Observations on the nematode Mermis nigrescens and related species

Parasitology ◽  
1944 ◽  
Vol 36 (1-2) ◽  
pp. 122-132 ◽  
Author(s):  
H. A. Baylis
Keyword(s):  
Life History ◽  
New Species ◽  
Experimental Infection ◽  
Related Species ◽  
Egg Laying ◽  
Feeding Experiments ◽  
Two New Species ◽  
History Of ◽  
Important Host ◽  
The Common

The main features of the life-history of Mermis nigrescens, so far as it is known, are briefly discussed. Some data have been collected on its distribution in the British Isles, and on the seasonal appearance of the egg-laying females. The insect hosts of the worm are discussed, and feeding experiments on various invertebrates are recorded, including the experimental infection of the common earwig (Forflctila auricularia). This insect, which has also been found naturally infested, is regarded as an important host for the species, more especially where grasshoppers are absent. Observations by other workers on the influence of the number of larvae per host on the sex of the developing worms, and on the survival of the host, have been confirmed. Two new species, closely related to M. nigrescens, are described: M. kenyensis and M. tahitiensis, from Africa and Tahiti respectively.

A Contribution to the Life History of Echinostomum secundum, Nicoll

Parasitology ◽  
1908 ◽  
Vol 1 (4) ◽  
pp. 352-358 ◽  
Author(s):  
Marie V. Lebour
Keyword(s):  
Life History ◽  
Littorina Littorea ◽  
Bivalve Mollusks ◽  
Larval Form ◽  
Larval Trematode ◽  
Feeding Experiments ◽  
History Of ◽  
The Common ◽  
Young Worm ◽  
Marine Laboratory

In some notes on the Trematodes of Northumbria published in 1905 a few remarks were made on a larval Trematode inhabiting the liver of the common periwinkle Littorina littorea. The liver in two per cent. of the periwinkles from Budle Bay was full of rediæ containing cercariæ more or less developed, the latter agreeing in every way with an encysted Echinostomum larva which inhabits mussels, cockles and other bivalve mollusks in the same locality. So close was the resemblance that I had no hesitation in declaring them to be the same worm in different stages, but hoped for an opportunity of demonstrating this by experiment. In October 1908 through the courtesy of Professor Meek I had the opportunity of conducting some feeding experiments in the Dove Marine Laboratory, Cullercoats, which have given satisfactory results, and although it is not possible to state absolutely that the forms are identical yet the evidence is so strong that I think I am justified in regarding the young worm in the periwinkle as an earlier larval form of the encysted worm in the foot of the mussel and cockle.

Studies on the Life History of Brachylaimus oesophagei Shaldybin, 1953 (Digenea: Brachylaimidae)

1969 ◽  
Vol 43 (1-2) ◽  
pp. 79-98 ◽  
Author(s):  
J. W. Lewis
Keyword(s):  
Life History ◽  
Digestive Gland ◽  
Related Species ◽  
Life Histories ◽  
Common Shrew ◽  
Sorex Araneus ◽  
Morphological Features ◽  
Closely Related Species ◽  
History Of ◽  
The Common

1. Brachylaimus oesophagei Shaldybin, 1953 from the common shrew, Sorex araneus castaneus Jenyns is described and compared with that of Shaldybin (1953) and a closely related species B. fulvus Dujardin, 1843.2. Despite unsuccessful attempts in hatching the egg of B. oesophagei, some morphological features of the miracidium are described and compared with previous studies on brachylaimid miracidia. Neither flame cells nor epidermal plates have been observed in miracidia of this family and present observations confirm this.3. A description is given of the cercaria and metacercaria of B. oesophagei from the kidney of the hollowed snail Zonitoides excavatus (Bean) at Aberystwyth, but no sporocysts or cercariae were found in the digestive gland.4. Previous work on brachylaimid life histories is discussed, together with a resumé of the life history of B. oesophagei.

New Terrestrial Amphipods (Amphipoda:Talitridae) From Australian Forests.

1982 ◽  
Vol 30 (3) ◽  
pp. 461 ◽  
Author(s):  
JA Friend
Keyword(s):  
Life History ◽  
New Species ◽  
Western Australia ◽  
New South ◽  
New South Wales ◽  
New Genera ◽  
South West ◽  
South Wales ◽  
Two New Species ◽  
History Of

Descriptions of two new genera including five new species of Australian landhoppers are presented. Two new species are recorded from south-west Western Australia (Austrotroides pectinalis and A. occidentalis) and one each from the Adelaide area (A. crenatus), southern Victoria (Agilestia hyperocha) and southern Queensland-northern New South Wales (A. hylaea). Notes on the life history of Austrotoides crenatus are provided.

The Development and Morphology of the Miracidium of Paramphistomum hiberniae Willmott, 1950

1952 ◽  
Vol 26 (2-3) ◽  
pp. 123-132 ◽  
Author(s):  
S. Willmott
Keyword(s):  
Life History ◽  
New Species ◽  
Experimental Infection ◽  
Life Histories ◽  
Developmental Stages ◽  
Detailed Account ◽  
Not Given ◽  
History Of ◽  
Paramphistomum Cervi ◽  
A New Species

Since the description by Looss in 1892 of the life-history of Diplodiscus subclavatus, and in 1896 of the miracidia of Gastrothylax gregarius, G. aegyptiacus and Paramphistomum cervi, there have been very few accounts of paramphistome life-histories. Gary (1909) published an account of the life-history of Diplodiscus temperatus, which Cort considered to be incorrect, and Krull and Price (1982) repeated the work on the same species. Beaver (1929) published an account of all the developmental stages of Allassostoma parvum except the sporocyst; Brumpt (1986) described the cercaria and the experimental infection of the intermediate and final hosts of P. cervi in Corsica. Willey (1941) has described the life-history and bionomics of Zygocotyle lunata, but has not given a very detailed account of the development of the egg and miracidium. The fullest account of a paramphistome has been given by Bennett (1986) of a species which was identified as Cotyhphoron cotylophorum, but which Price and Mackintosh (1944) consider to be a new species of the genus Paramphistomum, namely P. microbothrioides. Since the submission of this paper as part of a thesis for the Ph.D. degree, two further papers on the development of paramphistomes have come to the notice of the author. These are by Sinha (1950) on the development of C. cotylophorum in India, and by Willey and Godman (1951) on that of Z. lunata in America.

New orchid species (Orchidaceae) in the flora of Laos

2019 ◽  
pp. 25-40
Author(s):  
L. V. Averyanov ◽  
Khang Sinh Nguyen ◽  
T. V. Maisak ◽  
Hiep Tien Nguyen ◽  
N. L. Orlov ◽  
...  
Keyword(s):  
New Species ◽  
Related Species ◽  
Field Studies ◽  
Regional Literature ◽  
Orchid Species ◽  
Two New Species

This paper continues the publication of new data obtained during field studies in remote and poorly studied regions of Laos in 2015–2018. It provides descriptions of two new species (Bulbophyllum brachyscapum Aver. and Sunipia saccata Aver.), emended descriptions of two previously published but insufficiently known species (Cleisostoma verrucosum Aver., Oberonia vesiculifera Aver.) and reports of eight species newly recorded in the flora of Laos (Biermannia calcarata Aver., Bulbophyllum farreri (W. W. Sm.) Seidenf., Didymoplexiella trichechus (J. J. Sm.) Garay, Eria eriopsidobulbon C. S. P. Parish et Rchb. fil., Habenaria ciliolaris Kraenzl., Liparis caudata Aver. et K. S. Nguyen, Odontochilus umbrosus (Aver.) Ormerod, and Porpax ustulata (C. S. P. Parish et Rchb. fil.) Rolfe). Appropriate citations of regional literature, colour illustrations, data on types and distribution, descriptions, etymology, as well as notes on taxonomy and related species are provided for the studied species.

Two new species of Amphinemura (Plecoptera: Nemouridae) from China

Zootaxa ◽  
2011 ◽  
Vol 2975 (1) ◽  
pp. 29 ◽  
Author(s):  
WEIHAI LI ◽  
DING YANG
Keyword(s):  
New Species ◽  
Related Species ◽  
Taxonomic Relationships ◽  
Two New Species

Two new species of the genus Amphinemura from Ningxia and Zhejiang, China are described: A. ningxiana sp. n. and A. tianmushana sp. n. Their taxonomic relationships with related species are discussed.

Revision of the Australian species of Agrotera Schrank (Lepidoptera: Pyraloidea: Crambidae: Spilomelinae)

Zootaxa ◽  
2017 ◽  
Vol 4362 (2) ◽  
pp. 213 ◽  
Author(s):  
KAI CHEN ◽  
MARIANNE HORAK ◽  
XICUI DU ◽  
DANDAN ZHANG
Keyword(s):  
New Species ◽  
Related Species ◽  
Male Genitalia ◽  
New South ◽  
New South Wales ◽  
Taxonomic Status ◽  
Northern Territory ◽  
Australian Species ◽  
South Wales ◽  
Two New Species

The genus Agrotera Schrank, 1802 is revised for Australia and the generic definition is refined based on the male genitalia. The genera Leucinodella Strand, 1918 stat. rev. with L. leucostola (Hampson, 1896) comb. nov., Nistra Walker, 1859 stat. rev. with N. coelatalis Walker, 1859 comb. rev., Sagariphora Meyrick, 1894 stat. rev. with S. magnificalis (Hampson, 1893) comb. nov., and Tetracona Meyrick, 1884 stat. rev. with T. amathealis (Walker, 1859) comb. rev. and T. pictalis Warren, 1896 comb. rev. are removed from synonymy with Agrotera, as they lack the synapomorphies of Agrotera. Two new species, Agrotera genuflexa sp. nov. from Northern Territory, Queensland and New South Wales, and A. longitabulata sp. nov. from Queensland, are described. The taxonomic status of the Australian species of Agrotera is discussed, and a key to all species, based on males, is provided. The adults and genitalia of the new species and some related species are figured. 

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