共查询到20条相似文献,搜索用时 15 毫秒
1.
The behavior of polar deep-sea nekton is very poorly known. To obtain insight into mating behavior of the abundant and ecologically important sub-Antarctic deep-sea squid Onykia ingens, our goals were to (1) quantify spermatophore production; (2) determine the preferred location for spermatangia deposition; (3) investigate whether male and female O. ingens mate with multiple mates; and (4) discuss the location of implanted spermatangia in light of mating behavior and egg fertilization. Toward this end, we examined male and female O. ingens specimens from Falkland Island and New Zealand waters. Male O. ingens store up to 198 spermatophores (mean 103 ± 61; n = 12) in their reproductive system, which are produced over a period of considerable somatic growth (200–400 mm ML), and which may have a considerable size range. Males insert their long extendible terminal organ in the mantle cavity of the female, potentially through the funnel, to deposit spermatophores in one or more of four regions on the female’s body. Most implanted spermatangia (52.5 %) were found in the funnel region, but many were also found inside the mantle cavity closer to the oviducts. Males with longer terminal organs therefore may be able to position closer to the oviducts where fertilization chances are higher than for spermatangia located in the funnel region. The number of implanted spermatangia per individual female (4–60, mean 29 ± 20; n = 24), the multiregional spermatangia deposition, and the different outer appearance of spermatangia, suggested that females have multiple mating events. Since males produce more spermatophores (up to 200) than the number of spermatangia in one region (<60), it is likely that males too mate with more than one female. We show how quantitative assessment of reproductive characteristics can provide insight into the reproductive behavior of deep-sea species for which in situ observations are currently lacking. 相似文献
2.
3.
Amanita concentrica sp. nov. is described from an evergreen broad-leaved forest of Chiba Prefecture with Castanopsis cuspidata var. sieboldii and Quercus glauca. The fungus is a medium to large, white to yellowish-white mushroom characterized by many pyramidal warts on pileus, striate
margin of pileus, distinct ascending concen-tric rings at upper part of stipe bulb, and inamyloid basidiospores. It is considered
to belong to the section Amanita.
Received: March 30, 2001 / Accepted: October 1, 2001 相似文献
4.
A powdery mildew fungus on leaves of Dalbergia cultrata var. cultrata (Fabaceae) collected at the Queen Sirikit Botanical Garden in northern Thailand is proven to be a new species of the genus Brasiliomyces and is described as B. chiangmaiensis sp. nov. with light and SEM micrographs. Differences in known Brasiliomyces species are discussed, and a key to species of this genus is provided. 相似文献
5.
Gymnopilus ombrophilus sp. nov., growing on rotten wood of conifers and hardwoods from Niigata, Japan is described and illustrated. It is characterized by its medium-sized, brownish-orange basidiocarps with a finely squamulose pileus, stipe lacking an annulus, and mild taste, and microscopically by dextrinoid, small, broadly ellipsoid basidiospores. The new species belongs to the section Microspori. The differences between the taxon and similar species are briefly discussed. 相似文献
6.
Cortinarius breviradicatus sp. nov., found in deciduous forests, is described and illustrated from Niigata, Japan. It is characterized by its medium-sized
to large dark brown basidiocarp, acutely conical pileus, and rooting stipe, and by subglobose to broadly ellipsoid basidiospores.
In addition, the extracting solution from its basidiocarps exhibits a strong fluorescence around 400–430 nm in ultraviolet
radiation (250 nm), which was observed in a species of Cortinarius sect. Orellani. The new species belongs to the section Orellani. The differences between the new taxon and similar species are briefly discussed. 相似文献
7.
Two fungi collected from submerged woody debris were found to represent hitherto undescribed species of the ascomycete genera
Clohiesia and Paraniesslia. They are described as Clohiesia curvispora sp. nov. and Paraniesslia aquatica sp. nov. based on morphological characters. Clohiesia curvispora is characterized by immersed ascomata under a clypeus, and unitunicate, cylindrical asci containing one-celled, curved, elongate-fusiform
ascospores. Paraniesslia aquatica is characterized by small, superficial, setose ascomata, and unitunicate, clavate asci containing verrucose, brown ascospores.
Each species is illustrated with light micrographs and compared with similar taxa in this article. 相似文献
8.
Seven species of the genus Lophiostoma were the subject of this study. Among these, Lophiostoma mucosum is described and illustrated as a new species. All other species, L. macrostomum, L. semiliberum, L. arundinis, L. caulium, L. caudatum, and L. winteri, are reported for the first time in Japan. A key to the species of Lophiostoma in Japan is given.
Received: August 5, 2002 / Accepted: November 28, 2002
Acknowledgments We are grateful to Dr. Hideki Takahashi (curator of SAPA) for the loan of fungal material.
Correspondence to:Y. Harada 相似文献
9.
A. R. Wood 《Mycological Progress》2007,6(2):93-99
The holdings of rust fungi on Grewia species (Tiliaceae) housed in the South African National Collection of Fungi (PREM) were examined. They belong to three morphologically
similar, but clearly separable, species of Uredopeltis, and a species of Uredo. Each rust species has a distinct and restricted host range. Ravenelia atrides is a species of Uredopeltis and is transferred accordingly. Several specimens previously accessioned under R. atrides however belong to U. chevalieri. The specimens previously accessioned under Uredo grewiae belong to U. flava, and not U. chevalieri. Three specimens are best placed in Uredo corbiculoides.
Taxonomic novelties
Uredopeltis atrides (Syd. & P. Syd.) A.R. Wood. comb. nov. 相似文献
10.
Five species of the genus Lophiotrema are reported in this article. Of these, Lophiotrema vitigenum is described and illustrated as a new species. Three species, L. nucula, L. neohysterioides, and L. vagabundum, are newly added to the Japanease mycoflora. Lophiosphaera orientalis, Nodulosphaeria araucariae, and N. rosae, which had been recorded in Japan, are treated as synonyms of Lophiotrema fuckelii. A key to the species of Lophiotrema in Japan is given.
Received: October 9, 2002 / Accepted: January 20, 2003
Acknowledgments We are grateful to Drs. Shuhei Tanaka (curator of YAM) and Ken Katumoto for the loan of fungal material.
Correspondence to:K. Tanaka 相似文献
11.
A new species of the genus <Emphasis Type="Italic">Stempellinella</Emphasis> (Diptera: Chironomidae) from Hiroshima,Japan 总被引:1,自引:0,他引:1
Stempellinella coronata sp. n. is described and illustrated based on male imagines. The new species can be separated from other Stempellinella species by its small size, low antennal ratio, high front leg ratio, minute frontal tubercles, a comparatively long median volsella, lacking median tergal setae, and lacking well-developed anal crests on the tergite IX. The generic diagnosis of Stempellinella is emended mainly to accommodate S. coronata. The species has so far been collected only from autumn to winter at pools in the unpolluted upper to mid reaches and was recorded first from the Ohta River system, Hiroshima, Japan. 相似文献
12.
Summary A taxonomic revision of the palm genus Podococcus (Arecaceae) is presented. Two species are recognised: P. barteri, a species relatively widespread in a coastal band from Nigeria to the D. R. Congo and P. acaulis, a species previously considered conspecific to P. barteri, almost exclusively confined to Gabon. The taxonomic history, morphology, distribution and conservation status of the genus
and each species are discussed 相似文献
13.
14.
Typhula maritima on coastal dunes in Ishikari and Yoichi, Hokkaido, northern Japan, is illustrated as a new species on the basis of morphology
and molecular evidence. The sclerotia in the sand had mycelial strands that extended upward to support basidiocarps. Mycelial
strands also connected sclerotia with plant tissues of the dunegrass Eylmus mollis Trin. Typhula maritima is psychrotrophic and halotrophic, and sclerotia floated on seawater for 1 week. These physiological characteristics are
important factors for adaptation to the coastal dune environment. Inoculation tests indicated that T. maritima could grow on living E. mollis, but it was not pathogenic. The results suggested that this fungus was, at least, not an active pathogen in the coastal dune
ecosystem. Ex-holotype is TH-AIST-Tm-1 (= NBRC 104266). 相似文献
15.
Sarawood Sungkaew Atchara Teerawatananon John A. N. Parnell Chris M. A. Stapleton Trevor R. Hodkinson 《Kew Bulletin》2008,63(4):669-673
Summary A new monotypic bamboo genus Phuphanochloa (Poaceae: Bambusoideae) from north-eastern Thailand is described, together with a new species, P. speciosa. 相似文献
16.
Haruki Takahashi 《Mycoscience》2007,48(6):342-357
Eight new species of the genus Mycena (Agaricales) found on dead leaves or twigs in warm temperate lowland forests are described and illustrated from central Honshu,
Japan: (1) Mycena fonticola sp. nov. (section Fragilipedes); (2) Mycena intersecta sp. nov. (section Fragilipedes); (3) Mycena lanuginosa sp. nov. (section Fragilipedes); (4) Mycena mustea sp. nov. (section Fragilipedes); (5) Mycena multiplicata sp. nov. (section Mycena); (6) Mycena nidificata sp. nov. (section Hiemales); (7) Mycena fuscoaurantiaca sp. nov. (section Fragilipedes); and (8) Mycena clariviolacea sp. nov. (section Fragilipedes). 相似文献
17.
18.
19.
20.
A rust species on Calystegia soldanella in Japan has been treated as Puccinia convolvuli to date. However, morphological characteristics of specimens on C. soldanella collected from Japan are significantly different from those of specimens on other Calystegia and Convolvulus species from different areas of the world. It is proved by inoculation experiment that the rust on C. soldanella is specific to C. soldanella. Based on these results, Puccinia rust on C. soldanella from Japan is described as a new species, Puccinia calystegiae-soldanellae. 相似文献