title: Limnodrilus sulphurensis n. sp., from a sulfur cave in Colorado, USA, with notes on the morphologically similar L. profundicola (Clitellata, Naididae, Tubificinae).
abstract: A new species of the tubificine genus Limnodrilus is described and COI barcoded from Sulphur Cave and associated springs in Colorado, USA. The habitats are characterized by high sulfide concentrations. The new species, L. sulphurensis, is distinguished from all congeners by the elongate, nearly parallel teeth of chaetae in its anterior segments. It has a penis sheath resembling that of L. profundicola; consequently, museum specimens and new collections are examined here to resolve some of the taxonomic confusion surrounding that widespread, but uncommon species.
authors.affiliation: US Geological Survey, Menlo Park, California, U.S.A.; Email: svfend@usgs.gov.
authors.forename: Steven V
authors.initials: SV
authors.lastname: Fend
authors.affiliation: University of Gothenburg, Göteborg, Sweden; Email: unknown.
authors.forename: Yingkui
authors.initials: Y
authors.lastname: Liu
authors.affiliation: University of Gothenburg, Göteborg, Sweden; Email: unknown.
authors.forename: David
authors.initials: D
authors.lastname: Steinmann
authors.affiliation: University of Hamburg, Hamburg, Germany; Email: unknown.
authors.forename: Olav
authors.initials: O
authors.lastname: Giere
authors.affiliation: University of Akron, Akron, Ohio, U.S.A.; Email: unknown.
authors.forename: Hazel A
authors.initials: HA
authors.lastname: Barton
authors.affiliation: University of Colorado, Boulder, U.S.A.; Email: unknown.
authors.forename: Fred
authors.initials: F
authors.lastname: Luiszer
authors.affiliation: University of Gothenburg, Göteborg, Sweden; Email: unknown.
authors.forename: Christer
authors.initials: C
authors.lastname: Erséus
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D059552:Caves / Q000737:chemistry; D003120:Colorado; D017753:Ecosystem; D008297:Male; D009835:Oligochaeta / Q000033:anatomy & histology* / Q000145:classification* / Q000254:growth & development; D009929:Organ Size; D013455:Sulfur / Q000032:analysis
chemical_list: D013455:Sulfur