by Benoit GILLES The trophic chains of ecosystems such as those found in small ponds are structured in several levels. The first group consists of the so-called primary organisms, constituting phytoplankton, producing their energy from minerals and light energy through the photosynthesis process. At the base of the food chain, these organisms serve as food…
by Benoit GILLES There are five species of rhinoceros, two in Africa: the White Rhinoceros (Ceratotherium simum) and the Black Rhinoceros (Diceros bicornis), and three in Asia: the Indian Rhinoceros (Rhinoceros unicornis), the Java Rhinoceros (Rhinoceros sondaicus) and the rhinoceros Sumatra (Dicerorhinus sumatrensis). These species are all in the process of degradation due to the…
Thyreophora cynophila Thyreophora cynophila had not been observed < 160 years ago than the orange head of a fly specimen ! This species of the family Piophilidae (photos below), described in 1798 by the botanist and entomologist G.W.F. Panzer (1755-1829), had last been observed near Paris in 1840. Its presence had previously been recorded in…
Micromalthus debilis, an Archostemate (smallest suborder of beetles – 50 species) of North American origin does not seem to have evolved for several tens of millions of years : it is the only known living representative of the Micromalthidae family. Although the species displays archaic morphological characters, its development cycle is both complex and singular,…
By Sylvain HUGEL The Mogoplistidae are a basal family of crickets, most of whose limbs are covered with flat, scaly bristles. None of them are capable of flying. A genus of Mogoplistidae is particularly diverse: the genus Ornebius which includes more than 100 species, mainly distributed in the Indo-Malaysian, Australian and Oceanian regions. Some species…
Nombre de vues : 2 523 The ability of insects to colonize and adapt to extreme environments and inhospitable habitats is increasingly surprising. The discovery of a beetle from the depths in the Krubera-Voronja underground galleries of the Arabika massif (Caucasus) bears witness to this. This carabic, Duvalius abyssimus, was collected at a depth of nearly…
Nombre de vues : 5 615 Entomology sometimes takes unexpected paths. This is what is defined as »scarabiasis » (or »canthariasis » from the Greek kantharos scarab and -iasis disease), a situation that sees the intestine temporarily squatté by small coprophagous beetles (which feed on faecal matter). This rare pathology, one suspects, is observed in a punctual way in the…
Nombre de vues : 2 124 A large number of animal species have developed the ability to estimate and determine object distance and depth of field by combining and analyzing visual information from the image perceived by each of their eyes from a different angle: this is stereo vision (also called 3D). This faculty gives them…
Nombre de vues : 1 743 One of the most universal needs of animals is to understand the environment in which they live to move in complex and diverse environments in search of congeners, to flee predators or capture prey. The acquisition of information can be done in various ways with the senses of hearing, touch,…
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