Beautiful wing coloration pattern in a new doratomantispine species (Neuroptera: Mantispidae) from the mid-Cretaceous Burmese amber.

A new species, namely Doratomantispa pouilloni sp. nov., of the mantidfly subfamily Doratomantispinae, is described and illustrated from a complete individual preserved in mid-Cretaceous amber from Tanai, northern Myanmar. Doratomantispa pouilloni sp. nov. preserves nearly all the diagnostic characters of this subfamily, but differs from the two other species of the genus Doratomantispa, inter alia, in its forelegs with stout trochanter, femora with nine spines on outer edge, two spines on inner edge, tibia with parallel sides, probasitarsomeres with around six pairs of black and thick spines; wings elongate and narrow, forewings with costal veinlets simple before ScP and RA fusion, coloration pattern present. Doratomantispa pouilloni sp. nov. highlights the diversity and the niche specialization of mid-Cretaceous Mantispidae from Tanai amber.

A twig-like insect stuck in the Permian mud indicates early origin of an ecological strategy in Hexapoda evolution.

Full body impressions and resting traces of Hexapoda can be of extreme importance because they bring crucial information on behavior and locomotion of the trace makers, and help to better define trophic relationships with other organisms (predators or preys). However, these ichnofossils are much rarer than trackways, especially for winged insects. Here we describe a new full-body impression of a winged insect from the Middle Permian of Gonfaron (Var, France) whose preservation is exceptional. The elongate body with short prothorax and legs and long wings overlapping the body might suggests a plant mimicry as for some extant stick insects. These innovations are probably in relation with an increasing predation pressure by terrestrial vertebrates, whose trackways are abundant in the same layers. This discovery would possibly support the recent age estimates for the appearance of phasmatodean-like stick insects, nearly 30 million years older than the previous putative records. The new exquisite specimen is fossilized on a slab with weak ripple-marks, suggesting the action of microbial mats favoring the preservation of its delicate structures. Further prospections in sites with this type of preservation could enrich our understanding of early evolutionary history of insects.

New Palaeogene horntail wasps (Hymenoptera, Siricidae) and a discussion of their fossil record.

The phylogenetic placement of siricid hymenopterans and especially the relationships among Siricidae are not resolved, and are in need of further investigation. The fossil record helps to illuminate the evolutionary history of this group. In this paper, Xoanon? eocenicus sp. nov. is newly described from the Eocene Fossillagerstätte Grube Messel (Germany). Although several characters of the wing venation of this fossil are similar to the extant genus Xoanon, there remain some doubts concerning the generic placement. A newly found fossil is attributed to Urocerus ligniticus (Piton, 1940) from the Paloecene Fossillagerstätte Menat (France) and provides more morphological information on this species. An overview of the fossil record of Siricidae in the strict sense is given and the state of knowledge on the different fossils is reviewed.

Exceptionally preserved insect fossils in the Late Jurassic lagoon of Orbagnoux (Rhône Valley, France).

The Late Kimmeridgian marine limestones of the area around Orbagnoux (Rhône, France) are well known for their fish fauna and terrestrial flora. Here we record the first insects and their activities (mines on leaves and trails in sediments) from these layers, including the oldest record of the gerromorphan bugs, as a new genus and species Gallomesovelia grioti, attributed to the most basal family Mesoveliidae and subfamily Madeoveliinae. These new fossils suggest the presence of a complex terrestrial palaeoecosystem on emerged lands near the lagoon where the limestones were deposited. The exquisite state of preservation of these fossils also suggests that these outcrops can potentially become an important Konservat-Lagerstätte for the Late Jurassic of Western Europe.

Introducción al estructuralismo

En las ciencias humanas y sociales de hoy, la noción de estructura y los métodos estructurales ocupan un sector cada vez más considerable de la investigación. Si en ciertos campos sus logros son resonantes en otros su introducción es más lenta y riesgosa, pero algo es seguro: ninguna disciplina ha podido sustraerse al efecto de demostración a que lugar una expresión que abarca por igual el análisis de la vida cotidiana y la exégesis bíblica, los lenguajes del hombre y las condiciones formales de su producción