Qualitative Observations on Recent Foraminiferal Tests with Emphasis on the Eastern Pacific, Part 2
University of Southern California, 1977 - Foraminifera - 1078 pages
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acute angular apertural arch arcuate base biconvex bifid broad broadly rounded calcareous California carinate Catalina closed comparatively compressed contour convex costae curved Cushman D'Orbigny differs distinct Distribution dorsal side elongate end view evolute extended face finely perforate flat flush genus gradually half Holotype AHF hyaline Hypotype illustrated imperforate increasing inflated involute irregular Island lacks last formed chamber last formed whorl length less limbate lobulate longitudinal margin Mexico miles minute narrow neck opaque opening organization of chambers ovate Paratype AHF periphery rounded planispiral planoconvex Plate Point polished porcelaneous present present species prominent quinqueloculine radiate records seems shallow waters shape sharply defined short showing Size slightly slit smooth species specimens spiral Station structure suggests surface sutures depressed tapered Test free texture thick tooth trochospiral truncate Type Locality uniform ventral side visible wall whorl width