scholarly journals Two new species of freshwater crabs of the genera Eosamon Yeo & Ng, 2007 and Indochinamon Yeo & Ng, 2007 (Crustacea, Brachyura, Potamidae) from southern Yunnan, China

ZooKeys ◽  
2020 ◽  
Vol 980 ◽  
pp. 1-21
Author(s):  
Zewei Zhang ◽  
Da Pan ◽  
Xiyang Hao ◽  
Hongying Sun
Keyword(s):  
New Species ◽  
16S Rdna ◽  
New Taxa ◽  
Molecular Analyses ◽  
Systematic Status ◽  
Freshwater Crabs ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Two New Species ◽  
Mitochondrial 16S Rdna

Two new species of potamid crabs, Eosamon daiaesp. nov. and Indochinamon malipoensesp. nov. are described from the Sino-Burmese border, southwestern Yunnan and from the Sino-Vietnamese border, southeastern Yunnan, China. The two new species can be distinguished from their closest congeners by several characters, among which is the form of the first gonopod structures. Molecular analyses based on partial mitochondrial 16S rDNA sequences also support the systematic status of these new taxa.

Two new species of the freshwater-crab genus Demanietta Bott, 1966 (Decapoda: Brachyura: Potamidae) from southern Myanmar

2020 ◽  
Author(s):  
Bo-Yang Shi ◽  
Xiao-Yong Chen ◽  
Hong-Ying Sun
Keyword(s):  
New Species ◽  
16S Rdna ◽  
New Taxa ◽  
Molecular Analysis ◽  
Systematic Position ◽  
Freshwater Crab ◽  
Two New Species ◽  
Mitochondrial 16S Rdna

Abstract We describe two new species of the freshwater-crab genus Demanietta  Bott, 1966 from Tanintharyi (Tenasserim) division, southern Myanmar (Burma), Demanietta liui  sp. nov. and Demanietta lenya  sp. nov.  Demanietta liui  sp. nov. is morphologically most similar to D. thagatensis  Rathbun, 1904 and D. khirikhan  Yeo, Naiyanetr & Ng, 1999; D. lenya  sp. nov. appears close to D. manii  Rathbun, 1904, D. merguensis  Bott, 1966, and D. nakhonsi  Yeo, Naiyanetr & Ng, 1999. The two new species are easily distinguished from their most similar congeners in the shape of the external orbital tooth, epibranchial tooth, and male first gonopod. Molecular analysis based on partial mitochondrial 16S rDNA also supports the systematic position of the new taxa.

A new long-legged terrestrial freshwater crab, Calcipotamon puglabrum gen. nov. et sp. nov. (Crustacea: Decapoda: Potamidae), from Hainan Island, China

Zootaxa ◽  
2020 ◽  
Vol 4766 (3) ◽  
pp. 447-456 ◽  
Author(s):  
CHAO HUANG ◽  
SHENG-ZHUO HUANG ◽  
ZHI-XIN SHEN
Keyword(s):  
New Species ◽  
16S Rdna ◽  
Molecular Analysis ◽  
New Genus ◽  
Hainan Island ◽  
Freshwater Crab ◽  
General Biology ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Mitochondrial 16S Rdna

A new genus and new species of terrestrial freshwater crab, Calcipotamon puglabrum gen. nov. et sp. nov., is described from the limestone forests of Changjiang, Hainan Island, China, based on morphology and mitochondrial 16S rDNA sequences. The new genus is closest to Neotiwaripotamon Dai & Naiyanetr, 1994, and Tiwaripotamon Bott, 1970, but differs in a combination of carapace, third maxilliped, ambulatory leg and male gonopod characters. Molecular analysis shows that the new genus is closely related with but not clustered within other Hainan potamid genera. Notes on the general biology of this new species are also provided. 

Descriptions of a new species of Minpotamon Dai & Türkay, 1997, and a monotypic new genus of aquatic freshwater crab (Brachyura, Potamidae) from eastern Guangdong, China

Crustaceana ◽  
2020 ◽  
Vol 93 (11-12) ◽  
pp. 1295-1313
Author(s):  
Si-Ying Mao ◽  
Chao Huang
Keyword(s):  
New Species ◽  
Genetic Distance ◽  
16S Rdna ◽  
New Genus ◽  
Freshwater Crab ◽  
Unique Combination ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Mitochondrial 16S Rdna ◽  
A New Species

Abstract A new genus new species of freshwater crab and a new Minpotamon Dai & Türkay, 1997 species are described from eastern Guangdong, China, based on morphology and mitochondrial 16S rDNA sequences. The new genus, Teoswamon gen. nov., is established for T. scolasticum sp. nov., which resembles species from several other genera from Guangdong, but its unique combination of carapace, male gonopod and female vulvae characters set it apart from others. Minpotamon kityang sp. nov. is almost identical with Minpotamon nasicum (Dai, Chen, Song, Fan, Lin & Zeng, 1979) externally, but differs drastically in the male gonopod morphology. Molecular analysis supports the current taxonomic treatments. Teoswamon scolasticum sp. nov. forms its own lineage closely related to Huananpotamon Dai & Ng, 1994. Minpotamon kityang sp. nov. clusters with Minpotamon nasicum, but their genetic distance is of an interspecific level.

scholarly journals Ornithodoros quilinensis sp. nov. (Acari, Argasidae), a new tick species from the Chacoan region in Argentina

2012 ◽  
Vol 57 (3) ◽  
Author(s):  
José Venzal ◽  
Santiago Nava ◽  
Atilio Mangold ◽  
Mariano Mastropaolo ◽  
Gustavo Casás ◽  
...  
Keyword(s):  
New Species ◽  
16S Rdna ◽  
Tick Species ◽  
Dorsal Plate ◽  
Dental Formula ◽  
Base Length ◽  
Small Rodents ◽  
Rdna Sequences ◽  
Haller's Organ ◽  
16S Rdna Sequences

AbstractOrnithodoros quilinensis sp. nov. (Acari: Argasidae) is described from larvae collected on the small rodents Graomys centralis (Cricetidae: Sigmodontinae) in Argentina. The diagnostic characters for this new species are a combination of small size (520–540 μm), a dorsal plate oval in shape with a length of approximately 200 μm, 14 pairs of dorsal setae, hypostome short and narrower at the base (length from Ph1 to apex 133 μm (120–141)) with dental formula 2/2 and apex blunt, and the capsule of the Haller’s organ irregular in shape and without reticulations. The analysis of the 16S rDNA sequences available for the genus Ornithodoros indicate that, phylogenetically, O. quilinensis represents an independent lineage only related to a Bolivian tick species of the genus Ornithodoros yet not formally described.

Cryptic diversity in Engaeus Erichson, Geocharax Clark and Gramastacus Riek (Decapoda : Parastacidae) revealed by mitochondrial 16S rDNA sequences

2007 ◽  
Vol 21 (6) ◽  
pp. 569 ◽  
Author(s):  
Mark B. Schultz ◽  
Sarah A. Smith ◽  
Alastair M. M. Richardson ◽  
Pierre Horwitz ◽  
Keith A. Crandall ◽  
...  
Keyword(s):  
16S Rdna ◽  
Sequence Data ◽  
Species Boundaries ◽  
Freshwater Crayfish ◽  
Nucleotide Sequence Data ◽  
Rdna Sequences ◽  
South Wales ◽  
16S Rdna Sequences ◽  
Mitochondrial 16S Rdna ◽  
Australian Freshwater

Nucleotide sequence data from the mitochondrial 16S rDNA region were utilised to investigate phylogenetic relationships and species boundaries among Australian freshwater crayfish belonging to the genera Engaeus Erichson, 1846, Geocharax Clark, 1936 and Gramastacus Riek, 1972. Geocharax and Gramastacus were found to be monophyletic genera but one species currently assigned to Engaeus may belong to another genus. Relationships between the three existing genera were not resolved. Analysis of species boundaries within Geocharax suggests that there are an additional two species in this genus, and our analysis of Gramastacus indicates that undescribed populations from central New South Wales may comprise a second species. The data provide at least one instance of a taxon crossing the Great Dividing Range and provide confirmation of previously proposed hypotheses seeking to explain trans-Bass Strait distributions of species.

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