The dimorphic, alveolinid genus has large, nautiloid to subspheric test with imporforate, percellaneous calcareous wall. The spheric, large megalosphere and the small microsphere are followed by one cycles of triloculine chambers in the megalospheric and two cycles of quinqueloculine undivided early chambers in the microspheric forms. The following planispiral adult chambers are subdivided by aligned septula into numerous small chamberlets. The planispiral whorls increase rapidly in height as added, so that the adult test uncoil and become flabelliform in the microspheric generation. The chambers in the flabelliform stage are subdivided by numerous incomplete subepidermal partitions. The main aperture (intercameral foramina) located at the middle part of the septa recognized best in the equatorial sections. The planispiral chambers has one row of alveols which are connected with preseptal passage of preceding chamber by intercalar foramina (as keyholes-shaped) in the septum. The connection between the flabelliform adult chambers provide by the numerous openings (cribrate). Occasionally, the uncoiled chambers develope at the both sides of the test

Sirel, E. (2013). Description of two new families, three new species and re-description of four known genera and one subfamily from the larger benthic foraminifera of Paleocene In Turkey. <em>Bulletin of the Mineral Research and Exploration Institute of Turkey.</em> 146: 27-53. available online at https://dergi.mta.gov.tr/article/show/57.html Available for editors   [request]

2026-08-17 09:09:46Z

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