Arthrodendron subnodosiformis ( 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 : 36

Arthrodendron subnodosiformis ( Grzybowski, 1898)

Figure 14.13

1898 Hyperammina subnodosiformis ; Grzybowski, p. 274, pl. 10, figs. 5, 6.

1993 Aschemocella subnodosiformis (Grzybowski) ; Kaminski and Geroch, p. 248, pl. 1, figs. 10a- 13.

2006 Aschemocella subnodosiformis (Grzybowski) ; Kaminski, Silye, and Kender, p. 384.

2008 Arthrodendron subnodosiformis (Grzybowski) ; Kaminski, Uchman, Neagu, and Cetean, p. 108.

Material. Eight specimens from four samples.

Description. Test free, large, uniseriate, flattened, consisting of single elongated, piriform, and compressed chambers increasing rapidly in size. Wall thin and finely agglutinated.

Distribution. Grzybowski (1898) described A. subnodosiformis from the Paleogene of the Polish Carpathians; Kaminski et al. (2006) signaled it from the Miocene of Greenland Sea.

Remarks. The chambers are usually isolated and fragmentated.

Figures

FIGURE 14. Scanning electron micrographs of Hormosinelloidea from the Caltavuturo Formation cropping out at Portella Colla. 1, Ammolagena clavata (Jones and Parker, 1860) on a specimen of Psammosiphonella cylindrica (Glaessner, 1937), PCs0. 2, Ammolagena clavata (Jones and Parker, 1860), PC060607. 3-7, Caudammina gutta Benedetti and Pignatti, 2009, PC18. 8, Subreophax cf. guttifer (Brady, 1881), PC15. 9, Subreophax cf. pseudoscalaris (Samuel, 1977), PCs0. 10, Subreophax scalaris (Grzybowski, 1896), PC11. 11-12, Subreophax splendidus (Grzybowski, 1898), PC060624 (11) and PC11 (12). 13, Arthrodendron subnodosiformis (Grzybowski, 1898), PC060615. 14, Arthrodendron grandis (Grzybowski, 1898), PC050515. 15-19, Kalamopsis grzybowskii (Dylążanka, 1923), PC18 (15), PC11 (16), PC18 (17), PC060621 (18) and PC060621 (19). Scale bar equals 0.5 mm.