(Fischerina communis)

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Fischerina communis (Plesiotype 1 from sample Bioice2099: depth 112 m; bottom water temp. 4,88°C; loc. 66,6256°N, -18,2475°W Dec.Degr. Plesiotype 2 from sample Bioice2128: depth 203 m; bottom water temp. 2,7°C; loc. 66,9839°N, -18,8436°W Dec.Degr. Plesiotype 3 (equatorial section) from sample Bioice2126: depth m; bottom water temp.°C; loc.°N, -°W Dec.Degr. Plesiotype 4 (cross section) from sample Bioice2934: depth 412 m; bottom water temp. 6,34°C; loc. 66,0156°N, -26,7914°W Dec.Degr. – Ljósm. Guðmundur Guðmundsson

Almennt

Fischerina communis (Seguenza, 1880) 

Fischerina communis (Seguenza, 1880) – sensu Jones, R.W., 1994. The Challenger Foraminifera, The Natural History Museum, London, Oxford Univ. Press: p. 112-113, Pl.114, figs. 4-7.

Description: Initial part is discoidal, with sharp to rounded periphery, later rectilinear or flaring. Initial chamber arrangement is an undivided planispiral tube of several windings; then the spiral tube is divided into segments, some of which are slightly inflated at the aboral end and tapering towards the apertural end, similar to Cornuloculina; the length of the planispiral segments are initially of about half of whorl in length, becoming successively shorter in the latest windings. About half of the available specimens have rectilinear or flaring chambers. In the spiral part of the test the aperture is a constricted to s simple round opening, but is a narrow elongated slit in the flaring part, bordered with a slightly raised lip. The walls are thick and laminated; surface is rather coarse and matt, with traces of striations in the largest specimens. Length of largest rectilinear specimen is 3,5 mm but most are about 1 mm in diameter. 35 specimens were picked from 18 of the 1031 Bioice samples that were checked for forams.

Gudmundur Gudmundsson, IINH (gg@ni.is)

Útbreiðslukort

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Útbreiðsla Fischerina communis (Bioice samples, red dots; miscellaneous IINH samples, blue dots)

Myndir

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Hæð stöpla svarar til fjölda sýna þar sem tegundin er: fágæt (1-2 eintök); sjaldgæf (3-8 eintök); alltíð (9-32 eintök); algeng (>32 eintök). Gögn úr botndýraverkefninu (Bioice). (ENGLISH- Column height represents number of samples in bins where the species is: rare (1-2 specimens); occasional (3-8 specimens); common (9-32 specimens); and abundant (>32 specimens.) Data from the Bioice programme.) – Ljósm. Guðmundur Guðmundsson
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Dreifing tegundar eftir dýpi, seltu og sjávarhita, innan þess breytileika sem allar sýnatökustöðvar ná yfir, sýnt sem heildarspönn lóðréttra ása. Gögn úr botndýraverkefninu „BIOICE“. (ENGLISH – Occurrence zone of the species within the range of water depth, temperature, and salinity, spanned by the "Bioice" samples; demarcated by respective y-axes.) – Ljósm. Guðmundur Guðmundsson

Biota

Ríki (Kingdom)
Einfrumungar (Protista)
Fylking (Phylum)
Götungar (Foraminifera)
Ættbálkur (Order)
(Miliolida)
Tegund (Species)
(Fischerina communis)