USNM 540930-794.jpg
USNM 540931-794.jpg
USNM 540932-794.jpg
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.
USNM 540930-794.jpg
USNM 540931-794.jpg
USNM 540932-794.jpgLinked specimens: USNM-540930 USNM-540932 USNM-540931
Current identification/main database link: Microhedbergella pseudoplanispira Huber & Leckie 2011
Original Description
Test wall microperforate, pores randomly
scattered and averaging 0.9 mm in diameter, wall surface
smooth. Test small, very low trochospiral, equatorial
periphery rounded, weakly lobate in equatorial outline;
chambers subglobular, increasing slowly in size, ultimate:
penultimate chamber ratio averaging 1.05, dextrally or
sinistrally coiled in 2 whorls with 6.5 to 7 chambers in the
final whorl; sutures moderately depressed in last several
chambers, weakly depressed to flush on earlier chambers,
radial on umbilical and spiral sides; umbilicus shallow,
comprising 26 to 30% of the test diameter; aperture an
extraumbilical low arch that extends from near the
equatorial peripheral margin nearly to the umbilicus,
bordered by a narrow lip, with relict apertural lips
surrounding the umbilicus.
Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gsReferences:
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Microhedbergella pseudoplanispira compiled by the pforams@mikrotax project team viewed: 11-12-2019
Short stable page link: http://mikrotax.org/pforams/index.php?id=131870 Go to Archive.is to create a permanent copy of this page - citation notes |