Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa)

Cover of: Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa) | Colin Gerald Ogden

Published by British Museum (Natural History) in London .

Written in English

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Subjects:

  • Difflugia -- Great Britain

Edition Notes

Bibliography: p. 69-73.

Book details

StatementColin G. Ogden.
SeriesBulletin of the British Museum (Natural History). Zoology series -- v. 44, no. 1, Bulletin of the British Museum (Natural History) -- v. 44, no. 1
ContributionsBritish Museum (Natural History)
The Physical Object
Pagination73 p. :
Number of Pages73
ID Numbers
Open LibraryOL17353874M

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Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa) Vol Page 1 Cirolana cranchi Leach, (Crustacea: Isopoda:. Members of genus Difflugia have been classically defined by their shells that are always composed of mineral particles and diatoms embedded in sheet-like organic cement secreted by the amoebae.

Notably, D. urceolata is one of the most widely reported species of the genus Difflugia, probably due to its large size and distinctive shape.

To permit correct identification to species level, the description of a new taxon should comprise information not only on characters of the shell (if possible by light and scanning electron microscopy) but also on characters of the cell and biometrical by:   Ogden CG () Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa).

Bull Br Mus nat Hist (Zool) –73 Google Scholar Ogden CG, Hedley RH () An atlas of freshwater testate by: 2. Insect Systematics and Evolution Weingartner, E., N. Wahlberg, & S. Nylin. Speciation in Pararge (Satyrinae: Nymphalidae) butterflies - North Africa is the source of ancestral populations of all Pararge species.

Systematic Entomology   From inside the shell Blog of the International Society for Testate Amoeba Research (ISTAR) Menu. Difflugia oblonga. OGDEN C.G.,Observations on the systematics of the genus Difflugia in Britain.

– Bull. Mus. Nat. Hist. The present paper adds data on five species of the genus Difflugia from the much polluted waters of the Tiete River.

These observations extend species circum- scriptions, and bring new light to bear on the morphology, biometry, ecology and distribution of Difflugia. Ogden CG () Observations of the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa). Bull Br Mus Nat Hist (Zool) –73 Google Scholar Ogden CG, Ellison RL () The value of the organic cement matrix in the identification of the shells of fossil testate by: (lb): Comparative morphology of some pyriform species of Difflugia (Rhizopoda).

Arch. Protistenkd. (): Shell structure in some pyriform species of Difflugia (Rhizopoda). Arch. Protistenkd. (): Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa).

Bull. by: Gauthier-Lièvre & Thomas () in their survey of the African species have divided the genus Difflugia into ten artificial groups based on the morphology of the test: lobed, collared, compressed, urceolate, globose, ovoid-globose, elongate, acute angled, horned and pyriform.

The size of Difflugia spp. ranges from 15 µm up to more than µm. The species accounts provide additional characters for identification, along with observation tips, indicating the habitat and habits of the species. A distribution map and flight diagram are given, based on the large dataset that resulted from the extensive British hoverfly recording scheme, which has been led by the authors for many : Menno Reemer.

One of the more than species in this genus is the "slender riccia" (Riccia fluitans), which grows on damp soil or, less commonly, floating in ponds, and is sometimes used in aquariums.

The sporophyte of Riccia is the simplest amongst bryophytes. It consist of only a capsule, missing both foot and seta, and does not perform : Marchantiopsida.

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Sci. Rep Cited by: 5. Observations on the systematics of the genus Difflugia in Britain (Rhizopoda, Protozoa): Bulletin of the British Museum of Natural History (Zoology), Ogden, C.G. Notes on testate amoebae (Protozoa: Rhizopoda) from Lake Vlasina, Yugoslavia: Bulletin of the British Museum of Natural History (Zoology), Ogden, C.G.

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Nebela Nebela Leidy, (ref. ID; Cash () noted that the spines were seldom seen on specimens from Britain. From our observations we suggest that this was due mainly to their fragility, as they are easily lost in handling.

This type of test material would, in itself, be enough to remove the organism from the genus Difflugia. Notes on the Genera Alaria, Diathema, Dicroloma, &C.; Being A Supplement to "An Attempt at a Revision of the Strombidae and Aporrhaidae",American Journal of Conchology, American Journal of Conchology, Volume 5, Number 1: pages by Gabb, W.

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Literature Cited. The literature cited here includes all references to the type descriptions and major studies, primarily post-Tebble, that have influenced the systematics.

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