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|Haloquadratum walsbyi||Sitta europaea caesia||Boletus calopus||♂Aphyocharax anisitsi|
|♀Brachypelma smithi||Hippopotamus amphibius||Euphorbia leuconeura||Sarcophaga sp. with Tipulidae|
Collaboration with ZooKeys
A collaboration between Wikispecies and ZooKeys has been announced. PhytoKeys also joined the collaboration in November 2010. Images of species from ZooKeys and PhytoKeys will be uploaded to Wikimedia Commons and used in Wikispecies.
Francesco Redi was an Italian entomologist, parasitologist and toxicologist, sometimes referred to as the "founder of experimental biology" and the "father of modern parasitology". Having a doctoral degree and in both medicine and philosophy from the University of Pisa at the age of 21, he worked in various cities of Italy.
Redi is best known for his series of experiments, published in 1668 as Esperienze Intorno alla Generazione degli Insetti ("Experiments on the Generation of Insects"), which is regarded as his masterpiece and a milestone in the history of modern science. The book is one of the first steps in refuting "spontaneous generation", a theory also known as "Aristotelian abiogenesis". At the time, prevailing theory was that maggots arose spontaneously from rotting meat, which Redi was able to disprove. In an experiment, He used samples of rotting meat that were either fully exposed to the air, partially exposed to the air, or not exposed to air at all. Redi showed that both fully and partially exposed rotting meat developed fly maggots, whereas rotting meat that was not exposed to air did not develop maggots. This discovery completely changed the way people viewed the decomposition of organisms and prompted further investigations into insect life cycles and into entomology in general. It is also an early example of forensic entomology.
In Esperienze Intorno alla Generazione degli Insetti Redi was the first to describe ectoparasites, such as lice (Phthiraptera), fleas (Siphonaptera), and some mites (Acari). His next treatise in 1684, titled Osservazioni intorno agli animali viventi che si trovano negli animali viventi ("Observations on Living Animals, that are in Living Animals") recorded the descriptions and the illustrations of more than 100 parasites. In it he also differentiates the earthworm (generally regarded as a helminth) and Ascaris lumbricoides, the human roundworm. An important innovation from the book is his experiments in chemotherapy in which he employed what is now called "scientific control", the basis of experimental design in modern biological research. Perhaps, his most significant observation was that parasites produce eggs and develop from them, which contradicted the prevailing opinion that they are produced spontaneously. Altogether he is known to have described some 180 species of parasites.See also: Distinguished authors of previous months.
Species of the month
Some facts on this antelope:
Head and body length: Between 108-146 cm.
Shoulder hight: Between 57-79 cm.
Weight: Males, about 41 kg.; females about 28 kg.
Range States: Kazakhstan, Mongolia, Russia, Turkmenistan and Uzbekistan.
Habitat: Open dry steppe grassland and semi-desert areas.
Surviving number: Estimated at 100,000-110,000.
Lifespan: 6 to 10 years.
Diet: Grasses, steppe lichens, herbs and shrubs.
Conservation status: Critically Endangered (IUCN 3.1).
First described: By the Swedish naturalist Linnaeus in 1766.
See also: Species of previous months
Endangered species of the month
Slender Samoana Tree Snail
Some facts about this species:
Habitat: Terrestrial. The snail has a preference for higher branches in trees and often drier ridges. However, it is also found in at least one wet valley of Tahiti.
Distribution: Endemic to French Polynesia, where the population is severely fragmented. Extant on Tahiti, Moorea and Raiatea, Society Islands. The species was one of few species of Partulids which was native in Bora Bora, where it is now extinct.
Threats: The carnivorous snail Euglandina rosea (introduced in the late 1980s) remains the principal threat.
Surviving number: Approximately 100 mature individuals, and decreasing.
Conservation status: Critically Endangered (IUCN 3.1).
First described: As Partula attenuata by William Harper Pease in Tryon, G.W. & Pilsbry, H.A. (1909) Manual of Conchology, Volume 20. Caecilioides, Clessula and Partulidae. Index to vols. XVI–XX. (2)20: 165, 263.
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