radulinae. This predominately tropical genus consists of about 250 accepted species as listed by Yamada in 1986. Fourteen species occur in North America, north of Mexico, with ten species occurring in the southeastern U.S. In September, 1998, a new species of Radula was discovered on several limestone outcrops around a seasonal cold air vent in karst topography in NE Alabama. This new Radula clearly belongs to section Caducifoliae Schust. due to the possession of caducous leaves and long attachment of the leaf lobule to the stem. Radula obconica, R. sullivantii, and R floridana are the only North American representatives of section Caducifoliae, and the new Radula differs from these species in details of lobule attachment, stem anatomy, and dorsal leaf insertion. Comparison with neotropical and Asiatic species is needed.
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Publication:Journal of the Alabama Academy of Science
Article Type:Brief Article
Geographic Code:1USA
Date:Jan 1, 2000
Words:177
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