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- Title
Cryptic and widespread: a recipe for taxonomic misidentification in a freshwater crab species (Decapoda: Potamonautidae: Potamonautes sidneyi) as evident from species delimitation methods.
- Authors
Daniels, Savel R; Busschau, Theo; Gullacksen, Graeme; Marais, Hannes; Gouws, Gavin; Barnes, Aaron
- Abstract
We examined the systematics of a ubiquitously distributed southern African freshwater crab, Potamonautes sidneyi s.l. species complex. Specimens were subjected to DNA sequence analyses of two mitochondrial loci (16S rRNA + COI). We applied three species delimitations methods (ASAP, bGMYC and bPTP) to test their utility in delineating species boundaries in Potamonautes and three additional Afrotropical genera (Liberonautes , Nesonautes and Seychellum). The combined mtDNA dataset retrieved five clades. Clade 1 comprised of P. barbarai , clade 2 comprised of specimens from the interior of the Great Karoo Basin, sister to P. sidneyi s.s. in clade 3. Clade 4 was confined to Eswatini and the Mpumalanga Province of South Africa, and sister to clade 5 that comprised P. danielsi. The three species delimitation methods either over- or underestimated the number of species. Phylogenetically, specimens from the Great Karoo Basin (clade 2) were equidistant to P. sidneyi s.s. and P. perlatus , while the Eswatini and Mpumalanga specimens (clade 4) were sister to P. danielsi. Clades 2 and 4 are herein described as P. karooensis sp. nov. and P. valles sp. nov. respectively.
- Subjects
SOUTH Africa; FRESHWATER crabs; PHYLOGEOGRAPHY; DNA sequencing; DECAPODA; NUMBERS of species; SPECIES
- Publication
Zoological Journal of the Linnean Society, 2023, Vol 197, Issue 4, p1005
- ISSN
0024-4082
- Publication type
Article
- DOI
10.1093/zoolinnean/zlac068