We present a phylogenetic analysis of the moss genus Daltonia based on nucleotide sequences from three plastid loci (psbT, trnL, trnG) plus the nuclear ribosomal RNA gene (ITS), including 9 of 21 species in this genus. Of the nine species, seven are well-supported as monophyletic, even when multiple accessions came from different continents. Early diverging species in the genus have relatively restricted ranges that are limited to a single continent, whereas most or all later-diverging species have broad intercontinental distributions. The observation that intercontinental distributions are repeated in multiple monophyletic species suggests that a key innovation underlying enhanced abilities for long dispersal evolved within Daltonia, and that this potential was inherited among derived species from their common ancestor. The nature of this (these) innovation(s) remains obscure, but may be related to both relaxation of ecological limitations on establishment, and to effective dispersal of spores per se.
New distributional records of mosses are given for ten counties in Arkansas.Astomum phascoides (Hook. ex Drumm.) Grout and Leskea polycarpa Hedw. are reported new to the state.A total of 100 county and two state moss distributional records have been identified from ten Arkansas counties. These counties and their four-letter abbreviation are: Arkansas (ARKA), Clark (CLAR), Dallas (DALL), Garland (GARL), Grant (GRAN), Hot Spring (HSPR), Montgomery (MONT), Ouachita (OUAC), Pike (PIKE), and Union (UNIO).Voucher specimens of all species collected are deposited in the herbarium of Henderson State University, Arkadelphia, Arkansas. Nomenclature for the most part follows that of Anderson et al. (1990). New state records are identified with an asterisk (*).
Requestfor LiteratureThe association of Systematics Collections (ASC) is embarking on a second round of obtaining biosystematic literature for the Biodiversity InformationExchange with Cuba Project. This time, literature acquired will be distributed to institutions outside of Havana. Cuban research institutions, trying to build biodiversity information resources, have a great need for current and back issues of The Bryologist and other ecological and biosystematic literature. To donate and for more information, please contact Elizabeth Hathway,
New state and county distributional records of mosses and liverworts are given for I] counties in Arkansas. Syntrichia ruralis is reported for the first time in the state and Thuidium allenii is confirmed for the state.A total of 83 county records, one of which is a state record, have been identified from 11 Arkansas counties. Voucher specimens of all species collected are deposited in the herbarium of Henderson State University (HEND) or in the author's personal herbarium. Nomenclature for the most part follows that of Anderson (1990) and Anderson et al.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.