10 Works

Reassessment of Chirita umbrophila (Gesneriaceae) based on molecular and morphological evidence

Peng-Wei Li, James F. Smith, Debabrata Maity, Xi-Zuo Shi & Li-Hua Yang
Chirita umbrophila C.Y.Wu ex H.W.Li is a species endemic to Yunnan, China, and its exact systematic position remains a mystery since it was treated as a species with uncertain generic affiliation in the taxonomic revision of Chirita Buch.-Ham. ex Don in 1985. In the present study, the phylogenetic relationships between C. umbrophila and its allied species were inferred using two nuclear ribosomal DNA regions (ETS and ITS) and three chloroplast regions (rpl16, rps16, and trnL-F)....

Data from: Morphological conservatism of the Family Naticidae (Gastropoda) through time: potential causes and consequences

Neha Sharma, Subhronil Mondal, Shiladri Das, Kanishka Bose & Sandip Saha
Taxonomic status of several members of the Family Naticidae is extremely vague because of its simple shell morphology. Conventional taxonomic classification schemes suggest that most of the morphological characters tend to be homoplastic and exhibit convergence. Such morphological convergence complicates naticid taxonomy and makes it difficult to understand the evolutionary history of this group; several unrelated taxa are often misidentified as naticids, thereby exaggerating the actual diversity of this group. Here, we employ a standard...

Rhodocybe brunneoaurantiaca (sect. Rufrobrunnea, Entolomataceae): A new species from India

Arun Kumar Dutta, Genevieve M. Gates, Shovan Rakshit & Krishnendu Acharya
We describe a new species of Rhodocybe, R. brunneoaurantiaca, from West Bengal, India. Field photographs of the collected basidiocarps are provided and the new species is compared with its allied taxa based on morphological and molecular (nrITS and nrLSU sequence) data. Rhodocybe brunneoaurantiaca is characterized by clitocyboid basidiomata with a small (25–41 mm), infundibuliform, brownish orange to brown pileus; decurrent, brittle, greyish orange to light brown lamellae; a smooth light brown to brown stipe; ellipsoid...

Data from: Taxonomic assessment of opal phytoliths from grasses of deltaic West Bengal, India

Madhab Naskar & Subir Bera
In the present study, taxonomic potential of opal phytoliths was examined in grasses from lower Gangetic delta, West Bengal, India. The study revealed that finer classification of phytoliths can increase the efficacy of opal silica as taxonomic proxy by minimizing the influences of multiplicity and redundancy. 187 phytolith sub-morphotypes, categorized under 10 major groups were isolated from 110 grass species belonging to 45 genera, 21 sub-tribes, 13 tribes, and 7 subfamilies. Cluster and correspondence analyses...

Data from: Family Naticidae (Gastropoda) from the Upper Jurassic of Kutch, India and a critical reappraisal of taxonomy and time of origination of the family

Shiladri S. Das, Subhronil Mondal, Sandip Saha, Subhendu Bardhan & Ranita Saha
Because of mostly nondescript shells and frequent convergence, naticid taxonomy is in a state of flux. Inadequate preservation of naticid body fossils has further complicated the matter in determining the true affinity and the exact time of origination of the clade. As a result, a plethora of classificatory schemes of naticid phylogeny and times of origin has been proposed. In many previous studies, true naticid affinities of fossils have been sought based on single or...

Chemical evidence of preserved collagen in a 54-million-year-old fish vertebrae

Suryendu Dutta, Sumit Kumar, Hukam Singh, Mahasin Khan, Amalan Barai, Anuradha Tewari, Rajendra Rana, Subir Bera, Shamik Sen & Ashoke Sahni
Collagens are the most abundant protein in the animal kingdom. Collagens form the structural framework of connective tissues such as bones, tendons and skin and play important biomechanical role in supporting tissue functions. The preservation of collagen in deep time is a topic of intense debate. Here we provide indisputable evidence of the presence of collagen in Early Eocene fish vertebrae using online pyrolysis-comprehensive two dimensional gas chromatography-time-of-flight mass spectrometry and immunofluorescence studies. The presence...

Data from: Deconstruction of archaeal genome depict strategic consensus in core pathways coding sequence assembly

Ayon Pal, Rachana Banerjee, Uttam K. Mondal, Subhasis Mukhopadhyay & Asim K. Bothra
A comprehensive in silico analysis of 71 species representing the different taxonomic classes and physiological genre of the domain Archaea was performed. These organisms differed in their physiological attributes, particularly oxygen tolerance and energy metabolism. We explored the diversity and similarity in the codon usage pattern in the genes and genomes of these organisms, emphasizing on their core cellular pathways. Our thrust was to figure out whether there is any underlying similarity in the design...

Data from: Day/night upper thermal limits differ within Ectatomma ruidum ant colonies

Annika S. Nelson, Trey Scott, Maciej Barczyk, Terrence P. McGlynn, Arian Avalos, Elizabeth Clifton, Amlan Das, Andreia Figueiredo, Laura L. Figueroa, Mark Janowiecki, Sarah Pahlke, Jignasha D. Rana & Sean O'Donnell
In the tropics, daily temperature fluctuations can pose physiological challenges for ectothermic organisms, and upper thermal limits may affect foraging activity over the course of the day. Variation in upper thermal limits can occur among and within species, and for social insects such as ants, within colonies. Within colonies, upper thermal limits may differ among individuals or change for an individual throughout the day. Daytime foragers of the Neotropical ant Ectatomma ruidum have higher critical...

Altered food habits? Understanding the feeding preference of free-ranging Grey langurs within an urban settlement

Dishari Dasgupta, Arnab Banerjee, Rikita Kanrar, Debolina Banerjee, Shohini Mitra, Purnendu Sardar, Srijita Karmakar, Aparajita Bhattacharya, Swastika Ghosh, Pritha Bhattacharjee & Manabi Paul
Urbanization affects concurrent human-animal interactions as a result of altered resource availability and land use pattern, which leads to considerable ecological consequences. While some animals have lost their habitat due to urban encroachment, few of them managed to survive within the urban ecosystem by altering their natural behavioural patterns. The feeding repertoire of folivorous colobines, such as grey langur, largely consists of plant parts. However, these free-ranging langurs tend to be attuned to the processed...

Data from: Factors influencing herpetofauna abundance and diversity in a tropical agricultural landscape mosaic

Parthiba Basu & Deyatima Ghosh
Agricultural intensification and the associated factors, including land transformation, are among the major global threats affecting biodiversity especially herpetofauna. However, little information is available about how different factors shape herpetofauna species assemblages in agricultural landscape at different spatial scales from patch (125 – 250m) to the landscape (500 – 1000m). We assessed the diversity of amphibians and reptiles in areas under low and high degrees of agricultural intensification and explored different factors regulating diversity at...

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  • University of Calcutta
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