original description
Brünnich, M.T. (1771–1772). <i>Zoologiae fundamenta praelectionibus Academicis accomodata</i>. Hafniae et Lipsiae. 253 [+ 1] pp. , available online at https://www.biodiversitylibrary.org/page/29565699
page(s): p. 232 [details]
basis of record
Gross, O. (2001). Foraminifera, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 60-75 (look up in IMIS) [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
additional source
Hayward, B. W.; Holzmann, M.; Grenfell, H. R.; Pawlowski, J.; Triggs, C. M. (2004). Morphological distinction of molecular types in Ammonia - towards a taxonomic revision of the world's most commonly misidentified foraminifera. <em>Marine Micropaleontology.</em> 50: 237-271. [details] Available for editors
From editor or global species database
Diagnosis Test biconvex, with low trochospiral coil of 3 to 4 volutions, spiral side evolute, umbilical side involute and may have large umbilical plug surrounded by umbilical fissure, final whorl with deeply incised umbilical, radial, and intraseptal spaces, sutural fissures straight or branching and appear feathered on the umbilical side, umbilical and intraseptal spaces of earlier whorls filled by secondary lamellae, leaving only one vertical passage from each chamber of the penultimate whorl to the junction of the umbilical fissure and intraseptal space of the final whorl, early chambers closed toward umbilicus, no spiral canal present, periphery rounded to carinate; wall calcareous, optically radial, primarily bilamellar, moderately coarsely perforate, both surfaces may be ornamented by pillars and umbilical side may have transverse ridges resulting from the feathered umbilical sutures when these are present; primary aperture an interiomarginal extraumbilical arch, bordered by a protruding lip at the umbilical end, space between the lip and umbilical pillars may be filled by secondary lamellae as new chambers form. L. Miocene to Holocene; cosmopolitan. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification) [details]
Diagnosis Fgdre [details]
From editor or global species database