Nemhelix bakeri n.gen., n.sp. (Nematoda: Cosmocercinae) parasite de l'appareil génital de Helix aspersa (Gastropoda: Helicidae) en France

1986 ◽  
Vol 64 (9) ◽  
pp. 2008-2011 ◽  
Author(s):  
S. Morand ◽  
A. J. Petter

Nemhelix bakeri n.gen., n.sp. (Cosmocercinae), from the genital tract of Helix aspersa Miiller (Helicidae) in France, is described. The new genus is characterized by a rounded oral opening without lips. The authors presume that the Cosmocercinae arose in amphibians and became parasites of molluscs secondarily and that the two species became molluscan parasites independently.

1985 ◽  
Vol 63 (11) ◽  
pp. 2684-2688 ◽  
Author(s):  
R. C. Ko ◽  
L. Margolis ◽  
M. Machida

Pseudascarophis kyphosi n.gen., n.sp. (Nematoda: Cystidicolidae) is described for specimens collected from the stomach of Kyphosus cinerascens (Forskål) from the southeast coast of Japan. The new genus is distinguished from all other genera of Cystidicolidae by its oral structure (presence of four submedian, longitudinally directed, digitiform processes in the buccal cavity projecting slightly beyond the oral opening; smooth margined mouth; absence of submedian labia and sublabia; and unique shape of the medial region of the pseudolabia) and numbers of caudal papillae in the male (3 pairs preanal, 7 pairs postanal).


2017 ◽  
Vol 15 ◽  
pp. 18-20 ◽  
Author(s):  
K. Diop ◽  
O. Mediannikov ◽  
D. Raoult ◽  
F. Bretelle ◽  
F. Fenollar

Nematology ◽  
2014 ◽  
Vol 16 (8) ◽  
pp. 953-962
Author(s):  
Oleksandr Holovachov ◽  
Sven Boström

The new genus and species Yeatesinia barbata gen. n., sp. n. is described from a sand dune habitat in New Zealand. The new genus is characterised by a body length of 299-357 μm in females and 304-361 μm in males, lip region rounded dorso-ventrally, broad laterally, dorsally inclined, lateral sides of lip region with two large, horn-like, projections, each bearing one seta at its base, each amphid surrounded by three setiform sensilla, oral opening a broad transverse slit located on the dorsal body surface, and different structure of cuticle in the dorsal and ventral body sectors. This combination of unique morphological characters clearly separates the new genus from all other members of the Plectidae. The phylogenetic affinities of Yeatesinia gen. n. and its relationships to other genera of the family Plectidae are discussed.


2018 ◽  
Vol 18 ◽  
pp. 115-119
Author(s):  
Mehmet Zeki Yildirim ◽  
Seval Bahadir Koca ◽  
Mustafa Emre Gürlek ◽  
Peter Glöer

A new hydrobiid genus and species Isparta felei n. gen. n. sp. is described from Isparta province of Turkey. Samples were collected in 2017. The morphology of the shell, male and female genital tract of the new species are described. Moreover the similarity and distinctness with the genus Pseudohoratia are also given.


1988 ◽  
Vol 66 (8) ◽  
pp. 1796-1802 ◽  
Author(s):  
Serge Morand

The development and transmission of Nemhelix bakeri Morand et Petter, a parasite of the genital tract of Helix aspersa Müller, are described. Free stages of this nematode were not found and laboratory infestations were not successful. The parasites were observed with snail spermatophores exchanged during copulation. Young snails were not infected. The larval stages of N. bakeri differ from those of C. Dukae. Only the L2 stage has lips in N. bakeri, while all larval stages of C. dukae, except the L3 stage, have some. Paleontologie and biogeographic data accredit the thesis of a secondary evolution of Cosmocercidae in land snails. It seems that this evolution occurred independently, in North America for C. dukae and in Europe for N. bakeri.


Nematology ◽  
2001 ◽  
Vol 3 (3) ◽  
pp. 237-241 ◽  
Author(s):  
Wasim Ahmad ◽  
Dieter Sturhan

AbstractThe dorylaimid genus Cricodorylaimus gen. n. with the species C. africanus sp. n. is described from arable soil in Benin. The new genus with the only known species is distinctive in having a short obese body with strongly annulated subcuticle, cuticularised pieces around the stoma and a monoprodelphic female genital tract. It differs from all known genera in the family Qudsianematidae in the nature of its subcuticle and in being monoprodelphic.


Author(s):  
R. L. Reeder ◽  
S. H. Rogers ◽  
W. A. Shannon

Numerous morphological studies have dealt with the spermatheca of pulmonate gastropods. This globular organ, which is attached to the female portion of the reproductive tract by a long duct in these monoecious animals, has had various functions ascribed to it. Recent histochemical demonstrations of deoxyribonuclease, ribonuclease, protease, and acid phosphatase have provided, however, conclusive evidence that it is a digestive organ for the degradation of superfluous sperm and genital tract secretions. Only limited information concerning the spermatheca is available at the ultrastructural level, a fact providing the stimulus for the present study of this organ in Sonorella santaritana, a desert mountain snail from Arizona.


1976 ◽  
Vol 87 (5) ◽  
pp. 289-292
Author(s):  
J. T. Williams ◽  
A. J. Scott ◽  
B. V. Ford-Lloyd
Keyword(s):  

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