Haplophragmoides walteri ( Grzybowski, 1898 )

Benedetti, A, 2017, Eocene / Oligocene deep-water agglutinated foraminifers (DWAF) assemblages from the Madonie Mountains (Sicily, Southern Italy), Palaeontologia Electronica 20 (1), pp. 1-66 : 40

Haplophragmoides walteri ( Grzybowski, 1898)

Figure 18.14-16

1898 Trochammina walteri ; Grzybowski, pl. 11, fig. 31.

1960 Haplophragmoides walteri (Grzybowski) ; Geroch, p. 49, pl. 5, fig. 5.

2005 Haplophragmoides walteri (Grzybowski) ; Kender, Kaminski, and Cieszkowski, p. 266, fig. 13A.

2009 Haplophragmoides walteri (Grzybowski) ; Kender, Kaminski, and Jones, p. 500, pl. 5, fig. 9.

Material. 36 specimens from 16 samples.

Description. Test free, subcircular in outline, planispirally involute coiled, sutures incise. Chambers subtriangular, compressed near the periphery. Wall thin, finely agglutinated, surface smooth.

Distribution. Cosmopolitan species recorded from the Late Cretaceous to middle Miocene ( Kender et al., 2009).

Remarks. In this taxon we include typical H. walteri morphotype, and the H. walteri - H. carinatus transitional forms common at the base of the Oligocene. At Portella Colla H. walteri is totally substituted by H. carinatus in the late Rupelian.

Figures

FIGURE 18. Scanning electron micrographs of Trochamminoidae (1-10) and Haplophragmoididae (11-27) from the Caltavuturo Formation cropping out at Portella Colla. 1, Trochamminoides septatus (Grzybowski, 1898), PC060604. 2, Trochamminoides proteus (Karrer, 1866), PC060621. 3, Trochamminoides cf. proteus (Karrer, 1866), PC060624. 4, Trochamminoides velascoensis Cushman, 1926, PC11. 5, Trochamminoides intermedius (Grzybowski, 1896), PC060621. 6, Trochamminoides variolarius (Grzybowski, 1898), MM14. 7, Trochamminoides sp. 1, PC060603. 8, Trochamminoides sp. 2, PC060604. 9, Trochamminoides sp. 3, PC060618. 10, Trochamminoides sp. 4, PC18. 11-13, Haplophragmoides carinatus Cushman and Renz, 1941, PC060621 (11), PC060621 (12) and PC060624 (13). 14-16, Haplophragmoides walteri (Grzybowski, 1898), PC18 (14), PC11 (15), PC5 (16). 17, Haplophragmoides eggeri Cushman, 1926, PC060611. 18, Haplophragmoides excavatus Cushman and Waters, 1927, PC060601. 19, Haplophragmoides cf. kirki Wickenden, 1932, PC060602. 20, Haplophragmoides porrectus Maslakova, 1955, PCs0. 21, Haplophragmoides cf. walteri (Grzybowski, 1898), PC060621. 22, Haplophragmoides horridus (Grzybowski, 1901), PC060601. 23, Haplophragmoides cf. horridus (Grzybowski, 1901), PC060604. 24, Haplophragmoides cf. porrectus Maslakova, 1955, PC060615. 25-26, Haplophragmoides sp. 1, PC060602 (25) and PC060602 (26). 27, Haplophragmoides sp. 2, PC060603. Scale bar equals 0.5 mm.