scholarly journals Thailandina and Neothailandina and their family Thailandinidae salvaged: a valid taxonomic group of peculiar Permian fusuline Foraminifera

2021 ◽  
pp. 1-6
Author(s):  
Katsumi Ueno
Keyword(s):  
Middle Permian ◽  
Taxonomic Group ◽  
New Genera ◽  
Taxonomic Note ◽  
Taxonomic Groups ◽  
Central Thailand

The fusuline genera Thailandina Toriyama and Kanmera, 1968 and Neothailandina Toriyama and Kanmera, 1968 were established by Toriyama and Kanmera (1968) based on material from the Khao Phlong Phrab section of the Permian Rat Buri Limestone in central Thailand that is currently assigned to the Khao Khad Formation of the Saraburi Group (Ueno and Charoentitirat, 2011). These fusuline genera are peculiar in having parachomata and replaced tests by secondary mineralization. Moreover, Neothailandina was described to have a test with transverse septula, considered to be characteristic for Neoschwagerinidae. Based on these remarkable test features, Toriyama and Kanmera (1968) newly introduced the subfamily Thailandininae to accommodate these two new genera and assigned it to the Neoschwagerinidae, despite the lack of septula in Thailandina. Later, Kobayashi et al. (2010) argued that Thailandina and Neothailandina are just a mixed grouping of several known genera of schwagerinids, verbeekinids, and neoschwagerinids that are too altered by recrystallization to be recognizable, and rejected the taxonomic validity of these two genera as well as Thailandininae. The Khao Phlong Phrab section represents one of the standard late Cisuralian−Guadalupian (late early−middle Permian) fusuline successions in the eastern Paleotethys (Zhang and Wang, 2018) and contains not only Thailandina and Neothailandina but also abundant schwagerinid, verbeekinid, and neoschwagerinid fusulines (Toriyama, 1975; Fig. 1). I investigated the original specimens described by Toriyama and Kanmera (1968) and Toriyama (1975) from the section that are housed in the Department of Earth and Planetary Sciences of Kyushu University, Japan. I found that most of the grounds for Kobayashi et al.'s (2010) arguments to regard the thailandinin genera as taxonomically invalid are not supported by observations on these specimens as explained in the account that follows. In this taxonomic note, I propose that Thailandina and Neothailandina, and their family Thailandinidae, should be retained as valid taxonomic groups.

scholarly journals The pitfalls of biodiversity proxies: Differences in richness patterns of birds, trees and understudied diversity across Amazonia

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Camila D. Ritter ◽  
Søren Faurby ◽  
Dominic J. Bennett ◽  
Luciano N. Naka ◽  
Hans ter Steege ◽  
...  
Keyword(s):  
Species Richness ◽  
Large Scale ◽  
Spatial Scales ◽  
Local Environment ◽  
Life Forms ◽  
Taxonomic Group ◽  
Diversity Gradients ◽  
Richness Patterns ◽  
Taxonomic Groups ◽  
Micro Organisms

AbstractMost knowledge on biodiversity derives from the study of charismatic macro-organisms, such as birds and trees. However, the diversity of micro-organisms constitutes the majority of all life forms on Earth. Here, we ask if the patterns of richness inferred for macro-organisms are similar for micro-organisms. For this, we barcoded samples of soil, litter and insects from four localities on a west-to-east transect across Amazonia. We quantified richness as Operational Taxonomic Units (OTUs) in those samples using three molecular markers. We then compared OTU richness with species richness of two relatively well-studied organism groups in Amazonia: trees and birds. We find that OTU richness shows a declining west-to-east diversity gradient that is in agreement with the species richness patterns documented here and previously for birds and trees. These results suggest that most taxonomic groups respond to the same overall diversity gradients at large spatial scales. However, our results show a different pattern of richness in relation to habitat types, suggesting that the idiosyncrasies of each taxonomic group and peculiarities of the local environment frequently override large-scale diversity gradients. Our findings caution against using the diversity distribution of one taxonomic group as an indication of patterns of richness across all groups.

Middle Permian (Roadian) gastropods from the Khao Khad Formation, Central Thailand: Implications for palaeogeography of the Indochina Terrane

Zootaxa ◽  
2020 ◽  
Vol 4766 (1) ◽  
pp. 1-47 ◽  
Author(s):  
CHATCHALERM KETWETSURIYA ◽  
BARAN KARAPUNAR ◽  
THASINEE CHAROENTITIRAT ◽  
ALEXANDER NÜTZEL
Keyword(s):  
New Species ◽  
Shallow Water ◽  
South China ◽  
New Genus ◽  
Middle Permian ◽  
Late Permian ◽  
Gastropod Species ◽  
Late Palaeozoic ◽  
Central Thailand

A new Permian gastropod assemblage from the Roadian (Middle Permian) Khao Khad Formation, Saraburi Group (Lopburi Province, Central Thailand) which is part of the Indochina Terrane, has yielded one of the most diverse Permian gastropod faunas known from Thailand. A total of 44 gastropod species belonging to 30 genera are described herein, including thirteen new species and one new genus. The new genus is Altotomaria. The new species are Bellerophon erawanensis, Biarmeaspira mazaevi, Apachella thailandensis, Gosseletina microstriata, Worthenia humiligrada, Altotomaria reticulata, Yunnania inflata, Trachydomia suwanneeae, Trachyspira eleganta, Heterosubulites longusapertura, Platyzona gradata, Trypanocochlea lopburiensis and Streptacis? khaokhadensis. Most of the species in the studied assemblage represent vetigastropods  (35.6%) and caenogastropods (26.7%) and most of the species belong to Late Palaeozoic cosmopolitan genera. The studied faunas come from shallow water carbonates that are rich in fusulinids, followed by gastropods, ostracods, bivalves and brachiopods. The gastropod assemblage from the Khao Khad Formation shares no species with the gastropod assemblages from other Permian formations in Thailand, the Tak Fa Limestone and the Ratburi Limestone. However, it is similar to the Late Permian gastropod faunas from South China of the Palaeo-Tethys, therefore it suggests that the Indochina Terrane was not located far from South China. 

Middle Permian Ostracods from Tak Fa Limestone, Phetchabun Province, Central Thailand

Geobios ◽  
2008 ◽  
Vol 41 (3) ◽  
pp. 341-353 ◽  
Author(s):  
Anisong Chitnarin ◽  
Sylvie Crasquin ◽  
Chongpan Chonglakmani ◽  
Jean Broutin ◽  
Paul Joseph Grote ◽  
...  
Keyword(s):  
Middle Permian ◽  
Central Thailand

Middle Permian productidine brachiopods from central Thailand (the Indochina Terrane) with paleobiogeographic implications

2009 ◽  
Vol 83 (5) ◽  
pp. 804-810 ◽  
Author(s):  
Masatoshi Sone ◽  
Chongpan Chonglakmani ◽  
Anisong Chitnarin
Keyword(s):  
New Species ◽  
Middle Permian ◽  
Western Margin ◽  
Central Thailand

Three productidine brachiopods ofHaydenella, Paraplicatifera,andCompressoproductusare recovered from the Tak Fa Formation (Wordian, Middle Permian) of the upper Saraburi Limestone Group exposed at Khao Wong of central Thailand (the western margin of the Indochina Terrane). The latter two genera are new to the Permian of Thailand, and the new speciesParaplicatifera thaicais proposed herewith. Some taxonomic and nomenclatural problems in relation to the three genera are discussed. The assemblage suggests endemism for a Middle Permian marine faunule of the Indochina Terrane.

scholarly journals Review of the plant bug genus Prolygus and related mirine taxa from eastern Asia (Hemiptera: Heteroptera: Miridae)

2018 ◽  
Vol 58 (2) ◽  
pp. 357-387 ◽  
Author(s):  
Tomohide Yasunaga ◽  
Michael D. Schwartz ◽  
Frédéric Chérot
Keyword(s):  
New Species ◽  
New Combinations ◽  
New Genera ◽  
Eastern Asia ◽  
Nomen Dubium ◽  
Central Thailand

Abstract The mirine plant bug genus Prolygus Carvalho, 1987 (Hemiptera: Heteroptera: Miridae: Mirinae: Mirini) and superficially reminiscent taxa in eastern Asia (mainly in Japan, P. R. China and Taiwan) are reviewed. Four species in the region are now assigned to Prolygus. Three new genera, Anthophilolygus gen. nov., Miyamotolygus gen. nov. and Poppiolygus gen. nov., are proposed to accommodate Prolygus bakeri (Poppius, 1915), Neolygus rufilorum (Lu & Zheng, 2004) and Lygus bengalicus Reuter, 1885, respectively. Ten new combinations and three new synonymies are established: Apolygopsis eoa (Poppius, 1915) comb. nov. [transferred from Apolygus China, 1941]; A. fuhoshoensis (Poppius, 1915) comb. nov. [Apolygus]; A. nigra (Poppius, 1915) comb. nov. [Prolygus]; Anthophilolygus bakeri (Poppius, 1915) comb. nov. [Prolygus] = P. tainanensis (Poppius, 1915) syn. nov.; Micromimetus rubrotinctus (Carvalho, 1956) comb. nov. [Lygus sensu lato]; Miyamotolygus bui (Lu & Zheng, 2004) comb. nov. [Neolygus Knight, 1917]; M. pictus (Lu & Zheng, 2004) comb. nov. [Neolygus]; M. rufilorum (Lu & Zheng, 2004) comb. nov. [Neolygus]; Poppiolygus bengalicus (Reuter, 1885) comb. nov. [Lygus sensu lato] = Prolygus kirkaldyi (Poppius, 1915) syn. nov.; Prolygus disciger (Poppius, 1915) comb. nov. [Neolygus]; P. palauensis (Carvalho, 1956) comb. nov. [Lygus sensu lato]; P. nigriclavus (Poppius, 1915) = Neolygus nigroscutellaris (Lu & Zheng, 2004) syn. nov. Two additional new species, Anthophilolygus alaneylesi sp. nov. (central Thailand) and Micromimetus sunweni sp. nov. (Lanyu Island, Taiwan), are also described. The lectotype is designated for Lygus bengalicus Reuter. Lygus sacchari Matsumura, 1910 is regarded as nomen dubium.

DNA metabarcode choice and design

2018 ◽  
Author(s):  
Pierre Taberlet ◽  
Aurélie Bonin ◽  
Lucie Zinger ◽  
Eric Coissac
Keyword(s):  
In Silico ◽  
Taxonomic Group ◽  
Taxonomic Resolution ◽  
Software Suite ◽  
Resolution Power ◽  
Wide Range ◽  
Dna Metabarcoding ◽  
Primer Annealing ◽  
Taxonomic Groups ◽  
The Ideal

Chapter “DNA metabarcode choice and design” develops the properties of the ideal metabarcode in a given context, including conservation of the primer annealing regions and resolution power across the target taxonomic group of interest. It also highlights the experimental constraints influencing the choice of a metabarcode in practice. A detailed tutorial illustrates how to design and test metabarcoding primers in silico with the programs ecoPrimers, ecoPCR, and the software suite OBITools. Command lines and example files are provided to design and test universal metabarcoding primers for Bacteria. Chapter 2 also gives statistics about the taxonomic resolution and primer conservation of more than 60 metabarcodes available for DNA metabarcoding analysis of a wide range of taxonomic groups.

What We Do and Don’t Know

2016 ◽  
Author(s):  
Andrew P. Hendry
Keyword(s):  
Evolutionary Dynamics ◽  
Theoretical Models ◽  
Taxonomic Group ◽  
Laboratory Studies ◽  
Darwin's Finches ◽  
Darwin’S Finches ◽  
Taxonomic Groups ◽  
The Relationship

This chapter describes the scope and limitation of what people know about eco-evolutionary dynamics. What they are striving to explain is the relationship between ecology and evolution, seeking to elucidate these relationships for a specific taxonomic group in a specific environment, such as Darwin's finches in Galapagos. In such cases, scholars need detailed studies of that particular group in that particular environment, ideally supplemented with theoretical models and laboratory studies that help to elucidate mechanisms. Alternatively, one might seek to discover generalities of relationships between ecology and evolution that transcend specific groups and environments. Ultimately, the chapter argues that no matter the goal, scholars need detailed studies of specific taxonomic groups in specific environments.

On taxonomic membership

Paleobiology ◽  
2011 ◽  
Vol 37 (3) ◽  
pp. 519-536 ◽  
Author(s):  
Bruce H. Wilkinson
Keyword(s):  
Adaptive Radiation ◽  
Taxonomic Group ◽  
Plate Model ◽  
Model Yield ◽  
Taxonomic Groups

Taxonomic membership frequencies exhibit distributions in which groups with few numbers of subtaxa are much more common in a clade than those with more subtaxa. Here, a “broken plate” model is developed to describe such taxonomic memberships; some higher taxonomic group (the plate) is randomly subdivided into intermediate taxonomic units (plate fragments), whose sizes are dependent on the number of taxonomic subunits that they each contain. Theoretical distributions of membership frequencies produced by this model yield a superior fit to data from both modern and fossil groups, as illustrated by classifications for primarily fossil brachiopods and entirely modern mammals. The nature of these distributions is consistent with the contention that Linnaean membership frequencies result from the random partitioning of taxonomic/morphologic space. Moreover, numbers of taxa contained within hierarchically equivalent groups are unrelated, as are membership numbers at taxonomically higher and lower levels of consideration. Agreement between observed taxonomic memberships and those anticipated from the random partitioning of diversity as described by the “broken plate” model bears directly on a number of fundamental questions including the significance of extreme polytypy and inferred causes of adaptive radiation within many taxonomic groups.

New Permian polyplacophora (Mollusca) from Malaysia

2000 ◽  
Vol 74 (4) ◽  
pp. 571-574 ◽  
Author(s):  
Richard D. Hoare
Keyword(s):  
Middle Permian ◽  
New Genera ◽  
The Family

Extraordinarily large, thick shelled polyplacophorans occur in the Permian limestone in the province of Perak, Malaysia. Three new genera and species are proposed: Hadrochiton pileus, Pyknochiton lunatus, and Kraterochiton magnificus. The occurrence of K. magnificus extends the range of the family Acutichitonidae into the Middle Permian.

DNA homology, phage-typing, and cross-nodulation studies of rhizobia infecting Galega species

1983 ◽  
Vol 29 (7) ◽  
pp. 781-789 ◽  
Author(s):  
Krishna Lindström ◽  
B. D. W. Jarvis ◽  
P. E. Lindström ◽  
J. J. Patel
Keyword(s):  
Host Plants ◽  
Taxonomic Status ◽  
Phage Typing ◽  
Taxonomic Group ◽  
Dna Homology ◽  
Fast Growing ◽  
The Mean ◽  
Taxonomic Groups

The taxonomic status of Rhizobium nodulating Galega sp. is poorly defined. Earlier reports suggest that the rhizobia infecting G. officinalis should be included in the R. leguminosarum species or in the "fast-growing lupin – cowpea complex." Therefore organisms nodulating G. orientalis and G. officinalis were studied using cross nodulation, DNA homology, and phage typing. No cross-nodulation relationship between the Galega rhizobia and rhizobial strains from the major taxonomic groups was found. The mean relative DNA homology of 10 strains of Rhizobium nodulating Galega with reference DNA from strain HAMBI 540, which forms effective nodules on G. orientalis, was 77 ± 9%, compared with 19 ± 6% for 20 strains from other host plants. The Galega rhizobia formed a unique phage-typing group, not related to the major groups of fast growers, in agreement with the DNA homology and cross-nodulation results. These data indicate that the Galega rhizobia form a specific taxonomic group within the genus Rhizobium.

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