On the taxonomic status of the harvest mouse Micromys minutus (Rodentia: Muridae) from Vietnam

Zootaxa ◽  
2009 ◽  
Vol 2199 (1) ◽  
pp. 58-68 ◽  
Author(s):  
ALEXEI V. ABRAMOV ◽  
ILYA G. MESCHERSKY ◽  
VIATCHESLAV V. ROZHNOV
Keyword(s):  
South China ◽  
Southern China ◽  
Taxonomic Status ◽  
The Body ◽  
Morphological Data ◽  
Long Tail ◽  
North Vietnam ◽  
Distinct Phylogenetic Lineage ◽  
Harvest Mouse ◽  
Micromys Minutus

The taxonomic status of the harvest mouse Micromys minutus from Vietnam is re-evaluated. The mtDNA analysis shows that the harvest mice from Lao Cai Province of northern Vietnam belongs to a distinct phylogenetic lineage, previously known only from a haplotype from Chengdu, Sichuan Province, southern China (Yasuda et al. 2005). The mtDNA analysis shows a strong genetic divergence among this lineage and all the other known haplotypes of Micromys minutus (11.68% for cytochrome b gene sequences). Canonical discriminant analysis of cranial and dental data, as well as of some external characters, also separate the Vietnam – South China group (also including an Indian specimen) from other Palaearctic populations. The skull of southern populations is relatively large, with a longer and broader palatine. The dorsal pelage of the Vietnamese specimens is grey, tinged with brown in comparison with the red-brown dorsal colouration sharply contrasting with the white underside in the majority of Euro-Siberian adults. The harvest mice of the Vietnam – South China group are distinguished from the typical European ones by their rather long tail that is about 120% of the body length (82 to 95% in the Palaearctic populations). Both genetic and morphological data suggest the existence of a second Micromys species, occurring at least in North Vietnam and South China. The available name for this species is Micromys erythrotis (Blyth, 1856).

Aspidistra austroyunnanensis (Asparagaceae), a new species from southern Yunnan, China

Phytotaxa ◽  
2018 ◽  
Vol 356 (3) ◽  
pp. 233 ◽  
Author(s):  
LEI CAI ◽  
SHUAI PENG ◽  
JING TIAN ◽  
ZHI-LING DAO ◽  
NENG WEI ◽  
...  
Keyword(s):  
New Species ◽  
South China ◽  
Southern China ◽  
Species Level ◽  
Morphological Variations ◽  
East And Southeast Asia ◽  
New Varieties ◽  
North Vietnam ◽  
A New Species ◽  
High Diversity

The genus Aspidistra Ker-Gawler (1822: 628) (Asparagaceae), endemic to East and Southeast Asia, is mainly distributed in southern China and northern Vietnam (Li et al. 2004, Tillich 2006, 2008, 2014, Tillich & Averyanov 2008, Vislobokov et al. 2016). Species of this genus usually set flowers on the ground and hidden in leaves cluster. Flowers of Aspidistra show extremely high diversity in morphological variations. Furthermore, the scentless trait and dull color of flowers of most species make them inconspicuous under forest (Tillich 2005). Relatively, their leaves have lower diversity and taxonomic value. Although individuals of Aspidistra are common under forests in south China and north Vietnam, but it is very difficult to identify them at species level in the field. In recent decades, some scientists have been focusing on this genus and observed the species not only in the field but also in cultivation (Tillich 2005). These combined observations revealed many new species and the number of species known had been dramatically increasing since the 1980s (Lang et al. 1999, Liang & Tamura 2000, Tillich 2008). Just in 2017, at least 11 new taxa including 9 new species and 2 new varieties of Aspidistra were described (Averyanov & Tillich 2017, Averyanov et al. 2017, Lý & Tillich 2017, Lý et al. 2017, Nguyen et al. 2017, Vislobokov et al. 2017, Wang et al. 2017, Xu et al. 2017, Zou et al. 2017). Hitherto, there are around 170 species names of Aspidistra have been accepted based on Lý et al. (2017) and recently published species.

scholarly journals Taxonomic reexamination of Portulaca boninensis (Portulacaceae) in the Bonin (Ogasawara) Islands of Japan using molecular and morphological data

Phytotaxa ◽  
2015 ◽  
Vol 217 (3) ◽  
pp. 279 ◽  
Author(s):  
Goro KOKUBUGATA ◽  
Hidetoshi Kato ◽  
DUILIO IAMONICO ◽  
Hana Umemoto ◽  
Takuro Ito ◽  
...  
Keyword(s):  
Endemic Species ◽  
Migratory Birds ◽  
Southern China ◽  
Phylogenetic Analyses ◽  
Taxonomic Status ◽  
Morphological Data ◽  
Bonin Islands ◽  
Ogasawara Islands ◽  
Sea Current ◽  
Molecular Phylogenetic

Molecular phylogenetic analyses, morphological observations, and nomenclatural studies were carried out to investigate the taxonomic status of Portulaca boninensis, endemic species from the Bonin (Ogasawara) Islands (Japan). The results addressed controversy between the widely naturalized P. boninensis and P. pilosa, indicating that they are phylogenetically and morphologically distinct. Furthermore, P. boninensis was showed to be conspecific to P. psammotropha which is until now recorded in southern China, Taiwan, and the northern Philippines, but not in the Ryukyus. The name of P. psammotropha was lectotypified on a specimen preserved at K. Based on phylogeography, P. psammotropha likely migrated to the Oceanic Bonin Islands oversea by sea-current dispersal or by exo- and/or end ozoochory through migratory birds without passing through Ryukyus.

Scanning electron microscopy of freeze-fractured prescapular lymph node of caprine

1984 ◽  
Vol 42 ◽  
pp. 244-245
Author(s):  
O. Faroon ◽  
F. Al-Bagdadi ◽  
T. G. Snider ◽  
C. Titkemeyer
Keyword(s):  
Lymph Node ◽  
Lymph Nodes ◽  
Lymphatic System ◽  
Three Dimensional ◽  
Meat Products ◽  
The Body ◽  
Morphological Data ◽  
The World ◽  
Cellular Constituent ◽  
Scanning Electron

The lymphatic system is very important in the immunological activities of the body. Clinicians confirm the diagnosis of infectious diseases by palpating the involved cutaneous lymph node for changes in size, heat, and consistency. Clinical pathologists diagnose systemic diseases through biopsies of superficial lymph nodes. In many parts of the world the goat is considered as an important source of milk and meat products.The lymphatic system has been studied extensively. These studies lack precise information on the natural morphology of the lymph nodes and their vascular and cellular constituent. This is due to using improper technique for such studies. A few studies used the SEM, conducted by cutting the lymph node with a blade. The morphological data collected by this method are artificial and do not reflect the normal three dimensional surface of the examined area of the lymph node. SEM has been used to study the lymph vessels and lymph nodes of different animals. No information on the cutaneous lymph nodes of the goat has ever been collected using the scanning electron microscope.

scholarly journals Combination of nuclear and mitochondrial markers as a useful tool to identify Ctenophthalmus species and subspecies (Siphonaptera: Ctenophthalmidae)

2021 ◽  
Author(s):  
Antonio Zurita ◽  
Cristina Cutillas
Keyword(s):  
Taxonomic Status ◽  
Molecular Study ◽  
Molecular Data ◽  
Point Of View ◽  
Morphological Data ◽  
Molecular Approach ◽  
Nuclear Marker ◽  
Mitochondrial Markers ◽  
Morphological Criteria ◽  
Mtdna Markers

AbstractCtenophthalmus is considered the largest genus within the Order Siphonaptera. From a morphological point of view, only males of this genus can be identified at species and subspecies levels using morphological keys, whereas there are no morphological criteria in order to classify females at these taxonomical levels. Furthermore, the amount of available molecular and phylogenetic data for this genus is quite scarce so far. The main objective of this work was to assess the utility of the combination of nuclear and mitochondrial markers with respect to their ability to differentiate among different subspecies within the Ctenophthalmus genus. With this purpose, we carried out a comparative morphological and molecular study of three different subspecies (Ctenophthalmus baeticus arvernus, Ctenophthalmus nobilis dobyi, and Ctenophthalmus andorrensis catalaniensis) in order to clarify and discuss its taxonomic status. In addition, our study complemented the molecular data previously provided for Ctenophthalmus baeticus boisseauorum and Ctenophthalmus apertus allani subspecies. We sequenced five different molecular markers: EF1-α, ITS1, ITS2, cox1, and cytb. Our results confirmed that morphological data by themselves are not able to discriminate among Ctenophthalmus female taxa; however, the combination of the nuclear marker EF1-α together with mtDNA markers cytb and cox1 constituted a useful taxonomical and phylogenetic tool to solve this issue. Based on these results, we consider that the use of this molecular approach should be gradually used within Ctenophthalmus genus in order to complement its classical taxonomy and clarifying the complex taxonomy of other congeneric species of fleas.

A preliminary study on sediment records of possible typhoon in the northern South China Sea during the past 6500 yr

The Holocene ◽  
2021 ◽  
pp. 095968362110032
Author(s):  
Pingyuan Li ◽  
Mingkun Li ◽  
Huayang Gan ◽  
Zhen Xia
Keyword(s):  
South China Sea ◽  
South China ◽  
Southern China ◽  
Northern South China Sea ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Human Beings ◽  
China Sea ◽  
The Pearl River ◽  
China Coast

Typhoon is an important meteorological phenomenon that affects the living and development of human beings on the southern China coast. However, there is still lack of clarity in the paleo-typhoon history and its influence on the evolution of the ancient human settlement environment since the mid-Holocene. Here, we identify six typhoon-like deposits from a core retrieved from the northern South China Sea shelf, close to the Pearl River Estuary, based on accelerated mass spectrometry 14C dating, grain size, and geochemistry. The sand fractions, CaO, Sr, SiO2/TiO2, and SiO2/Al2O3 were used to indicate the typhoon-like deposits. Results show that the ages with high-frequency typhoons are present ~200–300 cal yr BP, ~800–1000 cal yr BP, ~1500–1700 cal yr BP, ~2000–2100 cal yr BP, ~2400–2500 cal yr BP, and ~2700–3000 cal yr BP. Our results are comparable to the records from adjacent regions. Significantly, the vast tides occurred in the duration of ~2700–3000 cal yr BP in southern China, which probably caused the ancestors’ migration to the inland. Further studies are needed to deeply study the paleo-typhoon history in the southern China coast to verify our results.

scholarly journals Redescription of Paradiplozoon hemiculteri (Monogenea, Diplozoidae) from the type host Hemiculter leucisculus, with neotype designation

Parasite ◽  
2018 ◽  
Vol 25 ◽  
pp. 4 ◽  
Author(s):  
Dagmar Jirsová ◽  
Xuejuan Ding ◽  
Kristína Civáňová ◽  
Eliška Jirounková ◽  
Jana Ilgová ◽  
...  
Keyword(s):  
Southern China ◽  
Phylogenetic Analyses ◽  
Posterior Part ◽  
Original Description ◽  
Molecular Data ◽  
The Body ◽  
Type Host ◽  
Hemiculter Leucisculus ◽  
Morphological And Molecular Data ◽  
Median Plate

Paradiplozoon hemiculteri (Ling, 1973), a member of the Diplozoidae, parasitizes the gills of Asian fish. Not only is the type material unavailable for this species, the original description was poor and somewhat conflicting, and adequate molecular data were not available. What is more, the available morphological and molecular data are inconsistent and fluctuate significantly. Here, we present a redescription of P. hemiculteri based on morphological and molecular data from new isolates collected from the type host, the sharpbelly Hemiculter leucisculus (Basilewsky, 1855), captured at the neotype locality (Shaoguan, Guangdong Province, southern China); a neotype for P. hemiculteri was designated from this collection. The length and width of the body, buccal suckers, pharynx, attachment clamps, sickle and the central hook handle were all measured and the shape of the anterior and posterior part of the median plate and anterior and posterior joining sclerites accurately documented. Phylogenetic analyses based on the sequences of the second rDNA internal transcribed spacer (ITS2) indicated that all new samples clustered together and differed clearly from sequences attributed to P. hemiculteri, which are deposited in GenBank. Our results confirm that P. hemiculteri is the only diplozoid that has demonstrably been found on the gills of H. leucisculus to date.

Description of a new species of Bush frog (Anura: Rhacophoridae: Raorchestes) from northwestern Yunnan, China

Zootaxa ◽  
2021 ◽  
Vol 4941 (2) ◽  
pp. 239-258
Author(s):  
YUN-HE WU ◽  
XIAO-LONG LIU ◽  
WEI GAO ◽  
YU-FAN WANG ◽  
YING-CHUN LI ◽  
...  
Keyword(s):  
New Species ◽  
Southern China ◽  
Field Work ◽  
The Body ◽  
Adult Males ◽  
The Past ◽  
Black Region ◽  
One New Species ◽  
A New Species ◽  
Northwestern Yunnan

Approximately half of the species in speciose genus Raorchestes were described during the past 10 years, yet only 11 species are known from Southeast Asia and southern China (SEA-SC), adjacent Himalayas, and northeastern India. Field work in northwestern Yunnan province, China resulted in the discovery of one new species in the genus based on morphological and molecular analyses. The new species is diagnosed by small size with 15.0–19.0 mm SVL in adult males (n=3); tongue pyriform, notched posteriorly; rudimentary webbing between toes; fingers and toes with narrow lateral dermal fringes; tibiotarsal articulation reaching anterior of the eye when hindlimb is stretched along the side of the body; relative finger lengths: I < II < IV < III, relative toe lengths: I < II < V < III < IV; inner metatarsal tubercle oval, outer metatarsal tubercle absent; finger discs and toe discs greyish or orange; flank near the crotch with a distinct black region between two creamy white patches, and the thigh having a similar black patch near the groin, proximal to another creamy white patch; a distinct “) (”-shaped dark marking on the back; male with external single subgular vocal sac; nuptial pad absent. A phylogenetic tree was reconstructed based on the mitochondrial genes for 16S rRNA and ND1. The results indicated that these individuals form a monophyletic group, and show high genetic divergence to their closest relatives within the genus (uncorrected p-distances > 3.2%) by distance of 16S comparable to the divergence between recognized Raorchestes species. This study further enriches the diversity of rhacophorids, especially in northwestern Yunnan. 

Cephalotrichella echinicola, sp. nov. (Palaeonemertea : Cephalotrichellidae), a new nemertean associated with sea urchins from Nha Trang Bay (South China Sea)

2019 ◽  
Author(s):  
Alexei V. Chernyshev ◽  
Neonila Polyakova ◽  
Temir A. Britayev ◽  
Olga A. Bratova ◽  
Elena S. Mekhova
Keyword(s):  
Phylogenetic Analysis ◽  
South China Sea ◽  
South China ◽  
Sea Urchins ◽  
Laser Scanning Microscopy ◽  
Morphological Data ◽  
28S Rrna ◽  
Gene Markers ◽  
China Sea ◽  
Nha Trang Bay

About 50 nemertean species have been reported to live in symbiotic relationships with other invertebrates, but only two hoplonemertean species are associated with echinoderms (starfish). The palaeonemertean Cephalotrichella echinicola, sp. nov. is described from samples collected in Nha Trang Bay, Vietnam, South China Sea. The species is the first known nemertean associated with sea urchins (Metalia sternalis and M. spatagus), living on both the oral and the aboral surfaces of the host and freely moving among its spines. The internal morphology of the new species is described based on histological sections and confocal laser scanning microscopy with phalloidin and antibody labelling. Sequences of three nuclear gene markers (18S rRNA, 28S rRNA, and histone H3) and two mitochondrial gene markers (16S rRNA and COI) were compared with those of other palaeonemertean species, and a phylogenetic analysis suggested that C. echinicola is closest to the free-living Cephalotrichella alba Gibson &amp; Sundberg, 1992. Both the morphological data and the phylogenetic analysis provide additional evidence for distinguishing the families Cephalotrichidae and Cephalotrichellidae and support the rejection of Cephalotrichella as a junior synonym of Cephalothrix. A new diagnosis of the genus Cephalotrichella is given. http://zoobank.org/urn:lsid:zoobank.org:pub:091B5D56-71B2-4F4C-9AD8-F666B4610DE2

scholarly journals Gracilaria phuquocensis sp. nov., a new flattened Gracilaria species (Gracilariales, Rhodophyta), previously recognized as G. mammillaris, from the southern coast of Vietnam

2020 ◽  
Author(s):  
HN Le ◽  
N Muangmai ◽  
S Kheauthong ◽  
Z Sun ◽  
Giuseppe Zuccarello
Keyword(s):  
New Species ◽  
South China Sea ◽  
South China ◽  
Taxonomic Status ◽  
Molecular Data ◽  
The South China Sea ◽  
The South ◽  
Western Atlantic ◽  
China Sea ◽  
Coast Of Vietnam

© 2019 Japanese Society of Phycology Flattened Gracilaria species are widely distributed along the coasts of the South China Sea with more than 20 species recorded. Within the South China Sea, Gracilaria mammillaris has only been reported from Vietnam, but this species is likely restricted to the western Atlantic. This study aimed to reevaluate the taxonomic status of Vietnamese specimens of ‘G. mammillaris’ using combined morphological and molecular data. Our data clearly indicated that Vietnamese specimens were morphologically and genetically distinct from authentic G. mammillaris from the western Atlantic, and also other described flat Gracilaria species. We, therefore, propose that specimens from Vietnam originally identified as G. mammillaris be designated as a new species, Gracilaria phuquocensis sp. nov. Morphologically, G. phuquocensis can be distinguished from other flat Gracilaria species by its small thallus size, narrower blades, many medullary layers, abundant basal nutritive filaments within mature cystocarps, and tetrasporangial nemathecium. Our rbcL sequence analyses showed that the new species was sister to Gracilaria rhodymenioides from Thailand, and these two species formed a clade with cylindrical Gracilaria species. Our study contributes to clarification of the taxonomic status of misidentified specimens attributed to the flattened Gracilaria species in the South China Sea.

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