Meiothermus rufus sp. nov., a new slightly thermophilic red-pigmented species and emended description of the genus Meiothermus

Four red-pigmented isolates, with optimum growth temperatures of approximately 55–60 °C and an optimum pH for growth between 7.5 and 8.5, were recovered from hot springs in Central France. Phylogenetic analysis of the 16S rRNA gene sequences showed that these organisms represented a new species of the genus Meiothermus. The new isolates could be distinguished from other strains of the species of the genus Meiothermus primarily by the glycolipid profile and fatty acid composition because these organisms lacked the hydroxy fatty acids and the glycolipid variant GL-1a found in all other isolates of the species of Meiothermus examined. On the basis of the results presented here we propose the name Meiothermus rufus for the new species, which is represented by strains CAL-4^T (=DSM 22234^T=LMG 24878^T) and CAL-12 (=DSM 22235=LMG 24879). We also propose emending the genus Meiothermus to include strains that have only one glycolipid instead of two glycolipid variants.     

Description of Idiomarina insulisalsae sp. nov., isolated from the soil of a sea salt evaporation pond,proposal to transfer the species of the genus Pseudidiomarina to the genus Idiomarina and emended description of the genus Idiomarina

A halophilic, aerobic Gram-negative bacterium, designated strain CVS-6^T, was isolated from a sea salt evaporation pond on the Island of Sal in the Cape Verde Archipelago. Phylogenetic analysis of the 16S rRNA gene sequence revealed a clear affiliation of the organism with members of the family Idiomarinaceae. Sequence similarities between CVS-6^T and the type strains of the species of the genera Pseudidiomarina and Idiomarina ranged from 93.7% to 96.9%. The major isoprenoid quinone was ubiquinone 8 (Q-8). The major cellular fatty acids were 15:0 iso (21.8%), 17:0 iso (12.5%), 17:1 iso ω9c (10.7%), and 16:1 ω7c (10.6%). The DNA G+C content was 51.6 mol%. The species represented by strain CVS-6^T could be distinguished from the species of the genera Pseudidiomarina and Idiomarina; however, it was not possible to distinguish both genera from each other using the phenotypic or chemotaxonomic characteristics examined. Consequently, we propose that the species classified in the genus Pseudidiomarina should be transferred to the genus Idiomarina. We also propose that, on the basis of physiological and biochemical characteristics, strain CVS-6^T (=LMG 23123=CIP 108836) represents a new species which we name Idiomarina insulisalsae.     

陕南早寒武世早期Quadrapyrgites再研究

处于"寒武纪生命大爆发"序幕阶段的梅树村期,生物类群大规模辐射,身体构型快速革新,与前寒武纪生物群面貌明显不同.最近在陕南宁强宽川铺地区梅树村期地层中发现了大量五辐射Punctatus及部分四辐射四方塔形壳属Quadrapyrgites,其中包括1个新种Quadrnpyrgites undulatuscostalis sp.nov..在此基础上对Quadrapyrgites进行了属征补充.双胚层腔肠动物的出现标志着地球生命史的真后生动物演化开端,在生物起源演化历程上占据着关键的位置.本文为研究真后生动物起源演化、生物辐射、体型构建提供了重要实证.     

The scales of salticid spiders

The form and location of the scales of salticid spiders, as revealed by light and scanning electron microscopy, provide useful diagnostic characters for the separation of species, the assignment of species to genera, and a further understanding of the relationships between salticid genera. Partly on the basis of distinctions provided by scale structure, the new genus Platycryptus , type-species Aranea undata De Geer, 1778, is defined. Metaphidippus vitis Cockerell, 1894, is placed in the genus Sassacus Peckham, 1895, and Paromaevia michelsoni (Barnes), 1955, is returned to the genus Maevia . The placement of Eris, Hentzia, Icius, Metaphidippus, Phidippus , and Sassacus in the subfamily Dendryphantinae is substantiated; Tutelina and Zygoballus are added to this group. On the basis of common scale structure, Evarcha, Habrocestum, Menememerus, Phlegra, Platycryptus , and Sitticus are tentatively assigned to the subfamily Habrocestinae. Scales of Anasntis, Corythalia, Cosmophasis, Hyllus, Marpissa, Metacyrba, Pellenes, Plexippus, Salticus, Sarinda, and Thiodina are also described.     

Trichosporon siamense sp. nov. isolated from insect frass in Thailand

A strain of yeast isolated from insect frass collected in Thailand was found to represent a hitherto undescribed species of a basidiomycetous anamorphic genus Trichosporon. It is described as Trichosporon siamense. In the phylogenetic tree based on the D1/D2 region sequences of 26S rDNA, this yeast constitutes a cluster with several Q-9 having species of Trichosporon including T. otae and T. brassicae but is clearly differentiated from these species by 1.8% or more base substitutions. In the internal transcribed spacer region (ITS1 and ITS2), this species differs from T. scarabaeorum, the nearest species, by 6.5% base substitution.     

Ciborinia gentianae sp. nov., the causal organism of sclerotial flower blight of cut-flower gentians

A new Ciborinia causing sclerotial flower blight of cut-flower gentians (Gentiana triflora var. japonica and interspecific hybrids between related species or varieties) is described as Ciborinia gentianae on the morphological basis of sclerotia and apothecia. The characteristics of Ciborinia gentianae are (1) an abundant production of spermodochia in the hollow cavity of host stems; (2) flat and thin sclerotia produced beneath the epidermis and the inclusion of host vascular remnants within their medulla; (3) globose cells composed of ectal excipulum of apothecia; (4) elongated cells with a slight apical swelling in ectal excipulum at the apothecial margin; and (5) tetra nucleate ascospores. Asci and ascospores mounted in Melzer's reagent measured 156–208 × 8–12 μm and 11.8–15 × 5.5–7.1 μm, respectively.     

牛肝菌类一新种——蔚青华牛肝菌

蔚青华牛肝菌,其盖表有绒毛,柄等粗而细长,具棱纹无网纹,担孢子长短兼存,6–16μm兼之。本种庆祝著名真菌学家蔚青王云章教授,欣逢公百年华诞,其对西南菌学研究和人才培养,屡蒙厚贶,感不胜言,谨以此名,敬寄慕念。     

Himantura lobistoma, a new whipray (Rajiformes: Dasyatidae) from Borneo, with comments on the status of Dasyatis microphthalmus

A new long-snouted whipray, Himantura lobistoma, is described on the basis of seven specimens collected from the southeastern sector of the South China Sea, off western Borneo. It belongs to a subgroup of Himantura species provisionally defined herein as the “uarnacoides” complex that includes five nominal species: H. chaophraya, H. granulata, H. hortlei, H. pastinacoides, and H. uarnacoides. These whiprays all have a similar lateral disc shape (i.e., pectoral-fin apices broadly rounded rather than narrowly rounded or angular), a plain colouration (i.e., usually uniform light to dark brown dorsally, and pale or whitish ventrally with or without a dark margin), a long and slender whiplike tail, and platelike denticles in a broad dorsal band in adults. Himantura lobistoma can be distinguished from the superficially similar H. hortlei by its highly protrusible mouth and pelvic girdle with prominent lateral prepelvic processes. It differs from other members of the “uarnacoides” complex by a combination of internal and external morphological characteristics (e.g., having an extremely elongate snout and very small eyes). Another long-snouted stingray from the region, Dasyatis microphthalmus Chen, inadequately described and known only from the lost holotype, is considered a nomen dubium. It had been assigned to Himantura based on the absence of an obvious ventral cutaneous tailfold but may be conspecific with D. acutirostra.