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- W10716723 abstract "Large, heavily scaled tomocerid springtails (Collembola) are abundant in easternforests, and are important components of the detrital food web. The genusPogonognathellus predominates in the southern Appalachians While a numberof well-delimited tomocerid species have been described, others have vaguemorphological boundaries and appear to be species complexes. Before thisstudy began in 2005, four species were known to occur in Great SmokyMountains National Park (GSMNP) and the surrounding Appalachians (P.bidentatus, dubius, elongatus, flavescens). Also occurring throughout the area isTomocerus lamellifera, a widespread and distinctive species. The goals of thisproject were to correlate scale patterns and colors, ground color, morphology,and DNA sequences for separation of species; to describe any new speciesdetected; and to redescribe known species. Scale patterns and molecularsequences have not been previously studied in North American Tomoceridae. We collected 432 specimens from diverse localities and maintained themin culture containers. After a specimen molted, it was photographed to capturethe pristine scale pattern and color, then preserved in 100% ethanol (EtOH). Thepreserved specimen then was re-photographed for ground color (most scales aredislodged in preservative). Selected specimens were dissected and the variousappendages (legs, mouthparts, furcula) were slide-mounted for morphologicalanalysis. The torso was used to obtain DNA, from which the 5’-3’exoribonuclease II gene was amplified, sequenced, and analyzedphylogenetically. Freshly collected specimens of P. flavescens from the typelocality (Sweden), preserved in 100% EtOH, were provided by Arne Fjellberg andincluded in the analysis. Tomocerus minor and Harlomillsia oculata(Oncopoduridae) were used as outgroups for the phylogenetic analysis. A phylogenetic tree based on the molecular sequences was used toindicate relationships that then were tested with morphological characters,chaetotaxy, scale pattern, and color. Putative P. flavescens from North Americawere not grouped with Swedish specimens, raising the possibility that P.flavescens does not occur in North America. Pogonognathellus nigritus,previously synonymized with P. elongatus, was determined to be a valid species,and P. elongatus itself was found to be mis-described in most accounts. Twonew species were identified: one from a cave in GSMNP which is closely relatedto a California cave species, and a second from several forest localities (i.e.GSMNP and Mount Mitchell, NC). A group of specimens ascribed to theflavescens/dubius complex also appear to represent several undescribedspecies, but more specimens are needed for further analysis." @default.
- W10716723 created "2016-06-24" @default.
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- W10716723 date "2007-01-01" @default.
- W10716723 modified "2023-09-24" @default.
- W10716723 title "A Revision of Tomoceridae (Insecta: Collembola) in Great Smoky Mountains National Park and Southern Appalachians Using Morphological and Molecular Approaches" @default.
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