Nuevos datos sobre los coniopterígidos de África y Europa (Insecta, Neuroptera, Coniopterygidae)

New data on the biology, distribution and sometimes morphology of 43 Palaearctic and Afro-tropical dusty wings species are given. A great variability margin in the presenceabsence and extension of scale like hairs in male antennae of some species of subgenus Xeroconiopteryx has been detected and such character (very frequently used) is proposed to be rejected as a definitive taxonomical character to differentiate problematic species of this subgenus with very similar male genitalia. On the contrary, vertex sedation and structures (figured for some different species) seem to be a very good character to be taking into account. Coniocompsa silvestriana Enderlein, 1914 = (Coniocompsa smithersi Meinander, 1972) n. syn. and Parasemidalis alluaudina (Navás, 1912) = (Semidalis alluaudina Navás, 1912 = Parasemidalis fusca Meinander, 1963) n. syn. are proposed as new synonymies. Helicoconis canariensis n. sp. and Coniopteryx canariensis n. sp. from Canary Islands and Semidalis pallidicornis n. sp. from Uganda are described as new species.Se aportan nuevos datos sobre la biología, distribución y morfología de 43 especies de coniopterígidos Paláearticos y Afrotropicales. Se pone de manifiesto la existencia de una marcada variabilidad en la presencia-ausencia y extensión de setas escuamiformes en las antenas de los machos de varias especies del subgénero Xeroconiopteryx, por lo que se propone desechar este carácter taxonómico (muy frecuentemente usado) para diferenciar las especies conflictivas con similar genitalia masculina dentro de este subgénero. Por el contrario, la quetotaxia y las estructuras del vértex (anotado para diferentes especies) sí representa un buen carácter taxonómico a tener en cuenta. Coniocompsa silvestriana Enderlein, 1914 = (Coniocompsa smithersi Meinander, 1972) n. syn. y Parasemidalis alluaudina (Navás, 1912) = (Semidalis alluaudina Navás, 1912 = Parasemidalis fusca Meinander, 1963) n. syn. se proponen como nuevas sinonimias. Se describen como nuevas especies a Helicoconis canariensis n. sp. y Coniopteryx canariensis n. sp. de las Islas Canarias y a Semidalis pallidicornis n. sp. de Uganda

Nuevos datos sobre la taxonomía y la faunística de los coniopterígidos de Senegal (Insecta, Neuroptera, Coniopterygidae)

New data on the taxonomy, biology, distribution and/or morphology of eight dusty wing species from Senegal are given. None had previously been recorded from this country. In this African area (where the Afrotropical and Palaearctic Biogeographical Regions contact) a great number of species can be found, mostly afrotropical elements, but also some palaearctic elements and species with a wide circumsaharan distribution are present. A great faunistic similarity between the Senegalese Fauna and the SW Arabian Peninsula fauna is noted, and both areas show many common elements present in the East-West Afrotropical northern borders. Some new synonymies are proposed as follow: Aleuropteryx felix Meinander, 1977 = (Aleuropteryx teleki Sziráki, 1990 = Aleuropteryx transvaalensis Meinander, 1998), Aleuropteryx Arabica Meinander, 1977 = (Aleuropteryx cruciata Sziráki, 1990), Coniocompsa silvestriana Enderlein, 1914 = (Coniocompsa arabica Sziráki, 1992 = Coniocompsa fimbrata Tjeder, 1957), Coniopteryx (Coniopteryx) greenpeace Monserrat, 1995 = (Coniopteryx (Coniopteryx) sclerotica Meinander, 1998), Coniopteryx (Xeroconiopteryx) triantennata Monserrat, 1995 = (Coniopteryx (Xeroconiopteryx) sestertia Meinander, 1998) and Nimboa marroquina Monserrat, 1985 = (Nimboa manselli Meinander, 1998). Also a replacement name: Coniopteryx (Xeroconiopteryx) conviventibus nom. nov. is proposed for Coniopteryx (Xeroconiopteryx) furcata Meinander, 1998 nec Coniopteryx (Scotoconiopteryx) furcata Meinander, 1983.Se anotan nuevos datos sobre la taxonomía, biología, distribución y /o morfología de ocho especies de coniopterígidos recolectados en Senegal. Ninguna de ellas había sido citada en este país. Al igual que ocurre en el SO de la Península Arábiga, esta zona del Continente Africano (donde confluyen las Regiones Biogeográficas Afrotropical y Paleártica) es especialmente rica en especies, la mayoría son afrotropicales, pero también están presentes algunos elementos paleárticos y otros de amplia distribución circumsahariana. Se anota una marcada similitud faunística entre ambas zonas con elementos comunes que alcanzan las zonas septentrionales que al este y el oeste limitan la Región Afrotropical. Se proponen como nuevas sinonimias a: Aleuropteryx felix Meinander, 1977 = (Aleuropteryx teleki Sziráki, 1990 = Aleuropteryx transvaalensis Meinander, 1998), Aleuropteryx arabica Meinander, 1977 = (Aleuropteryx cruciata Sziráki, 1990), Coniocompsa silvestriana Enderlein, 1914 = (Coniocompsa arabica Sziráki, 1992 = Coniocompsa fimbrata Tjeder, 1957), Coniopteryx (Coniopteryx) greenpeace Monserrat, 1995 = (Coniopteryx (Coniopteryx) sclerotica Meinander, 1998), Coniopteryx (Xeroconiopteryx) triantennata Monserrat, 1995 = (Coniopteryx (Xeroconiopteryx) sestertia Meinander, 1998) y Nimboa marroquina Monserrat, 1985 = (Nimboa manselli Meinander, 1998) y se propone un nombre de reemplazo a: Coniopteryx (Xeroconiopteryx) conviventibus nom. nov. para Coniopteryx (Xeroconiopteryx) furcata Meinander, 1998 nec Coniopteryx (Scotoconiopteryx) furcata Meinander, 1983

Dissociation of high-pressure solid molecular hydrogen: Quantum Monte Carlo and anharmonic vibrational study

A theoretical study is reported of the molecular-to-atomic transition in solid hydrogen at high pressure. We use the diffusion quantum Monte Carlo method to calculate the static lattice energies of the competing phases and a density-functional-theory-based vibrational self-consistent field method to calculate anharmonic vibrational properties. We find a small but significant contribution to the vibrational energy from anharmonicity. A transition from the molecular Cmca-12 direct to the atomic I4_1/amd phase is found at 374 GPa. The vibrational contribution lowers the transition pressure by 91 GPa. The dissociation pressure is not very sensitive to the isotopic composition. Our results suggest that quantum melting occurs at finite temperature.Comment: Accepted for publication by Phys. Rev. Let