Foraminifera taxon details

Marginopora Quoy & Gaimard in Blainville, 1830

382446  (urn:lsid:marinespecies.org:taxname:382446)

accepted
Genus
Orbitolites (Marginopora) Yabe & Hanzawa, 1929 · unaccepted (Opinion of Loeblich & Tappan, 1987)

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marine, brackish, fresh, terrestrial
feminine
Blainville, H. M. Ducrotay de, 1830, Dictionnaire des Sciences Naturelles, zooph.- zyt, vol. 60. Paris: E G. Levrault. , available online at https://www.biodiversitylibrary.org/page/25318724
page(s): p. 377 [details]   
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2021). World Foraminifera Database. Marginopora Quoy & Gaimard in Blainville, 1830. Accessed at: http://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=382446 on 2024-03-28
Date
action
by
2009-02-09 12:27:56Z
created
2010-10-04 12:33:20Z
changed
2013-03-08 15:09:52Z
changed
2014-04-10 07:43:33Z
changed
2019-05-08 12:58:06Z
changed
2020-03-09 20:53:26Z
changed

original description Blainville, H. M. Ducrotay de, 1830, Dictionnaire des Sciences Naturelles, zooph.- zyt, vol. 60. Paris: E G. Levrault. , available online at https://www.biodiversitylibrary.org/page/25318724
page(s): p. 377 [details]   

basis of record Integrated Taxonomic Information System (ITIS). , available online at http://www.itis.gov [details]   

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] 
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
From editor or global species database
Diagnosis Test discoidal, large, biconcave with thickened periphery, megalospheric test up to 11 mm in diameter; juvenarium formed before release of the embryo from the parent test consists of proloculus, spiral passage, and larger deuteroloculus with numerous pores; microspheric test up to 30 mm in diameter, with small early planispiral and peneropline stage and later cyclic chambers, subdivided by short vertical septula that project inward for a short distance from the flat sides of the test to form a narrow marginal zone, leaving open a wide central passage that contains irregular or incomplete central partitions or pillars, chamber floor of marginal zone offset a half chamber height from that of the median zone, oblique stolons connect the lateral chamberlets to the chambers above and below, larger specimens commonly have a central hole in the test where the thinner-walled early portion is missing, probably due to resorption by the individual, finally the adult produces four to nine higher, cyclic, and undivided reproduction chambers with a coarsely porous outer margin, up to one hundred fifty new embryos may form in the brood chamber and are released by bursting through the coarsely perforate outer wall; wall calcareous, imperforate, porcelaneous, consisting of about 12.5 percent magnesium calcite; aperture of numerous small circular openings randomly scattered over the peripheral wall, and remaining as intercameral pores that diagonally connect successive chambers; endosymbiotic dinoflagellates present. Miocene to Holocene; Pacific and Indian Oceans. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]