Neocallimastix hurleyensis sp.nov., an anaerobic fungus from the ovine rumen

1991 ◽  
Vol 69 (6) ◽  
pp. 1220-1224 ◽  
Author(s):  
Jill Webb ◽  
Michael K. Theodorou
Keyword(s):  
Life Cycle ◽  
Key Words ◽  
Type Species ◽  
Endogenous Development ◽  
Anaerobic Fungi ◽  
Anaerobic Fungus ◽  
Posterior Portion ◽  
Zoospore Release ◽  
Close Proximity ◽  
Intracellular Organelles

A new member of the Neocallimasticaceae (Spizellomycetales), Neocallimastix hurleyensis sp.nov., is described. This species was isolated from the ovine rumen and has been referred to previously as Neocallimastix sp., strain R1. It has a classical monocentric type of life cycle, with polyflagellated zoospores, endogenous development of the zoosporangium, and death of the thallus following zoospore release. Although N. hurleyensis is similar to two other members of the genus, N. frontalis (the type species) and N. patriciarum, the zoospores possess 8–16 flagella, have no equatorial constriction, and exhibit segregation in the localization of intracellular organelles. A large organelle (presumptive hydrogenosome) is situated in the posterior portion of the cell, in close proximity to the kinetosomal apparatus. It is the size, location, and complexity of this organelle that explicitly distinguishes N. hurleyensis from other members of the genus. Key words: systematics. Neocallimasticaceae, Neocallimastix, Neocallimastix hurleyensis, anaerobic fungi, rumen fungi.

Production of uredinia and telia by stalactiform blister rust in British Columbia

1993 ◽  
Vol 71 (3) ◽  
pp. 519-521 ◽  
Author(s):  
B. J. van der Kamp
Keyword(s):  
British Columbia ◽  
Life Cycle ◽  
Key Words ◽  
Alternate Host ◽  
Alternate Hosts ◽  
Blister Rust ◽  
Dry Areas ◽  
Do So

Records of uredinia and telia production on the alternate hosts of Cronartium coleosporioides in British Columbia and inoculation of Castilleja miniata with aeciospores collected from various locations showed that rust isolates from dry areas of the interior of British Columbia do not produce uredinia and may have lost the ability to do so. Collections from somewhat wetter areas produced uredinia or mixtures of uredinia and telia immediately following aeciospore inoculations, and field collections from such areas in June commonly had mixtures of uredinia and telia. Loss of the uredinial stage may be a response to climates that are often unsuitable for the spread or survival of the rust on the alternate host. Key words: stalactiform rust, uredinia, telia, rust life cycle.

MORPHOLOGICAL VARIABILITY AND LIFE CYCLE TRAITS OF THE TYPE SPECIES OF THE DIATOM GENUSCHAETOCEROS,C. DICHAETA

2008 ◽  
Vol 44 (1) ◽  
pp. 152-163 ◽  
Author(s):  
Philipp Assmy ◽  
David U. Hernández-Becerril ◽  
Marina Montresor
Keyword(s):  
Life Cycle ◽  
Type Species ◽  
Morphological Variability

scholarly journals METODE INTERAKSI PARENTING: UPAYA MENGOPTIMALKAN PENDIDIKAN SISWA SEJAK DINI

2016 ◽  
Vol 3 (02) ◽  
Author(s):  
Moh Rifai
Keyword(s):  
Life Cycle ◽  
Elementary Students ◽  
Key Words ◽  
Well Being ◽  
Good Schools ◽  
Children Education ◽  
First Time ◽  
Do So ◽  
The Way

<p>Parents are obliged to take care of their children’s future, especially by rendering sufficient education. Children are believed to bring about happiness every now and then, who generate family’s pride up to the almighty judication. Some people are save and some are not in that court, where children will give sigificant contribution in it. That’s why the children’s well being has become the parents obligation. To bring about children’s well being, parents should also render the good treatments during the life cycle of their children. The main duties of parents for their children are giving them the good names, sending them to the good schools where they can learn religion, and marry them to their good spouses. Psychologically, when children are sent to school for the first time, they will feel that they are put apart from parents’ care, so that may of them have to go difficult phase of adjustment. The adjustment includes that of education so as to run as naturally as possible. To get the naturality of the education delegation, teachers and educators are obliged to be able to nurture any value to students as naturally as possible. Parenting model of teaching serves the requirements of teaching children just the way the parrents do, so that it is assumptively effective in teaching elementary students by taking consideration on the psychologial aspect of children.</p><p> </p><p>Key words:   Parenting Model of teaching, children education optimalization</p>

A new approach to the phylogeny of Euascomycetes with a cladistic outline of Arthoniales focussing on Roccellaceae

1990 ◽  
Vol 68 (11) ◽  
pp. 2458-2492 ◽  
Author(s):  
Anders Tehler
Keyword(s):  
Key Words ◽  
Type Species ◽  
Parallel Evolution ◽  
Special Focus ◽  
New Approach ◽  
Lichenicolous Fungi ◽  
Working Hypothesis ◽  
The Family ◽  
Traditional Sense ◽  
Bitunicate Ascus

A phylogenetic working hypothesis of euascomycete relationships is presented. Paraphysoidal ascolocular fungi are monophyletic and ascohymenial fungi are paraphyletic as paraphyses are considered plesiomorphic and paraphysoids apomorphic within euascomycete fungi. As a result it is not necessary to postulate parallel evolution of the bitunicate ascus, and furthermore presence of paraphyses in the prototunicate caliciaceous fungi is no longer in conflict with paraphyses in ascohymenial fungi. A cladistic outline of the order Arthoniales with special focus on the Roccellaceae including 20 taxa and 92 characters is presented. The type species of all genera considered are used as terminal taxa. It is suggested that the type species of Arthothelium should be excluded from the order Arthoniales. The Arthoniaceae are paraphyletic as Arthonia radiata and Arthothelium spectabile form a grade pair. The family Roccellaceae is monophyletic and corroborated in its traditional sense, but some rearrangements within the family are made. Opegrapha vulgata and Lecanactis abietina form a pair, but the family Opegraphaceae is paraphyletic if the pair Chiodecton sphaerale and Schismatomma pericleum are included. The originally described ascoma of the species Darbishirella gracillima, Ingaderia pulcherrima, and Reinkella fragillima are found to be lichenicolous fungi. The mycobiont ascomata of Darbishirella gracillima produce 3- not 2-septate spores. No ascomata of the mycobionts of the two latter species have as yet been found. Key words: Euascomycetes, Arthoniales, Roccellaceae, phylogeny, cladistics, lichenicolous.

scholarly journals Developmental stages of a mottled emigrant butterfly, catopsilia pyranthe

1970 ◽  
Vol 19 (2) ◽  
pp. 171-179 ◽  
Author(s):  
MH Arju ◽  
MA Bashar ◽  
G Moula
Keyword(s):  
Life Cycle ◽  
Survival Rate ◽  
Key Words ◽  
Laboratory Condition ◽  
Food Consumption ◽  
Larval Stage ◽  
Developmental Stages ◽  
Average Duration ◽  
Cycle Duration ◽  
Life Cycle Duration

The overall life cycle, duration and survival rate of different developmental stages (egg, larva and pupa) of Catopsilia pyranthe conducted at 27 ± 3°C and RH 75% ± 2. showed that within 6.4 days 68% eggs hatched. The average duration from egg to adult, larval stage and pupal were 23.87, 10.93 and 6.8 days, respectively. Fifty six out of 68 larvae successfully completed their whole 5 instars. There were positive correlation among the larval instars, amount of food consumption and excretion of faeces. About 52% pupa were emerged as adult at laboratory condition. Key words: Life cycle; Catopsilia pyranthe; Developmental stages; Rearing DOI: http://dx.doi.org/10.3329/dujbs.v19i2.8961 DUJBS 2010; 19(2): 171-179

The 3rd-instar larvae of 8 Fennoscandian species of Hydroporus Clairville (Coleoptera: Dytiscidae), with notes on subgeneric classification

1986 ◽  
Vol 17 (4) ◽  
pp. 491-502 ◽  
Author(s):  
Anders N. Nilsson
Keyword(s):  
Life Cycle ◽  
Type Species ◽  
Junior Synonym ◽  
Larval Morphology ◽  
Habitat Distribution ◽  
In Captivity

AbstractThe 3rd-instar larvae of 8 Fennoscandian species of Hydroporus, including the type species of the 2 subgenera Sternoporus Falkenström and Hydroporidius Guignot, are described based on material from N. Sweden. Larvae were reared from eggs laid in captivity, or collected in the field and identified after pupation. A key for the identification of Hydroporus larvae is provided, including 20 of the 34 species known from Fennoscandia. Data on phenology and habitat distribution of the species described are given. Three different life-cycle types are recognized in the genus. The subgeneric classification is discussed in the light of larval morphology. The subgenus Hydroporidius Guignot, 1949 is made a junior synonym of Sternoporus Falkenström, 1930. The species of the memnonius-group are transferred from Hydroporus (s. str.) to Sternoporus. The isolated position of H. picicornis is noted.

Eimeria mitis: a comparison of the endogenous developmental stages of a line selected for early maturation and the parent strain

Parasitology ◽  
1984 ◽  
Vol 88 (1) ◽  
pp. 37-44 ◽  
Author(s):  
V. McDonald ◽  
M. W. Shirley
Keyword(s):  
Life Cycle ◽  
Epithelial Cells ◽  
Parent Strain ◽  
First Generation ◽  
Developmental Stages ◽  
Reproductive Potential ◽  
Life Cycles ◽  
Endogenous Development ◽  
Early Maturation ◽  
Precocious Line

SUMMARYThe endogenous development of the Houghton (H) strain of Eimeria mitis (= mivati) was compared with the life-cycle of a precocious (HP) line derived from the H strain. In both parasites 4 generations of schizonts which developed in epithelial cells were observed: the 1st and 2nd were found in the crypts and the 3rd and 4th in the villi. Gametocytes and zygotes occupied epithelial cells at the tips of the villi. The onset of gametogony normally coincided with the maturation of 4th-generation schizonts. The infection was confined initially to an area of the gut extending from the jejunum to the ileo-caecal junction but 3rd-generation merozoites and subsequent stages were also found in the caeca and rectum. The life-cycle of the precocious line was shorter than that of the parent strain. Gametocytes appeared to develop from 3rd-generation as well as from 4th-generation merozoites. Also, sporozoites of the precocious line transformed to trophozoites before those of the parent strain. First-generation schizonts of the HP line tended to be smaller and to contain fewer merozoites than those of the H strain. The differences between the life-cycles of the two parasites account for the lower reproductive potential of the precocious line.

Taxonomic implications of gamete fusions in the parasitic brown alga Herpodiscus durvillaeae

1990 ◽  
Vol 68 (6) ◽  
pp. 1398-1401 ◽  
Author(s):  
Akira F. Peters
Keyword(s):  
Life History ◽  
Life Cycle ◽  
New Zealand ◽  
Key Words ◽  
Brown Alga ◽  
Durvillaea Antarctica ◽  
Taxonomic Implications

Field material of Herpodiscus durvillaeae, a New Zealand endemic parasitic brown alga growing in the thalli of Durvillaea antarctica, was studied in the laboratory. Pale zoids released from diminutive gametophytes, which were attached to the walls of unilocular sporangia and vegetative filaments of Herpodiscus, acted as isogametes. A heteromorphic life cycle with alternation of an endophytic parasitic sporophyte and a diminutive gametophyte is thus proposed for H. durvillaeae, and taxonomic implications of this life history are discussed. Key words: Herpodiscus durvillaeae, sexuality, life history, Phaeophyceae, Durvillaea antarctica, parasite.

scholarly journals Anaerobic fungi (phylumNeocallimastigomycota): advances in understanding their taxonomy, life cycle, ecology, role and biotechnological potential

2014 ◽  
Vol 90 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Robert J. Gruninger ◽  
Anil K. Puniya ◽  
Tony M. Callaghan ◽  
Joan E. Edwards ◽  
Noha Youssef ◽  
...  
Keyword(s):  
Life Cycle ◽  
Anaerobic Fungi ◽  
Biotechnological Potential

A revision of the genera Antromycopsis, Sclerostilbum, and Tilachlidiopsis (Hyphomycetes)

1991 ◽  
Vol 69 (1) ◽  
pp. 6-15 ◽  
Author(s):  
Joost A. Stalpers ◽  
Keith A. Seifert ◽  
Robert A. Samson
Keyword(s):  
Key Words ◽  
Type Species ◽  
Nematophagous Fungi ◽  
Pleurotus Cystidiosus

The anamorphic genera Antromycopsis, Sclerostilbum, and Tilachlidiopsis are revised. Three anamorph species with basidiomycetous affinities are accepted in Antromycopsis: A. macrocarpa (Ellis & Everh.) comb.nov. (basionym Stilbum macrocarpum), previously known as A. broussonetiae (teleomorph: Pleurotus cystidiosus), A. angustata sp.nov. for the presumed anamorph of Pleurotus angustatus, and A. guzmanii sp.nov. (teleomorph Pleurotus smithii). A description and illustration are presented of the type species of Tilachlidiopsis, T. racemosa, the anamorph of Collybia racemosa. Sclerostilbum is considered a taxonomic synonym of Tilachlidiopsis. Nothoclavulina ditopa, the anamorph of Arthrosporella ditopa, is illustrated and briefly discussed. Key words: anamorph–teleomorph connections, Antromycopsis, Sclerostilbum, Pleurotus, Collybia, nematophagous fungi.

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