Results 191 to 200 of about 10,179 (217)
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Molecular phylogeny of Paraonidae (Annelida)
Molecular Phylogenetics and Evolution, 2019A molecular phylogeny of the family Paraonidae was reconstructed on the basis of 16S rDNA, COI and 18S rDNA sequences obtained from 66 individuals belonging to 38 nominal species and subspecies. In agreement with previous findings, Paraonidae represent a monophyletic group, closely related to Sternaspidae.
Langeneck, Joachim +3 more
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1919
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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2008
Nella lista seguente sono elencate le specie di policheti segnalate in Italia; vengono riportate 876 specie appartenenti a 71 famiglie della classe Polychaeta. Rispetto alla precedente edizione della Checklist della fauna italiana (Castelli et al., 1995) si può osservare un incremento di oltre 50 specie, ampiamente superiore al 5% del totale delle ...
A. Castelli +11 more
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Nella lista seguente sono elencate le specie di policheti segnalate in Italia; vengono riportate 876 specie appartenenti a 71 famiglie della classe Polychaeta. Rispetto alla precedente edizione della Checklist della fauna italiana (Castelli et al., 1995) si può osservare un incremento di oltre 50 specie, ampiamente superiore al 5% del totale delle ...
A. Castelli +11 more
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Molecular phylogeny of the Annelida
Canadian Journal of Zoology, 2000Traditionally, the Annelida has been classified as a group comprising the Polychaeta and the Clitellata. Recent phylogenetic analyses have led to profound changes in the view that the Annelida, as traditionally formulated, is a natural, monophyletic group.
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2021
The Annelida is a large phylum, with over than 22,000 species, including ragworms, earthworms, and leeches. They are adapted to various environments. Some species exist in and have adapted to marine environments, others in fresh water, and yet others in moist terrestrial environments. Freshwater Annelids are classified into the following subgroups:
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The Annelida is a large phylum, with over than 22,000 species, including ragworms, earthworms, and leeches. They are adapted to various environments. Some species exist in and have adapted to marine environments, others in fresh water, and yet others in moist terrestrial environments. Freshwater Annelids are classified into the following subgroups:
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Photoreceptor cells and eyes in Annelida
Arthropod Structure & Development, 2006The evolution of photoreceptor cells and eyes in Metazoa is far from being resolved, although recent developmental and morphological studies provided strong evidence for a common origin of photoreceptor cells and existence of sister cell types in early metazoans.
Günter Purschke +3 more
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2013
The phylum of segmented worms (Annelida) contains truly metameric animals. Their body consists of similar ‘rings’ that are alike not only concerning their appearance but also their inner structure. The epithelium of annelids composes a functional unit together with the muscle fibres beneath.
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The phylum of segmented worms (Annelida) contains truly metameric animals. Their body consists of similar ‘rings’ that are alike not only concerning their appearance but also their inner structure. The epithelium of annelids composes a functional unit together with the muscle fibres beneath.
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On the geographical distribution of the Annelida
Annals and Magazine of Natural History(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Comments on the evolution of the Annelida
Hydrobiologia, 1984The structure of the male ducts and their relative positions are significant indicators of the fact that the Lumbriculidae do not represent the stem forms of the Oligochaeta, confirming the recently expressed opinion of Hrabě (1983). However, the same arguments provide the basis for the separation of Dorydrilus in the family Dorydrilidae.
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1975
Bilateria in which:- 1. A perivisceral coelom is characteristically present though it may be partly or wholly replaced by a perivisceral haemocoel. 2. There is no parenchyma, the organs usually being suspended in the coelom by folds of the coelomic epithelium. 3.
J. A. Wallwork, J. H. Elgood, J. E. Webb
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Bilateria in which:- 1. A perivisceral coelom is characteristically present though it may be partly or wholly replaced by a perivisceral haemocoel. 2. There is no parenchyma, the organs usually being suspended in the coelom by folds of the coelomic epithelium. 3.
J. A. Wallwork, J. H. Elgood, J. E. Webb
openaire +2 more sources