Taxonomic Studies on the Family Sinopteridaceae and the Genus Ctenitopsis (Tectariaceae) from Hainan Island, China

2003 ◽  
pp. 143-151 ◽  
Author(s):  
Gang-Min Zhang ◽  
Shi-Yong Dong ◽  
Xian-Chun Zhang ◽  
Shu-Gang Lu
Keyword(s):  
Hainan Island ◽  
The Family ◽  
Taxonomic Studies

Taxonomic studies on Archigetes Leuckart, 1878 (Cestoda: Caryophyllaeidae)

Parasitology ◽  
1965 ◽  
Vol 55 (3) ◽  
pp. 439-451 ◽  
Author(s):  
C. R. Keneedy
Keyword(s):  
Life History ◽  
Experimental Work ◽  
Nature Conservancy ◽  
The Family ◽  
Single Genus ◽  
Biological Characters ◽  
Taxonomic Studies ◽  
Relationship Of ◽  
Recent Experimental Work ◽  
The Relationship

Recent experimental work has indicated that species of Archigetes are capable of infecting and maturing in fishes in addition to tubificids.The genus Archigetes is re-defined on the basis of morphological and biological characters, with particular emphasis on recent life history studies. All species capable of neotenic development have been re-united in a single genus.A description of all species of Archigetes together with a key for their identification are included. New synonomies are discussed.The relationship of Archigetes to other genera of the family is briefly considered, and it is concluded that it forms the terminal stage in a series showing the attainment of neotenic development.I wish to thank Professor R. J. Pumphrey in whose Department the work was carried out, and Dr J. C. Chubb for advice and help in the preparation of this manuscript. I am also grateful to Professor K. Berg and Dr R. L. Calentine for the loan of specimens. The work was carried out during the tenure of a Nature Conservancy Research Studentship.

A remarkable new genus and species of Hansenauropodidae (Myriapoda, Pauropoda) from the seashore of Hainan Island, China

Zootaxa ◽  
2020 ◽  
Vol 4803 (2) ◽  
pp. 373-380
Author(s):  
YUN BU
Keyword(s):  
South China ◽  
New Genus ◽  
Hainan Island ◽  
First Record ◽  
New Genus And Species ◽  
Littoral Habitat ◽  
The Family ◽  
Marine Littoral

Psammopauropus macrospinus gen. et sp. n., a remarkable new genus and species of the pauropod family Hansenauropodidae is described from the marine littoral habitat of Hainan Island, South China. It has one pair of dorsal spines on the pygidium differentiated from seta a1, large globular seta st on pygidium, and globular distal setae on the tarsi by which Psammopauropus can be easily distinguished from all other genera of the family. In addition, the adaptive characters of the littoral pauropods are preliminary discussed. This is the first record of the family Hansenauropodidae from China. 

Analysis of non-morphometric morphological characters used in the taxonomy of the genus Pseudechiniscus (Tardigrada: Echiniscidae)

2019 ◽  
Author(s):  
Denis V Tumanov
Keyword(s):  
Species Delimitation ◽  
Taxonomic Status ◽  
Electron Microscopic Examination ◽  
Morphological Characters ◽  
Electron Microscopic ◽  
The Family ◽  
Scanning Electron Microscopic ◽  
Claw Morphology ◽  
Taxonomic Studies ◽  
A New Species

Abstract Pseudechiniscus, the second-largest genus of the family Echiniscidae (Tardigrada: Heterotardigrada: Echiniscoidea), is notoriously difficult for taxonomic studies. In this study, I performed a morphological analysis of a new species from Croatia, based on a light microscopic and scanning electron microscopic examination of 45 specimens from the same sample. Furthermore, I have summarized all available data on Pseudechiniscus species, including their original descriptions, and have analysed the following complexes of morphological characters: (1) arrangement and morphology of dorsal cuticular plates, (2) ventral sculpture, (3) morphology of cephalic, trunk and leg sensory organs and (4) claw morphology. The applicability of these characters in the taxonomy and their distribution in the genus are discussed. Some of the characters traditionally used for species delimitation were shown to be unsuitable and others in need of a thorough reinvestigation. The meaning of the old term ‘faceted’, commonly used but often misapplied, has been clarified, based on the initial definition. Several characters of the claw structure were suggested as potentially useful for species delimitation. The taxonomic status of several old forms and species was discussed.

Taxonomic Studies in the Family Pythiaceae

Mycologia ◽  
1931 ◽  
Vol 23 (4) ◽  
pp. 252-295
Author(s):  
C. P. Sideris
Keyword(s):  
The Family ◽  
Taxonomic Studies

Taxonomic Studies in the Family Pythiaceae II. Pythium

Mycologia ◽  
1932 ◽  
Vol 24 (1) ◽  
pp. 14-61 ◽  
Author(s):  
C. P. Sideris
Keyword(s):  
The Family ◽  
Taxonomic Studies

scholarly journals Prediction of whole-genome DNA–DNA similarity, determination of G+C content and phylogenetic analysis within the family Pasteurellaceae by multilocus sequence analysis (MLSA)

Microbiology ◽  
2006 ◽  
Vol 152 (9) ◽  
pp. 2537-2548 ◽  
Author(s):  
Peter Kuhnert ◽  
Bożena M. Korczak
Keyword(s):  
Dna Hybridization ◽  
Gold Standard ◽  
Classical Method ◽  
Gene Sequencing ◽  
Dna Relatedness ◽  
Experimental Variation ◽  
The Family ◽  
Taxonomic Studies ◽  
Species Descriptions

Genome predictions based on selected genes would be a very welcome approach for taxonomic studies, including DNA–DNA similarity, G+C content and representative phylogeny of bacteria. At present, DNA–DNA hybridizations are still considered the gold standard in species descriptions. However, this method is time-consuming and troublesome, and datasets can vary significantly between experiments as well as between laboratories. For the same reasons, full matrix hybridizations are rarely performed, weakening the significance of the results obtained. The authors established a universal sequencing approach for the three genes recN, rpoA and thdF for the Pasteurellaceae, and determined if the sequences could be used for predicting DNA–DNA relatedness within the family. The sequence-based similarity values calculated using a previously published formula proved most useful for species and genus separation, indicating that this method provides better resolution and no experimental variation compared to hybridization. By this method, cross-comparisons within the family over species and genus borders easily become possible. The three genes also serve as an indicator of the genome G+C content of a species. A mean divergence of around 1 % was observed from the classical method, which in itself has poor reproducibility. Finally, the three genes can be used alone or in combination with already-established 16S rRNA, rpoB and infB gene-sequencing strategies in a multisequence-based phylogeny for the family Pasteurellaceae. It is proposed to use the three sequences as a taxonomic tool, replacing DNA–DNA hybridization.

The rediscovery of Schaefer’s Spine-jawed Snake (Xenophidion schaeferi Günther & Manthey, 1995) (Serpentes, Xenophidiidae) from Peninsular Malaysia with notes on its variation and the first record of the genus from Sumatra, Indonesia 

Zootaxa ◽  
2018 ◽  
Vol 4441 (2) ◽  
pp. 366
Author(s):  
EVAN S.H. QUAH ◽  
L. LEE GRISMER ◽  
THOM JETTEN ◽  
PERRY L. Jr. WOOD ◽  
AURÉLIEN MIRALLES ◽  
...  
Keyword(s):  
Sequence Divergence ◽  
Field Research ◽  
First Record ◽  
Peninsular Malaysia ◽  
Colour Pattern ◽  
Molecular Analyses ◽  
The Family ◽  
West Sumatra ◽  
New Locations ◽  
Taxonomic Studies

The family Xenophidiidae is an extremely rare and little-known family of snakes that contains only two species, Xenophidion acanthognathus Günther & Manthey and X. schaeferi Günther & Manthey that are each known only from their holotypes. We report on the rediscovery of X. schaeferi from two new locations in southern Peninsular Malaysia. The new specimens differ markedly from the holotype of X. schaeferi in colour pattern and are more akin to the patterning of X. acanthognathus from Borneo. However, molecular analyses of one of the new specimens reveal that it only differs from the holotype of X. schaeferi by a minimum sequence divergence of 0.27%. An expanded description of the species based on these specimens is provided and phenotypic variation within the species is discussed. We also report the first record of the genus Xenophidion from West Sumatra, Indonesia. These sensational discoveries continue to underscore the fact that southern Peninsular Malaysia and upland areas of Southeast Asia in general still harbour unrealized herpetological diversity and are still in need of field research-based taxonomic studies. 

Taxonomic Studies in the Family Pythiaceae: I. Nematosporangium

Mycologia ◽  
1931 ◽  
Vol 23 (4) ◽  
pp. 252 ◽  
Author(s):  
C. P. Sideris
Keyword(s):  
The Family ◽  
Taxonomic Studies
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