Results 241 to 250 of about 68,902 (263)
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Components of mucus of terrestrial slugs (Gastropoda)
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1983Mucous secretion by the body wall of the terrestrial slugs (Ariolimax columbianus, Arionidae; and other species) was found to involve at least three distinct stages--release of vesicles, formation of granules, and organization of strands. Mucus is stored intracellularly in membrane-bound vesicles, and these are shed intact from the mucous cells ...
Arthur W. Martin +2 more
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Neurosekretion bei Heliciden (Gastropoda) [PDF]
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1963 1. Alle Nervenzellen im Schlundring der untersuchten Heliciden konnen sekretorisch tatig sein. 2. Es werden zwei Zelltypen beschrieben: Zellen vom Typ I mit granularem Sekret; es wird bevorzugt am Achsenfaserkonus gespeichert; Zellen vom Typ II mit feingranularem Sekret, das das gesamte Zytoplasma fast immer ausfullt.
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Molecular phylogenetics of Caenogastropoda (Gastropoda: Mollusca)
Molecular Phylogenetics and Evolution, 2007Caenogastropoda is the dominant group of marine gastropods in terms of species numbers, diversity of habit and habitat and ecological importance. This paper reports the first comprehensive multi-gene phylogenetic study of the group. Data were collected from up to six genes comprising parts of 18S rRNA, 28S rRNA (five segments), 12S rRNA, cytochrome c ...
Winston F. Ponder +3 more
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Expansion of the Foot in Bullia (Gastropoda)
Nature, 1962SANDY-BEACH gastropods of the family Naticidae and of the genus Bullia (family Nassariidae) are capable of a remarkable expansion of the foot. So great is this expansion that it has often been suggested that the turgor of the foot is not due to haemolymph alone but also to water from the surrounding medium which is supposedly introduced into the foot ...
A. C. Brown, L. G. W. Turner
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The Phylogenic Stage of the Cambrian Gastropoda
The Journal of Geology, 1903(WITH PLATES I AND II.) WHETHER it is due to imperfection of the geologic record of the Cambrian age, or whether it is because the class Gastropoda was at that time small and at an initial stage of its differentiation, the species of that age, as known to us, are few, simple-structured, and little diverse, as compared with those of later geologic ages.
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Biodiversity of Gastropoda in European floodplains
River Systems, 1996Obrdlik, Petr +2 more
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