Friday, March 29, 2019

STD 1 MA PRAVESHPATRA BALAKO ANE VIDYALAXMI BOND NI MAHITI MOKALAVA BABAT

STD 1 MA PRAVESHPATRA BALAKO ANE VIDYALAXMI BOND NI MAHITI MOKALAVA BABAT 1973, English ornithologist Daniel T. Holyoak described some small parrot bones that he had discovered among a collection of broad-billed parrot (Lophopsittacus mauritianus) subfossils in the Zoology Museum of Cambridge University. These remains had been collected by French amateur naturalist Louis Etienne Thirioux in the early 20th century, who had found them in a cave on Le Pouce mountain, on the Mascarene Island of Mauritius. They were placed in the zoology museum by 1908. Apart from their size and robustness, Holyoak did not find the bones to be distinct from those of the Mascarene parrot genera Lophopsittacus, Mascarinus (the Mascarene parrot), Necropsittacus (the Rodrigues parrot), and Psittacula (which had two or three other species inhabiting the Mascarene Islands). Because of their similarities, Holyoak considered all these genera to be closely related
           Holyoak provisionally placed the new species in the same genus as the broad-billed parrot, naming it Lophopsittacus bensoni; the name honours English ornithologist Constantine W. Benson, for his work on birds from the Indian Ocean, and in classifying bird collections at Cambridge. Holyoak also mentioned the possibility that the remains could represent a small subspecies of Necropsittacus or a wide-beaked form of Mascarinus, but maintained that they were best considered as belonging to a distinct species. The holotype specimen is a mandibular symphysis, with the specimen number UMZC 577a. Other known remains include upper mandibles, a palatine bone, and tarsometatarsi.The species has since been excavated from the Mare aux Songes swamp on Mauritius, from which subfossils of most of the other endemic bird species have been identified as well
          Old, vague accounts of several different now-extinct Mascarene parrots have created much confusion for the scientists who subsequently examined them. In 1967, American ornithologist James Greenway speculated that 17th- and 18th-century reports of then-unidentified grey parrots on Mauritius referred to the broad-billed parrot.In 1987, English ecologist Anthony S. Cheke correlated the L. bensoni subfossils with the grey parrots reported from Mauritius and RĂ©union, which had previously been ignored, or considered references to broad-billed parrots.Further study of contemporary accounts indicates that the broad-billed parrot was not grey, but had multiple colours

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