Foraminifera taxon details

Sigmopyrgo Hofker, 1983

531979  (urn:lsid:marinespecies.org:taxname:531979)

accepted
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marine, brackish, fresh, terrestrial
Hofker, J. (1983). Zoological exploration of the continental shelf of Surinam: the Foraminifera of the shelf of Surinam and the Guyanas. <em>Zoologische Verhandelingen.</em> 201(1): 1-75., available online at https://repository.naturalis.nl/pub/317864/
page(s): p. 26 [details]  Available for editors  PDF available [request] 
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2024). World Foraminifera Database. Sigmopyrgo Hofker, 1983. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=531979 on 2024-03-28
Date
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by
2010-10-14 08:26:32Z
created
2013-03-08 15:09:52Z
changed
2014-04-10 07:43:33Z
changed
2018-11-19 17:05:40Z
changed

original description Hofker, J. (1983). Zoological exploration of the continental shelf of Surinam: the Foraminifera of the shelf of Surinam and the Guyanas. <em>Zoologische Verhandelingen.</em> 201(1): 1-75., available online at https://repository.naturalis.nl/pub/317864/
page(s): p. 26 [details]  Available for editors  PDF available [request] 

additional source Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp., available online at https://books.google.pt/books?id=n_BqCQAAQBAJ [details]  Available for editors  PDF available [request] 
From editor or global species database
Diagnosis Test large, up to 1.5 mm in diameter, subglobular, megalospheric test biloculine throughout, microspheric test with numerous chambers one-half coil in length, arranged in varying planes in the early stage to result in a sigmoid series for up to as many as eighteen or nineteen chambers, later chambers planispiral and alternately added on opposite sides as in Pyrgo, chambers without floors but added against the previous test surface; wall thick, calcareous, porcelaneous, peripheral margin crenulate; aperture at the end of the final chamber, a broad low sinuate arch, with a similarly broad low flaplike tooth that may be slightly indented in the median plane to appear almost bifid, aperture bordered by an irregularly thickened rim. Holocene; Atlantic; Caribbean; central Pacific. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]