scholarly journals Disentangling the divergence and cladogenesis in the freshwater crab species (Potamonautidae:Potamonautes perlatus sensu lato) in the Cape Fold Mountains, South Africa, with the description of two novel cryptic lineages

2014 ◽  
Vol 170 (2) ◽  
pp. 310-332 ◽  
Author(s):  
Ethel E. Phiri ◽  
Savel R. Daniels
Keyword(s):  
South Africa ◽  
Freshwater Crab ◽  
Crab Species

Genetic and morphological evidence for a new mountain-living freshwater crab species (Decapoda : Potamonautidae : Potamonautes) from the Western Cape province of South Africa

2016 ◽  
Vol 30 (3) ◽  
pp. 219 ◽  
Author(s):  
Louisa E. Wood ◽  
Savel R. Daniels
Keyword(s):  
South Africa ◽  
Morphological Evidence ◽  
Western Cape ◽  
Freshwater Crab ◽  
Crab Species ◽  
Western Cape Province ◽  
Haplotype Networks ◽  
Clade B ◽  
Cape Peninsula ◽  
Mountain Habitats

Recent studies in southern Africa have revealed a wealth of novel freshwater crab species in high mountainous regions. In the present study, phylogeographic affinities between two sister mountain-living freshwater crab species (Potamonautes brincki and P. parvicorpus) were examined for novel lineages. Seventy-six crab specimens were collected throughout the Western Cape Province of South Africa and sequenced for the COI locus. Evolutionary relationships were analysed using Bayesian inference, maximum likelihood and maximum parsimony, a haplotype network and analyses of molecular variance (AMOVA). Results revealed three divergent clades. Clade A comprised specimens of P. brincki restricted to the Hottentots Holland; sister to which was Clade B from the Overberg, while Clade C comprised specimens of P. parvicorpus from the Cape Peninsula and adjacent interior. Haplotype networks and AMOVA provide evidence for the absence of gene flow whilst morphology of the male gonopods and the mandibular palp revealed subtle but consistent differences between the three clades. Since Clades A and C represent two described species, P. brincki and P. parvicorpus, respectively, Clade B is herein described as a new species, P. tuerkayi, sp. nov. These results highlight the importance of continued sampling of mountain habitats to document aquatic invertebrate diversity.

scholarly journals Surveys of Afrotemperate forests yields two new freshwater crabs (Decapoda: Potamonautidae: Potamonautes MacLeay, 1838) from South Africa

2021 ◽  
Vol 782 ◽  
pp. 82-107
Author(s):  
Savel R Daniels ◽  
Aaron Barnes ◽  
Hannes Marais ◽  
Gavin Gouws
Keyword(s):  
South Africa ◽  
New Species ◽  
Novel Species ◽  
Sister Species ◽  
Freshwater Crab ◽  
Crab Species ◽  
Ecological Data ◽  
Mountainous Regions ◽  
Freshwater Crabs ◽  
Two New Species

Sampling of remote inland aquatic habitats in South Africa has constantly been yielding novel endemic freshwater crab species (Potamonautes MacLeay,1838). During the present study, we report on the discovery and description of two new freshwater crab species (Potamonautes baziya sp. nov., and P. mariepskoppie sp. nov.) from Afrotemperate forested mountain regions in the Eastern Cape and Mpumalanga provinces of South Africa, respectively. Phylogenetic evidence derived from DNA sequence data of three partial mitochondrial loci (12S rRNA, 16S rRNA and cytochrome oxidase subunit one, COI) corroborates the evolutionary distinction of the two novel species. In addition, morphological and ecological data for the two new species further delineate their evolutionary distinction from congeneric sister species. A comparison of the taxonomically important gonopods 1 and 2 and carapace features among the sister species and other known freshwater crabs of South Africa was further used to provide evidence for the distinction of the two novel species. The discovery of two new species suggest that remote mountainous areas or unsampled regions in South Africa likely harbor several novel species, reiterating a call to document aquatic inland biodiversity in forested and mountainous regions of the country.

scholarly journals Offspring production in three freshwater crab species (Brachyura: Pseudothelphusidae) from the Amazon region and Central America

2010 ◽  
Vol 27 (6) ◽  
pp. 965-972 ◽  
Author(s):  
Ingo S. Wehrtmann ◽  
Célio Magalhães ◽  
Patricio Hernáez ◽  
Fernando L. Mantelatto
Keyword(s):  
Central America ◽  
Amazon Region ◽  
Freshwater Crab ◽  
Crab Species ◽  
Offspring Production

Hidden in the highlands: the description and phylogenetic position of a novel endemic freshwater crab species (Potamonautidae : Potamonautes) from Zimbabwe

2013 ◽  
Vol 27 (5) ◽  
pp. 530 ◽  
Author(s):  
Ethel E. Phiri ◽  
Savel R. Daniels
Keyword(s):  
Southern Africa ◽  
Sequence Data ◽  
Phylogenetic Position ◽  
12S Rrna ◽  
Mountain Range ◽  
Freshwater Crab ◽  
Crab Species ◽  
Mountainous Regions ◽  
Freshwater Crabs ◽  
Mtdna Sequence

A recent sampling endeavour of freshwater crabs along the high-lying streams of the Nyanga mountain range in Mutare (Eastern Highlands, Zimbabwe) yielded a morphologically distinct, as yet undescribed species. The novel Zimbabwean species is compared to the 16 described species from southern Africa based on mtDNA sequence data derived from three partial gene sequences (12S rRNA, 16S rRNA and COI). The new Zimbabwean species was found to be a sister taxon to Potamonautes mulanjeensis. These two species are morphologically and genetically easily differentiated. The new species is described as Potamonautes mutareensis, sp. nov. and is compared morphologically to the known freshwater crab species of southern Africa. A dichotomous key to the four described freshwater crab species that occur in Zimbabwe is also provided. Our results suggest that species diversity and endemism of freshwater decapods and other habitat specialists is likely to be high in unsampled mountainous regions.

scholarly journals A review of the freshwater crabs of Turkey (Brachyura, Potamidae)

2018 ◽  
Vol 26 (3) ◽  
pp. 151-158
Author(s):  
Muzaffer Mustafa Harlıoğlu ◽  
Ardavan Farhadi ◽  
Ayşe Gül Harlıoğlu
Keyword(s):  
Species Distribution ◽  
Present Status ◽  
Anthropogenic Impacts ◽  
Conservation Status ◽  
Management Strategies ◽  
Decision Makers ◽  
Freshwater Crab ◽  
Distribution Map ◽  
Crab Species ◽  
Freshwater Crabs

Abstract The present status of freshwater crabs (Decapoda, Brachyura) in Turkey is reviewed in this study, with the purpose of identifying the exact number of species, their conservation status, and their distribution. In previous records, it was reported that Turkey has nine freshwater crab species belonging to the genus Potamon: Potamon bileki Pretzmann, 1971, P. ibericum (Bieberstein, 1809), P. hueceste Pretzmann, 1962, P. persicum Pretzmann, 1962, P. magnum Pretzmann, 1962, P. potamios (Olivier, 1804), P. setiger Rathbun, 1904, P. rhodium Parisi, 1913, and P. mesopotamicum Brandis, Storch & Türkay, 1998. However, there was no detailed information on species distribution in Turkey. This review is intended to update the distribution of species in the country, and it revealed that populations of three more freshwater crab species (P. karpathos, P. fluviatile and P. hippocrate) also occur; thus, there are currently 12 freshwater crab species in Turkey. In addition, this review provides a distribution map and identifies possible threats to each species. This review can serve decision makers in the development of management strategies to better protect the environments of these species that are facing growing anthropogenic impacts.

scholarly journals Notes on the taxonomy of Potamonautes obesus (A Milne-Edwards, 1868) and Potamonautes calcaratus (Gordon, 1929) (Brachyura: Potamoidea: Potamonautidae) from eastern and southern Africa

Zootaxa ◽  
2004 ◽  
Vol 418 (1) ◽  
pp. 1 ◽  
Author(s):  
SADIE K. REED ◽  
NEIL CUMBERLIDGE
Keyword(s):  
South Africa ◽  
Southern Africa ◽  
Large Series ◽  
Type Material ◽  
Valid Species ◽  
Freshwater Crab ◽  
East African ◽  
Related Taxon ◽  
Eastern And Southern Africa ◽  
De Man

The East African freshwater crab Potamonautes obesus (A Milne-Edwards, 1868) (family Potamonautidae) is redescribed from a large series of specimens from Tanzania and Somalia, and Potamon (Potamonautes) bottegoi de Man, 1898 is judged to be a junior objective synonym of P. obesus. The related taxon, Potamonautes calcaratus (Gordon, 1929) from Mozambique and South Africa, is recognised here as a valid species and is redescribed from type material. The distributions of P. obesus and P. calcaratus are described and discussed.

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