查看更多>>摘要：Spiders of the family Hahniidae from the rainforest area of Xishuangbanna are examined. Totally 7 species, including 5 new species are reported: Alistra annulata sp. nov. (male), A. hippocampa sp. nov. (male, female), Hahnia saccata sp. nov. (male, female), H. submaginii sp. nov. (male, female) and H. senaria sp. nov. (male, female). Two known species, Hahnia flagellifera Zhu, Chen & Sha, 1989 (male, female) and H. himalayaensis Hu & Zhang, 1990 (male, female) are firstly recorded from Yunnan Province and redescribed here. The genus Alistra is firstly recorded from China. Morphological descriptions, illustrations and photos of all species are given. All specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences in Beijing (IZCAS).
查看更多>>摘要：A new species of Megophryidae, Leptobrachium bompu is described from Eaglenest Wildlife Sanctuary, Arunachal Pradesh, India. It is a medium sized member of the genus Leptobrachium. In life, the frog is distinguished by the combination of a series of morphological characters from its congeners. Its entirely greyish-blue coloured eyes differentiate the species from all other species in the genus but Leptobrachium waysepuntiense. The morphological comparison is based on a table of 16 characters discriminant in Leptobrachium species.
查看更多>>摘要：Mate choice significantly impacts upon population divergence and therefore speciation, recognition of equals being critical in cases where species and divergent populations coexist. The New World species of the brine shrimp Artemia, A. franciscana and A. persimilis, were compared through Scanning Electron Microscopy (SEM) for the following traits: shape and ornamentation of spine-like projections on the basal part of the penes; relative size, shape and ornamentation of the frontal knobs; cuticolar cones on the male second antenna, and ovisac (brood pouch) morphology. In particular, frontal knobs, described as playing a role in maintaining riding pairs attached (amplexus), and ovisac morphology, grouped all individuals into the corresponding species, but these differences seem too subtle to prevent inter-specific mating. In other words, mating between both species would be unspecific (not a key-lock type), an expected finding for allopatric species that would not have the chance to reinforce reproductive mechanisms in sympatry, as predicted by the allopatric mode. Additionally, both species inhabit selectively differential habitats that would prevent viability of migrants. At the population level, A. franciscana locations at the southern edge of the species distribution in the Americas (Chile) showed variation to the typical A. franciscana pattern, a somewhat expected finding for peripheral populations. The saltworks at Pichilemu (34 degrees S, central Chile) appear to be a special environment where individuals from both species could eventually coexist, as inferred by the hybrid-like appearance of some individuals. This type of environment facilitates the testing of novel morphological variants which may affect the shaping of morphological divergence.
Da Silva, Ana ArandaGooday, Andrew J.Pearse, Richard B.Cunha, Marina R. ....
10页
查看更多>>摘要：We describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan ('saccamminid') collected in multicore samples at 4400 m on the terrace of the lower Nazare Canyon on the Portuguese margin. The test is spherical to oval, up to similar to 400 mu m in length, with a simple circular aperture. The wall has a very smooth surface with a distinct sheen in reflected light. It is <10 mu m thick and composed of very fine agglutinated plate-like clay particles and a thin inner organic layer. The most distinctive feature of the new species is that the test is contained within an agglutinated case ('secondary test') composed mainly of larger (10-50 mu m) quartz grains. The case is equipped with a long, narrow tube that originates near the aperture of the inner test and presumably acts as a channel through which pseudopodia are deployed. Secondary agglutinated structures have been described in a number of foraminifera, but never before in a 'saccamminid'.
查看更多>>摘要：Trichomycterus tropeiro, new species, is described from the headwaters of the rio das Antas, laguna dos Patos system, Southern Brazil. Trichomycterus tropeiro is distinguishable from other species of the genus by the absence of pelvic fins and pelvicgirdle, except from Trichomycterus candidus and Trichomycterus catamarcensis. It differs from these two species in several counts and measurements. The apparent endemism of the species is discussed.
查看更多>>摘要：Tara Duncan, 1994, was established as a terrestrial genus of New Zealand talitrid amphipods, with the type species Orchestia sylvicola Dana, 1852. It was recently discovered to be a junior homonym of Tara Peckham & Peckham, 1886, a genus of salticid spiders (Araneae, Salticidae, Amycinae, Astiini). Tara Peckham & Peckham, 1886, is a valid name in current use for a small endemic genus of Australian jumping spiders recently revised by Zabka (1987). Tara Duncan, 1994, appears in the literature at leastthree times: in the original description of the genus (Duncan 1994), in identification keys to the terrestrial amphipods of New Zealand (Fenwick & Webber 2008), and in the recent inventory of New Zealand biodiversity (Webber et al. 2010). The new name, Dana, is proposed to replace Tara Duncan, 1994.
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