Hanzawaia Asano 1944

Schönfeld, Joachim & Lübbers, Julia, 2020, Checklist, assemblage composition, and biogeographic assessment of Recent benthic foraminifera (Protista, Rhizaria) from São Vincente, Cape Verdes, Zootaxa 4731 (2), pp. 151-192 : 161

Genus Hanzawaia Asano 1944

Hanzawaia bertheloti (d’Orbigny) = Rosalina bertheloti d’Orbigny 1839c, p. 135 , pl. 1, figs. 28–29 [Plate 3, Fig. 6, Plate 4, Fig. 2 ]. ” Discorbinella bertheloti ” Jones (1994) , p. 95, pl. 89, figs. 10–12. Non Parker (1954), p. 523, pl. 8, figs. 22,23, non Redois & Debenay (1999), pl. 2, figs. 3a, b, non Milker & Schmidl (2012), p. 104, figs. 23.29–30 (= Hanzawaia concentrica ). Note: the species has often been mistaken with Hanzawaia concentrica ( Cushman 1918) , which is very similar in shape and chamber arrangement. The last 4 to 5 chambers of the latter species extend into triangular, axe-shaped flabs on the umbilical side, each off set from the previous, and thereby forming a rosette collar around the umbilicus. This feature is poorly developed in the present species. The flabs are only recognisable at very high microscope magnifications. Consequently, umbilical flabs neither have been mentioned nor drawn by d’Orbigny (1839). The specimens figured by Brady (1884) also show no flabs, thus mirroring the 19 th century view of this species. Furthermore, d’Orbigny‘s Rosalina bertheloti is much more compressed than the holotype of Hanzawaia concentrica ( Cushman 1918) .

Figures

FIGURE 2. Species in common with source regions in the tropical to temperate North Atlantic. See Appendix Table 2 for references.