WoRMS Photogallery
Pseudorbitoides trechmanni subsp. pectinata Krijnen, 1972
Description Krijnen, J. P. (1972). Morphology and phylogeny of pseudorbitoid Foraminifera from Jamaica and Curaçao, a revisional study. Scripta Geologica. 8: 1-77., available online at http://www.repository.naturalis.nl/record/317459page(s): p. 49, pl. 22 (pl. 22 fig. 2).
Figs. 1-4, 6: Central horizontal sections of megalospherical forms, showing the rather small size of the embryo, despite the advanced evolutionary stage (quadriserial juvenaria). Surrounding the juvenarium the cyclical phase clearly shows early arcuate chambers devoid of radial elements, or divided by very delicate radial elements, and followed by younger chambers, arranged in more or less radial rows, separated by prominent radial plates. New radial plates are seen to be intercalated where radial rows of equatorial chambers bifurcate (a).In a later stage inthe cyclical phase, the arrangement of equatorial chambers becomes more or less annular (figures 2 to 4). As holotype is chosen specimen no.: J 3680-61, illustrated by figure 2. Specimen nrs.: Fig. 1: J 3680-717 (65X); Fig. 2: J 3680-61 (34χ); Fig. 3: J 3680-190 (44x); Fig. 4: J 3680-107 (39x); Fig. 6: J 3680-647 (67χ). Fig. 5: Central horizontal section of a microspherical specimen, showing the zone of undivided arcuate chambers (b), as well as the younger chambers with radial elements (c). Specimen no.: J 3680-3 (25X). PNG file - 553.80 kB - 597 x 871 pixels added on 2026-09-2335 viewsWoRMS taxa Pseudorbitoides trechmanni subsp. pectinata Krijnen, 1972 † accepted as Radiorbitoides pectinatus (Krijnen, 1972) †checked Le Coze, François 2026-09-23
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