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Krantzolaspina Datta & Bhattacharjee 1989
No full textGenus Krantzolaspina Datta & Bhattacharjee, 1989 Krantzolaspina Datta & Bhattacharjee, 1989: 411. Type species Krantzolaspina rebatti Datta & Bhattacharjee, 1989. by original designationPublished as part of Hajizadeh, Jalil, 2022, Review of the Iranian Parholaspidid mites (Acari: Mesostigmata) with a key to the species, pp. 229-240 in Zootaxa 5178 (3) on page 232, DOI: 10.11646/zootaxa.5178.3.2, http://zenodo.org/record/702611
Hyattolaspina hiteni Datta & Bhattacharjee 1991
No full text77. Hyattolaspina hiteni Datta & Bhattacharjee, 1991 Hyattolaspina hiteni Datta & Bhattacharjee, 1991: 717. Type locality and habitat: India, Assam, Jorhat, soil and litter. Type depository: Not stated. Notes: Hyattolaspina hiteni is described as having 77 pairs of setae on the dorsal shield, on the basis of a single specimen.Published as part of Quintero-Gutiérrez, Edwin Javier & Halliday, Bruce, 2021, Review of the mite family Parholaspididae Evans, 1956 (Acari: Mesostigmata), pp. 401-459 in Zootaxa 5005 (4) on page 424, DOI: 10.11646/zootaxa.5005.4.1, http://zenodo.org/record/514192
Asystasia venui Anant Kumar, G. Krishna & Av. Bhattacharjee 2023, sp. nov.
No full textAsystasia venui Anant Kumar, G. Krishna & Av. Bhattacharjee sp. nov. FIGURES 2 & 3 Type:— INDIA. West Bengal, Howrah, Acharya Jagdish Chandra Bose Indian Botanic Garden, along bank of Janardanam Lake, 11.3 m, 22.55856° E & 88.29227° N, 20.11.2019, Anant Kumar, Gopal Krishna & Avishek Bhattacharjee 86184 (Holotype CAL, CAL0000033886; isotype CAL, CAL0000033887!). Diagnosis:— Asystasia venui is morphologically allied to A. atroviridis Anderson (1867: 526), but differs in having smaller calyx lobes (vs. longer calyx lobes); papillose ovary (vs. glandular hairy ovary); glabrous style throughout (vs. style pubescent basally); densely glandular pubescent capsules (vs. glabrous capsules). Description:—Erect or decumbent herbs, 30−60 cm high; stem purplish red, branched, quadrangular, sulcate, ribbed after drying, rooting at nodes on lower portion, pubescent when young, then glabrescent when old except for nodes. Leaves opposite, decussate, petiolate or uppermost pair sessile; petioles (0−) 0.5−8 cm long, sulcate, pubescent; lamina elliptic-ovate to elliptic-lanceolate, uppermost pair ovate to broadly ovate, smaller in size, 1.4−10 × 0.9−4.4 cm, chartaceous, base unequal, rounded, subcordate, attenuate, or decurrent onto petiole when young, margin entire, apex shortly acuminate, pubescent and green above, tuberculate, glabrous and whitish beneath, veins camptodromous, midvein prominent, impressed above, prominent below, pubescent, lateral veins 5−7 pairs, otherwise same as mid vein. Inflorescences terminal, condensed racemes, 1–4 cm long, 4−12-flowered, pubescent. Flowers ca. 2 cm across; pedicels slender, 1−1.2 cm long, pubescent. Bracts triangular, 1.2–1.5 mm long, apex acuminate, margin ciliate persistent; bracteoles ovate-lanceolate, 0.5–0.7 mm long, apex acute, margin ciliate, persistent. Calyx 5-lobed, pubescent and glandular-hairy outside, glabrous inside; tube 1–1.5 mm long; lobes linear-lanceolate, 3−3.5 mm long, apex acute. Corolla infundibuliform, ventricose, white, with a light violet-purple blotch on the middle lobe of lower lip, glandular-hairy outside, glabrous inside; tube 2–2.3 cm long, base cylindrical for 1.5–1.7 cm long, throat 5–6 mm long; lobes 5, elliptic-ovate, 5−7 × 4–4.5 mm, apex obtuse. Stamens 4, didynamous, inserted at base of throat, slightly exserted; filaments white, slender, shorter pair 5−5.5 mm long, longer pair 8−8.5 mm long, connate at the base in pairs, glabrous; anthers white with a vertical violet-black band on the sides, oblong, 1.2–1.5 cm long, spurred at base, connective beyond the anther cells, glabrous. Ovary green, oblong or columnar, compressed, 1.2−1.5 mm long, papillose, basally surrounded by fleshy, dull white, nectariferous disc, 2-celled; ovules 2 in each cell; style white, filiform, 2.4–2.6 cm long, glabrous; stigma shortly 2-lobed, smooth. Capsules green, clavate, compressed, 1.4–2.2 cm long, dehiscent, densely glandular hairy. Seeds 4, suborbicular, flattened, ca. 3 mm across, tuberculate, rugose, dentate along margins, borne on ca. 2 mm long, hook-like retinacula. Phenology:—Flowering and fruiting from September to December. Habitat: — The new species grows along lakes in shady area at an elevation of about 10 m. The association includes Rivina humilis L., Ruellia tuberosa L., Cardiospermum halicacabum L., Mikania micrantha Kunth and Plumbago zeylanica L. and grasses etc. Distribution:—The species is distributed in Howrah, West Bengal, India so far. Etymology:—The new species is named after Dr Potharaju Venu, Former Senior Scientist of Botanical Survey of India, for his significant contribution to the taxonomy of Indian Acanthaceae. Notes:— The Indian species of the genus can be categorized in two groups on the basis of shape of corolla tube, i.e. Group 1 comprises three species Asystasia atroviridis Anderson (1867: 526), A. neesiana (Wallich 1830: 73) Nees (1832: 89), A. venui Anant Kumar, G. Krishna & Av. Bhattacharjee sp. nov. having cylindrical, shortly funnelshaped corolla tube upwards, and Group 2 having 10 species A. chelonoides Nees (1832: 89), A. crispata Bentham (1852: 647), A. dalzelliana Santapau (1948: 276), A. gangetica (Linnaeus 1756: 3) Anderson (1860: 235), A. indica H.J. Chowdhery & Av. Bhattacharjee (2006: 211), A. macrocarpa Nees (1832: 89), A. mysorensis (Roth 1821: 303) Anderson (1867: 524), A. pusilla C.B. Clarke (1889: 55), A. travancorica Beddome (1872: 39), and A. variabilis (Nees 1847: 165) Trimen (1895: 324) with tubular-ventricose corolla tube (FIGURE 1). Out of these, five species are endemic to India, e.g., A. crispata, A. dalzelliana, A. indica, A. pusilla, and A. travancorica. Lindau (1895) erected a new genus Asystasiella Lindau (1895: 326) to accommodate the species of Group one with two species, viz. A. neesiana and A. atroviridis, and it was considered to be different from Asystasia by having a narrow cylindric corolla tube and stachel pollen (spheroidal with spines). Ensermu et al. (1992) discussed the delimitation of the genus based on pollen morphology. Since, the genus Asystasia encompasses considerable variation in inflorescence form, corolla morphology, and pollen type, therefore, the genus Asystasiella was included within Asystasia (Manzitto-Tripp et al. 2022). The generic circumscription of Asystasia, Asystasiella, Mackaya and other related genera should be delimitated by molecular phylogenetic study along with pollen morphology. Das (1939: 408) incorrectly transferred these three species from Asystasia to Mackaya as M. atroviridis (Anderson 1867: 526) Das (1939: 448), M. macrocarpa (Nees 1832: 89) Das (1939: 447), and M. neesiana (Wallich 1830: 73) Das (1939: 447), respectively. However, the genus Mackaya is characterized by two fertile stamens without spurs and with two staminodes, while Asystasia has all four fertile stamens with spur at the base of anthers. Deng and Wu (2009: 308) stated that these three species were quite different from Mackaya in having four stamens and they preferred to place them in Asystasia rather than in Mackaya. Based on the above mentioned reasons the new species fits with Asystasia instead of Mackaya and hence, we are describing it here under Asystasia. The new species was wrongly identified as Asystasia chelonoides Nees by Chowdhery and Pandey (2007). However, it can be easily distinguished from Asystasia chelonoides by its long tubular-cylindrical corolla and densely flowered racemes. Comparison of diagnostic characters of the new species with its most allied species is provided in detail in Table 1. Additional specimens examined (Paratypes):— INDIA. West Bangal: Acharya Jagdish Chandra Bose Indian Botanic Garden, along bank of Janardanam Lake, 10 m, 22.55847° E & 88.29214° N, 23.11.2020, Anant Kumar, Gopal Krishna & Avishek Bhattacharjee 86185 (CAL); Acharya Jagdish Chandra Bose Indian Botanic Garden, along bank of Janardanam Lake, 11 m, 22.55862° E & 88.29233° N, 20.11.2018, Anant Kumar, Gopal Krishna & Avishek Bhattacharjee 81601 (CAL); Acharya Jagdish Chandra Bose Indian Botanic Garden, Division 9, 12 m, 22.55746° E & 88.29357° N, 23.09.2010, Avishek Bhattacharjee 72736 (CAL).Published as part of Kumar, Anant, Krishna, Gopal & Bhattacharjee, Avishek, 2023, Asystasia venui (Justicieae: Acanthaceae): A new species from West Bengal, India, pp. 239-247 in Phytotaxa 600 (4) on pages 241-244, DOI: 10.11646/phytotaxa.600.4.3, http://zenodo.org/record/809394
Fig. 1 in On the status of some species of Cheirostylis Blume (Orchidaceae) from India
No full textFig. 1. – Comparison plate: 'Cheirostylis chinensis var. glabra Bhaumik & M. K. Pathak'. A. Labellum; B. Petal; C. Column with anther-cap – Cheirostylis moniliformis (Griff.) Seidenf.; D-E. Labellum; F. Petal; G. Column – 'Cheirostylis seidenfadeniana C. S. Kumar & F. N. Rasm.'; H. Labellum – Cheirostylis parvifolia Lindl.; I-J. Labellum. [A-C: after BHAUMIK & PATHAK, 2006; D, F-G: A. Bhattacharjee 34819 A, CL; E: A. Bhattacharjee 34819 B, CAL; H: after SATHISH KUMR & RASMUSSEN, 1987; I: Sathish Kumar s.n., TBGT, spirit; J: A. Bhattacharjee 38142 A, CAL]Published as part of Bhattacharjee, Avishek, 2012, On the status of some species of Cheirostylis Blume (Orchidaceae) from India, pp. 31-35 in Candollea 67 (1) on page 33, DOI: 10.15553/c2012v671a3, http://zenodo.org/record/570865
A measure of data collapse for scaling
Get PDFData collapse is a way of establishing scaling and extracting associated exponents in problems showing self-similar or self-affine characteristics as, for example, in equilibrium or non-equilibrium phase transitions, in critical phases, in dynamics of complex systems and many others. We propose a measure to quantify the nature of data collapse. Via a minimization of this measure, the exponents and their error-bars can be obtained. The procedure is illustrated by considering finite-size-scaling near phase transitions and quite strikingly recovering the exact exponents
A Simple Test for the Absence of Covariate Dependence in Hazard Regression Models
Get PDFThis paper extends commonly used tests for equality of hazard rates in a two-sample or k-sample setup to a situation where the covariate under study is continuous. In other words, we test the hypothesis that the conditional hazard rate is the same for all covariate values, against the omnibus alternative as well as more specific alternatives, when the covariate is continuous. The tests developed are particularly useful for
detecting trend in the underlying conditional hazard rates or changepoint trend alternatives. Asymptotic distribution of the test statistics are established and small sample properties of the tests are studied. An application to the e¤ect of aggregate Q on corporate failure in the UK shows evidence of trend in the covariate e¤ect, whereas a Cox regression model failed to detect evidence of any covariate effect. Finally, we discuss an
important extension to testing for proportionality of hazards in the presence of individual level frailty with arbitrary distribution
Helicase on DNA: a phase coexistence based mechanism
Get PDFWe propose a phase coexistence based mechanism for activity of helicases, ubiquitous enzymes that unwind double stranded DNA. The helicase-DNA complex constitutes a fixed-stretch ensemble that entails the coexistence of domains of zipped and unzipped phases of DNA, separated by a domain wall. The motor action of the helicase leads to a change in the position of the fixed constraint thereby shifting the domain wall on dsDNA. We associate this off-equilibrium domain wall motion with the unzipping activity of the helicase. We show that this proposal gives a clear and consistent explanation of the main observed features of helicases
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
FIGURE 1. Gastrochilus pseudocalceolaris S. Dey, L in Gastrochilus pseudocalceolaris, a new species of epiphytic orchid from India
No full textFIGURE 1. Gastrochilus pseudocalceolaris S. Dey, L. Phom, Av. Bhattacharjee, Moaakum & K. Eshuo. A–B. Photograph of plant in natural habitat; C. Habit.Published as part of Dey, Santanu, Phom, Limamanen, Bhattacharjee, Avishek & Eshuo, Kazhuhrii, 2022, Gastrochilus pseudocalceolaris, a new species of epiphytic orchid from India, pp. 295-300 in Phytotaxa 574 (4) on page 296, DOI: 10.11646/phytotaxa.574.4.5, http://zenodo.org/record/738910
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