scholarly journals Utilizing integrative taxonomy uncovers a new stygobiotic Caridina species (Decapoda: Caridea: Atyidae) from Guizhou Province, China

2021 ◽  
Author(s):  
Shuo Feng ◽  
Qing-Hua Chen ◽  
Zhao-Liang Guo
Keyword(s):  
Abdominal Segment ◽  
Dna Analysis ◽  
Integrative Taxonomy ◽  
Critically Endangered ◽  
Guizhou Province ◽  
Mitochondrial Coi ◽  
Needed Information ◽  
Appendix Masculina ◽  
Unique Shape ◽  
Distribution And Ecology

Collecting much-needed information on the taxonomy, distribution, and ecology of cave-dwelling shrimp is the foundation for addressing urgent challenges in conservation biodiversity and these fragile ecosystems. Caridina unicolor sp. nov., a new atyid shrimp from an underground stream of Yaoshui Cave, Daqikong scenic area, Libo County, Guizhou Province, southwestern China is described based on morphology and DNA analysis (mitochondrial COI). Caridina unicolor sp. nov. differs from epigean congeners by the variable eye, ranging from reduced to blind; colorless body and appendages; the long stylocerite and sixth abdominal segment; and relatively large eggs. In comparison to other cave species, Caridina unicolor sp. nov. presents a long rostrum and stylocerite; the slender sixth abdominal segment; and the unique shape of appendix masculina. The data on the habitat, ecology, and the levels of threat are provided and suggest that it be categorized as Critically Endangered (CR).

scholarly journals Integrative taxonomy uncovers a new stygobiotic Caridina species (Decapoda, Caridea, Atyidae) from Guizhou Province, China

ZooKeys ◽  
2021 ◽  
Vol 1028 ◽  
pp. 29-47
Author(s):  
Shuo Feng ◽  
Qing-Hua Chen ◽  
Zhao-Liang Guo
Keyword(s):  
Abdominal Segment ◽  
Dna Analysis ◽  
Integrative Taxonomy ◽  
Guizhou Province ◽  
Mitochondrial Coi ◽  
Needed Information ◽  
Appendix Masculina ◽  
Unique Shape ◽  
Cave Ecosystems ◽  
Distribution And Ecology

Collecting much-needed information on the taxonomy, distribution, and ecology of cave-dwelling shrimp is vital for addressing the urgent challenges in conservation biodiversity in fragile cave ecosystems. Caridina incolorsp. nov., a new atyid shrimp from an underground stream of Yaoshui Cave, Daqikong scenic area, Libo County, Guizhou Province, southwestern China is described based on morphology and DNA analysis (mitochondrial COI). Caridina incolorsp. nov. differs from epigean congeners by its smaller eyes which range from reduced to completely blind; colorless body and appendages; long stylocerite and sixth abdominal segment; and relatively large eggs. In comparison to other cave species, Caridina incolorsp. nov. presents a long rostrum and stylocerite; slender sixth abdominal segment; and unique shape of the appendix masculina. Data on the habitat, ecology, and levels of threat are provided and suggest that it should be categorized as Critically Endangered (CR) under the current IUCN criteria.

scholarly journals Caridina sinanensis, a new species of stygobiotic atyid shrimp (Decapoda, Caridea, Atyidae) from a karst cave in the Guizhou Province, southwestern China

ZooKeys ◽  
2020 ◽  
Vol 1008 ◽  
pp. 17-35
Author(s):  
Da-Jian Xu ◽  
Deng-Xu Li ◽  
Xiao-Zhuang Zheng ◽  
Zhao-Liang Guo
Keyword(s):  
New Species ◽  
Guizhou Province ◽  
Southwestern China ◽  
Rrna Gene ◽  
16S Rrna Gene Sequences ◽  
Biodiversity Survey ◽  
Pigment Spot ◽  
Mitochondrial Coi ◽  
Appendix Masculina ◽  
A New Species

From a biodiversity survey of a subterranean habitat near Sinan County, Guizhou Province, southwestern China, a new atyid shrimp of the genus Caridina H. Milne Edwards, 1837, C. sinanensissp. nov. was discovered. The new species can be separated from other congeners based on a combination of characters including depigmentation in body and reduction of eyes, small pigment spot at the centre of the cornea, the shape of rostrum and the endopod of the 1st male pleopod, and the relatively longer appendix interna on the appendix masculina of the 2nd pleopod. Mitochondrial COI and 16S rRNA gene sequences also support the establishment of the new species. Information on the habitat, and the levels of threat are discussed to guide the conservation of C. sinanensissp. nov.

scholarly journals Looking at the Nudibranch Family Myrrhinidae (Gastropoda, Heterobranchia) from a Mitochondrial ‘2D Folding Structure’ Point of View

Life ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 583
Author(s):  
Giulia Furfaro ◽  
Paolo Mariottini
Keyword(s):  
16S Rrna ◽  
Phylogenetic Analyses ◽  
Integrative Taxonomy ◽  
Point Of View ◽  
Past Study ◽  
Mitochondrial Coi ◽  
The Past ◽  
Combining Data ◽  
Folding Structure ◽  
Comparison Of The Results

Integrative taxonomy is an evolving field of multidisciplinary studies often utilised to elucidate phylogenetic reconstructions that were poorly understood in the past. The systematics of many taxa have been resolved by combining data from different research approaches, i.e., molecular, ecological, behavioural, morphological and chemical. Regarding molecular analysis, there is currently a search for new genetic markers that could be diagnostic at different taxonomic levels and that can be added to the canonical ones. In marine Heterobranchia, the most widely used mitochondrial markers, COI and 16S, are usually analysed by comparing the primary sequence. The 16S rRNA molecule can be folded into a 2D secondary structure that has been poorly exploited in the past study of heterobranchs, despite 2D molecular analyses being sources of possible diagnostic characters. Comparison of the results from the phylogenetic analyses of a concatenated (the nuclear H3 and the mitochondrial COI and 16S markers) dataset (including 30 species belonging to eight accepted genera) and from the 2D folding structure analyses of the 16S rRNA from the type species of the genera investigated demonstrated the diagnostic power of this RNA molecule to reveal the systematics of four genera belonging to the family Myrrhinidae (Gastropoda, Heterobranchia). The “molecular morphological” approach to the 16S rRNA revealed to be a powerful tool to delimit at both species and genus taxonomic levels and to be a useful way of recovering information that is usually lost in phylogenetic analyses. While the validity of the genera Godiva, Hermissenda and Phyllodesmium are confirmed, a new genus is necessary and introduced for Dondice banyulensis, Nemesis gen. nov. and the monospecific genus Nanuca is here synonymised with Dondice, with Nanuca sebastiani transferred into Dondice as Dondice sebastiani comb. nov.

Curcuma papilionacea (Zingiberaceae), an unusual new species from southern Thailand

Phytotaxa ◽  
2020 ◽  
Vol 432 (1) ◽  
pp. 11-16
Author(s):  
SUTTHINUT SOONTHORNKALUMP ◽  
ANNOP ONGSAKUL ◽  
AUMDAH DOLAJI ◽  
JANA LEONG-ŠKORNIČKOVÁ
Keyword(s):  
New Species ◽  
Critically Endangered ◽  
Conservation Assessment ◽  
Iucn Conservation Assessment ◽  
Southern Thailand ◽  
Distribution And Ecology

Curcuma papilionacea, an unusual new species of Curcuma subgenus Hitcheniopsis (Zingiberaceae) is described and illustrated here. It is known only from Satun province in southern Thailand, and is easily distinguishable among all species of subgenus Hitcheniopsis by its inflorescence of green bracts and pea-like flowers with a small labellum and very prominent lateral staminodes. It also has prominently developed anther spurs, a character not yet recorded in this subgenus. It is compared to the four morphologically closest species which are Curcuma alismatifolia, C. harmandii, C. rhabdota and C. saraburiensis. A preliminary IUCN conservation assessment of Critically Endangered (CR), and notes on its distribution and ecology are also provided.

The first egg of Jerdon's courser Rhinoptilus bitorquatus and a review of the early records of this species

2014 ◽  
Vol 41 (1) ◽  
pp. 75-93 ◽  
Author(s):  
Alan G. Knox
Keyword(s):  
Twentieth Century ◽  
Population Size ◽  
Dna Analysis ◽  
Type Specimen ◽  
Critically Endangered ◽  
Grammar School ◽  
Restricted Area ◽  
Veterinary Surgeon ◽  
The University

For most of the twentieth century, Jerdon's courser (Rhinoptilus bitorquatus) was thought to be extinct until it was rediscovered in 1986. Since then, despite much research, the bird remains poorly known. A Critically Endangered southern Indian endemic, recorded from a restricted area of about 50 square kilometres, its nocturnal habits, infrequent vocalizations, scrub-jungle habitat and low population size make it difficult to observe. Almost nothing is known about its breeding or ecology. Its nest has never been seen by an ornithologist. The first known egg of the species was recently discovered in a collection at the University of Aberdeen and its identity confirmed by DNA analysis. It had been collected by Ernest Gilbert Meaton, a veterinary surgeon at the Kolar Gold Fields, east of Bangalore. He probably obtained it in 1917, within 100 km of Kolar. Meaton's egg collection was purchased by George Falconer Rose, a successful expatriate Scot working in Calcutta, and given to Aberdeen Grammar School in 1919. In the 1970s, the school gave the collection to the University of Aberdeen, where the egg was discovered in 2008. This paper collates and reviews the early records of Jerdon's courser and examines the provenance of the egg. The type specimen of the courser now appears to be lost, but five other specimens exist in collections.

scholarly journals Species detections in environmental DNA using metabarcoding: a useful tool in estuaries monitoring

2015 ◽  
Author(s):  
Adrián Mártinez-Marqués ◽  
Carlos Enrique Carleos ◽  
Eva García-Vazquez ◽  
Yaisel J. Borrell Pichs
Keyword(s):  
Dna Analysis ◽  
Anthropogenic Activities ◽  
Dna Barcode ◽  
Environmental Dna ◽  
Coi Gene ◽  
Universal Primers ◽  
Mitochondrial Coi ◽  
Mitochondrial Coi Gene ◽  
Cantabrian Coast ◽  
Taxonomic Groups

Estuaries are amongst the most productive habitats in Earth, producing more organic materia than forests, meadows or agricultural lands. In addition, estuaries exhibit high, and precious, biodiversity levels. In this study an environmental DNA analysis of the two most important estuaries in Asturias (Cantabrian Coast, north Iberia) in terms of food production (Ría del Eo and Ría de Villaviciosa) was carried out. The objective was to monitor aquatic biodiversity and also to detect alien species that can be associated with anthropogenic activities (e.g.: aquaculture). To achieve these objectives, a metabarcoding methodology based in NGS (next generation sequencing) and the mitochondrial COI gene as a DNA Barcode was used. Results showed that this methodology was useful to detect the presence of three different non-native genera (Crepidula, Lymnaea, Macrobrachium) that are probably parasitating species cultured in these estuaries. It is true that Metabarcoding has still unsolved problems such as the lack of 100% universal primers and paucity of referenced sequences for some taxonomic groups in the databases. However, it represents already a powerful tool to manage the resources of these important ecosystems and to guarantee their long-term sustainailibity.

scholarly journals Primulina flexusa sp. nov. (Gesneriaceae) from Guizhou Province, China

PhytoKeys ◽  
2020 ◽  
Vol 159 ◽  
pp. 61-69
Author(s):  
Tao Peng ◽  
Bo Pan ◽  
Stephen Maciejewski ◽  
Fang Wen
Keyword(s):  
New Species ◽  
Critically Endangered ◽  
Type Locality ◽  
Guizhou Province ◽  
Karst Area ◽  
Southwestern China ◽  
The Past ◽  
Limestone Hill ◽  
Iucn Criteria

The limestone regions of Yunnan-Guangxi-Guizhou in southern and southwestern China are regarded as some of biodiversity’s hotspots for China’s Gesneriaceae where numerous rare new species of Primulina have been, or are being, described over the past two decades. Primulina flexusa, a new lithophytic species of Gesneriaceae from a limestone hill in a Karst area, from Guizhou, China, is described here with color photographs. It is similar to P. curvituba, but can be easily distinguished by a combination of characteristics, especially in the shape and length of its capsule. We found only one population with approximately 100 mature individuals at the type locality. This new species is provisionally assessed as Critically Endangered [CR C1] by using IUCN criteria.

Eight new species of the fern genus Polystichum (subg. Haplopolystichum; Dryopteridaceae) from limestone caves in Guizhou, China

Phytotaxa ◽  
2019 ◽  
Vol 404 (6) ◽  
pp. 209
Author(s):  
LI-BING ZHANG ◽  
YI-FAN DUAN ◽  
MATTHIAS KROPF
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Critically Endangered ◽  
Guizhou Province ◽  
Southwestern China ◽  
Fern Species ◽  
Iucn Red List Criteria

Eight new fern species of Polystichum subg. Haplopolystichum sect. Haplopolystichum (Dryopteridaceae) are described and illustrated from Guizhou Province, southwestern China. These eight species include P. anshunense, P. asperrimum, P. confusum, P. kropfii, P. libingii, P. macrodon, P. perditum, and P. yifanii. Each of these eight species was discovered from only 1–2 limestone caves showing extremely narrow distributions. Therefore, all are classified as Critically Endangered (CR) following IUCN Red List criteria.

A new species of palaemonid prawn Macrobrachium ramae sp.nov. (Malacostraca:Decapoda:Palaemonidae) from Rupnarayana River, West Bengal, India with its molecular profiles

Zootaxa ◽  
2021 ◽  
Vol 4952 (3) ◽  
pp. 540-550
Author(s):  
MITALI DAS ◽  
PRITI RANJAN PAHARI ◽  
TANMAY BHATTACHARYA
Keyword(s):  
New Species ◽  
Molecular Characterization ◽  
West Bengal ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Mitochondrial Coi ◽  
Appendix Masculina ◽  
Molecular Profiles ◽  
A New Species ◽  
Scanning Electron

A new species Macrobrachium ramae is described from Rupnarayana river, West Bengal, India along with its molecular characterization and Scanning electron microscopy. The species shares certain characters with M.gurudeve, M.jayasreei, M.kunjuramani and M.saengphani but differs remarkably from these species in the structure and shape of rostrum, telson, appendix masculina and in the size of the proximal segment of the antennular peduncle. Molecular characterization and phylogenetic analysis of M.ramae with mitochondrial COI and 16S rRNA genes reinforce the morphological conclusion and supports the view that it is a new species. 

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