This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Polycamerella tardata Huber et al 2022 = Polycamerella tardata |
Current identification/main database link: Polycamerella Huber & Petrizzo, in Huber et al 2022
Type of wall: Finely perforate with pores averaging 1.9 mm and ranging from 1.1–2.4 mm, wall surface with randomly scattered, fine muricae. Test morphology: Test planispirally coiled, biumbilicate, moderately evolute with a relatively broad, shallow umbilicus (UD:TD ratio average 0.31), equatorial outline weakly lobate, subcircular in peripheral outline with a rounded to subrounded peripheral margin, symmetrical in edge view, always biapertural; chambers weakly inflated, enlarging very slowly in size (y = 0.092x + 1.77) with uniform, log-linear growth throughout ontogeny (text-figs. 4a, 4e, 6), 22–23 total chambers in adult specimens usually coiled in 2.5 whorls (e.g., Pl. 21, Figs. 1c, 2c, 5c), average of 7.7 chambers and range of 7.0–8.5 chambers in the final whorl (Table 1), kummerform chambers rare (UCL:PCL ratio average 1.0); sutures slightly curved, weakly depressed; final chamber biapertural with a low arch or slit opening into the umbilicus, may show inward flexure along suture (Pl. 21, Figs. 1a, 3a, 5a, 6a, 8, 9a), bordered by a narrow, imperforate flap that extends into the umbilicus connecting with previous chambers, and may become outwardly folded and tubular shaped (e.g., Pl. 21, Figs. 1a, 3a, 5a, 6a, 11); relict apertures and apertural flaps visible surrounding the umbilicus.
Original Description
Size:
Etymology:
Huber, B. T., Petrizzo, M. M. & Falzoni, F. (2022b). Taxonomy and phylogeny of Albian–Maastrichtian planispiral planktonic foraminifera traditionally assigned to Globigerinelloides. Micropaleontology. 68(2): 117-183. gsReferences:
Polycamerella compiled by the pforams@mikrotax project team viewed: 11-10-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=132770 Go to Archive.is to create a permanent copy of this page - citation notes |
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