Some stylet cercariae and a microphallid type in British freshwater molluscs

Parasitology ◽  
1967 ◽  
Vol 57 (4) ◽  
pp. 729-754 ◽  
Author(s):  
Alan W. Pike
Keyword(s):  
New Species ◽  
Digestive Gland ◽  
Flame Cell ◽  
Freshwater Molluscs ◽  
South Wales ◽  
Bithynia Tentaculata ◽  
Large Numbers

Cercaria helvetica XXXIII Dubois and the cercaria of Sphaerostoma bramae (Müll.) are redescribed and their metacercariae, which occur in various invertebrates, are described. Additional observations are made on C. parvus Khan and C. tarda Khan and their metacercariae, occurring mainly in arthropods, are described. C. wentloogensis sp.nov. has four pairs of penetration glands, a slender, thickened stylet 0·03 mm long and the flame-cell formula2[(2 + 2 + 2) + (2 + 2 + 2)].C. rumniensis sp.nov. has four pairs of penetration glands lying dorsally to the acetabulum, a slender thickened stylet 0·03 mm long and at least 20 flame cells arranged in pairs. C. octoglandulata sp.nov. is a virgulate species with four pairs of penetration glands, a partially thickened stylet 0·029–0·032 mm long and the flame-cell formula 2[(3 + 3 + 3) + (3 + 3 + 3)]. Each of these new species develops in sporocysts in the digestive gland of the prosobranch mollusc Bithynia tentaculata. A cercaria occurring in the digestive gland of B. tentaculata and assigned to the Microphallidae on the structure of its metacercaria is considered to encyst in the digestive gland without emerging. It bears no stylet or penetration glands and the cysts occur in the snail in exceedingly large numbers.All of these cercariae were found in freshwater molluscs collected at the Wentloog level near Cardiff, South Wales.

Studies on Larval Trematodes Infecting the Freshwater Molluscs of Llangorse Lake, South Wales: Part III. The Furcocercariae

1966 ◽  
Vol 40 (1-2) ◽  
pp. 91-114 ◽  
Author(s):  
Allan J. Probert
Keyword(s):  
New Species ◽  
Fresh Water ◽  
Freshwater Molluscs ◽  
South Wales

During a study of the larval trematodes infecting the fresh-water molluscs of Llangorse Lake, South Wales, twenty-one species of cercariae have been encountered. The present paper deals with the Furcocercariae. Six new species are described in detail and the remaining two compared with the description of previous workers.

Observations on the life-cycle of Psilotrema oligoon (Linstow, 1887) Odhner, 1913, and on the larval stages of two other psilostome trematodes

Parasitology ◽  
1968 ◽  
Vol 58 (1) ◽  
pp. 171-183 ◽  
Author(s):  
Alan W. Pike
Keyword(s):  
Life Cycle ◽  
Early Morning ◽  
Flame Cell ◽  
Larval Stages ◽  
South Wales ◽  
Bithynia Tentaculata ◽  
Zoology Department

The species described in this paper were found in Bithynia tentaculata from the Wentloog level, near Cardiff, South Wales. The larval stages of Psilotrema oligoon are redescribed and the taxonomy of the adults discussed. C. frondicola sp.nov. is a psilostome cercaria which has the probable flame-cell formula 2 [4 + 4 + 4 + 4 + 3 + 3] = 44. It emerges at night or during early morning, is positively phototactic and will not normally encyst on anything but vegetation. C. granocutis sp.nov. is also a psilostome cercaria; it is very small and has the probable flame-cell formula 2 [3 + 3 + 3 + 3 + 3] = 30. It emerges during the afternoon and will encyst freely on a variety of substrata.I thank Professor J. Brough of the Zoology Department, Cardiff, for the facilities provided, Dr D. A. Erasmus for supervising and encouraging this work and Dr S. M. Willmott, Director of the Commonwealth Bureau of Helminthology, for providing library facilities. This study was carried out during the tenure of a D.S.I.R. research studentship.

Studies on Larval Trematodes Infecting the Freshwater Molluscs of Llangorse Lake, South Wales Part I. The Xiphidio—and Microcercous Cercariae

1965 ◽  
Vol 39 (1) ◽  
pp. 35-52 ◽  
Author(s):  
Allan J. Probert
Keyword(s):  
New Species ◽  
Freshwater Molluscs ◽  
South Wales ◽  
Three New Species ◽  
First Time ◽  
Further Development ◽  
A New Species

During a three year survey of the larval trematodes of Llangorse Lake, South Wales, twenty-one species of cercariae have been encountered. The Xiphidio- and Microcercous cercariae are considered in this paper. Three new species of Xiphidiocercariae are described in detail and a fourth cercaria from this group is recorded from Britain for the first time. The further development of one of these cercariae has been considered. A new species of Microcercous cercariae is also described in detail.

Studies on Larval Trematodes Infecting the Freshwater Molluscs of Llangorse Lake, South Wales Part II. The Gymnocephalous Cercariae

1965 ◽  
Vol 39 (1) ◽  
pp. 53-66 ◽  
Author(s):  
Allan J. Probert
Keyword(s):  
New Species ◽  
Freshwater Molluscs ◽  
South Wales ◽  
Two New Species ◽  
First Time

During a three year study of the larval trematodes of Llangorse Lake, South Wales, twenty-one species of cercariae have been encountered. The present paper deals with four cercariae of the Gymnocephalous group. Two new species of Agilis cercariae are described in detail; Cercaria Sphaeridiotrema globulus is recorded from Britain for the first time and the occurrence of Cercaria lophocerca noted

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. 

Four New Species of Duonota Hill (Heteroptera: Schizopteridae)

1985 ◽  
Vol 33 (2) ◽  
pp. 263
Author(s):  
L Hill
Keyword(s):  
New Species ◽  
New South ◽  
New South Wales ◽  
South Wales

Duonota spathulata, sp. nov., and D. lumata, sp. nov., from the Atherton Tableland of north Queensland, and D. fusca, sp. nov., and D, decoricaudula, sp. nov., from New South Wales are described. A key to the 12 Duonota species is given and the relationships of the species discussed.

Macrofossil Casuarinaceae: their identification and the oldest macrofossil record, Gymnostoma antiquum sp. nov., from the late paleocene of New South Wales, Australia

1995 ◽  
Vol 8 (6) ◽  
pp. 1035 ◽  
Author(s):  
LJ Scriven ◽  
RS Hill
Keyword(s):  
New Species ◽  
Current Distribution ◽  
New South ◽  
New South Wales ◽  
Contributing Factors ◽  
Late Paleocene ◽  
South Wales ◽  
Papua New Guinean ◽  
A New Species

The oldest known Casuarinaceae macrofossils, from late Paleocene sediments at Lake Bungarby in New South Wales, are assigned to a new species of Casuarinaceae, Gymnostoma antiquum. The nearest living relatives of this species are the Papua New Guinean Gymnostoma species and in particular one as yet unnamed species. Previous problems relating to the preparation, identification and description of Casuarinaceae macrofossils are examined and clarified. The ecology of both living Gymnostoma and G. antiquum are discussed. The decrease in catastrophic disturbance and climate seasonality during the Cenozoic were probably major contributing factors leading to the current distribution of Gymnostoma.

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