Spiroplectammina sagittula (Defrance, 1824)

Symphonia, Tabita K. & Senthil, Nathan D., 2019, Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India, Palaeontologia Electronica (55 A) 22 (3), pp. 1-89 : 16

Spiroplectammina sagittula (Defrance, 1824)

Figure 3.13

1824 Textularia sagittula Defrance , p. 177, pl. 13, fig. 5-5a.

2003 Textularia sagittula (Defrance) ; Murray, p. 15, fig. 3.12-14.

2006 Spiroplectinella sagittula (d’Orbigny) ; Oflaz, p. 129, pl. 1, fig. 2.

Description. Test elongate, slightly compressed laterally, outline subtriangular, wall agglutinated, surface smooth; chambers biserially arranged, gradually increasing in size as added; periphery subacute, sutures curved, slightly depressed; aperture terminal, low arched opening, bordered by a lip.

Figures

FIGURE 3. 1, Fissurina laevigata Reuss, 1850 in dorsal view (scale equals 400 μm). 2, Fissurina orbignyana Seguenza, 1862 in lateral view (scale equals 100 μm). 3-4, Glandulina ovula d’Orbigny, 1846 in dorsal view (scale equals 300 μm) (3) and in apertural view (scale equals 200 μm) (4). 5, Pseudopolymorphina sp. in dorsal view (scale equals 500 μm). 6, Sigmoidella elegantissima (Parker and Jones, 1865) in dorsal view (scale equals 300 μm). 7, Ammobaculites agglutinans (d’Orbigny, 1846) in dorsal view (scale equals 500 μm). 8, Ammobaculites exiguus Cushman and Brönnimann, 1948 in dorsal view (scale equals 300 μm). 9-10, Ammobaculites persicus Lutze, 1974 in dorsal view (scale equals 200 μm) (9) and in ventral view (scale equals 200 μm) (10). 11, Ammoscalaria pseudospiralis (Williamson, 1858) in dorsal view (scale equals 300 μm). 12, Labrospira crassimargo (Norman, 1892) in dorsal view (scale equals 200 μm). 13, Spiroplectammina sagittula (Defrance, 1824) in dorsal view (scale equals 400 μm). 14, Spiroplectinella wrightii (Silvestri, 1903) in dorsal view (scale equals 500 μm). 15, Spirotextularia floridana (Cushman, 1922a) in dorsal view (scale equals 500 μm). 16, Eggerelloides scaber (Williamson, 1858) in dorsal view (scale equals 100 μm). 17-18, Asterorotalia pulchella (d’Orbigny, 1839) in dorsal view (scale equals 500 μm) (17) and in dorsal view with long spines (scale equals 500 μm) (18).