WoRMS taxon details
Phthanotrochus Arnold, 1978
520891 (urn:lsid:marinespecies.org:taxname:520891)
accepted
Genus
Phthanotrochus arcanus Arnold, 1978 (type by original designation)
marine, brackish, fresh, terrestrial
Arnold, Z. M. (1978). Biological evidence for the origin of polythalamy in foraminifera. <em>The Journal of Foraminiferal Research.</em> 8(2): 147-166., available online at https://doi.org/10.2113/gsjfr.8.2.147
page(s): p. 161 [details]
page(s): p. 161 [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2025). World Foraminifera Database. Phthanotrochus Arnold, 1978. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=520891 on 2025-05-27
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Nomenclature
original description
Arnold, Z. M. (1978). Biological evidence for the origin of polythalamy in foraminifera. <em>The Journal of Foraminiferal Research.</em> 8(2): 147-166., available online at https://doi.org/10.2113/gsjfr.8.2.147
page(s): p. 161 [details]
page(s): p. 161 [details]
Other
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 
[request]
[request]From editor or global species database
Diagnosis Test small, commonly 100µm to 120µmin diameter, with rounded to ovoid proloculus, later may become biloculine or multilocular, and chambers may be trochospirally enrolled or uncoiling or irregularly arranged; wall colorless, membranous, transparent, proteinaceous; aperture terminal, rounded, may have pronounced neck and prominent entosolenian tube; pseudopodia granular, filose and reticulose; multinucleate, nuclei about 6 µm in diameter; both unilocular and multilocular individuals may produce abundant amoeboid gametes and undergo sexual reproduction. Living specimens may be deeply buried in accretionary mass of debris and food particles. Holocene; intertidal region; USA: Monterey Bay, California. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
