3/19/2023 0 Comments Clawfish osuThese threats are especially pronounced in North America, where approximately 32% of crayfish species are ranked as endangered or vulnerable by the American Fisheries Society’s Endangered Species Crayfish Subcommittee ( Taylor et al., 2007). nov.) and designate a neotype for the species to facilitate subsequent revisionary work.Ĭrayfish biodiversity is becoming increasingly imperiled by threats that include habitat loss and biological invasions ( Richman et al., 2015 Bland, 2017). We redescribe Lacunicambarus and the devil crayfish sensu stricto ( Lacunicambarus diogenes comb. Based on our results and on unique morphological and ecological characteristics, we split seven of the eight DCG species from Cambarus and elevate the subgenus Lacunicambarus to generic level to accommodate them. ![]() Our analyses place the DCG as sister to a clade consisting of taxa from Creaserinus Hobbs, 1973, Faxonius Ortmann, 1905, and Barbicambarus Hobbs, 1969. Seven of the eight species from the DCG form a well-supported, monophyletic group that is distinct from the remainder of what has traditionally been recognized as Cambarus. We tested the hypothesis that the DCG is monophyletic through phylogenetic analyses of mitochondrial DNA sequence data from multiple specimens of the eight DCG species and a broad sample of taxa representing approximately 70% of the species in what is currently recognized as Cambarus. This group, here called the devil crayfish group (DCG) because it includes the devil crayfish ( Cambarus diogenes Girard, 1852), has a confusing taxonomic history and is in need of revision to inform conservation assessments. We took a step towards increasing the taxonomic resolution of Cambaridae by investigating a group of primary burrowing crayfishes which were historically part of the Cambarus subgenera Lacunicambarus Hobbs, 1969 and Tubericambarus Jezerinac, 1993. The taxonomy of the family Cambaridae Hobbs, 1942 has historically been based on morphology, but recent studies using molecular phylogenetic techniques have revealed taxonomic inconsistencies, including a polyphyletic Cambarus Erichson, 1846. ![]() As North American crayfish biodiversity becomes increasingly imperiled, the ambiguous nature of the current taxonomic framework can impede conservation efforts.
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