Lenticulina orbicularis (d’Orbigny, 1826)

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 : 9

Lenticulina orbicularis (d’Orbigny, 1826)

Figure 2.6-7

1826 Robulina orbicularis d’Orbigny , p. 288, pl. 15, figs. 8-9.

2010 Lenticulina orbicularis (d’Orbigny) ; Margreth, p. 150, pl. 12, fig. 8a-b.

2012 Lenticulina orbicularis (d’Orbigny) ; Debenay, p. 224.

2012 Lenticulina orbicularis (d’Orbigny) ; Milker and Schmiedl, p. 73, figs. 18.19-20.

Description. Test rounded, strongly biconvex, peripheral view lenticular, wall finely perforate, surface smooth, umbo prominent; chambers many, narrow; periphery with a thick keel, sutures strongly curved; aperture terminal, radiate, with a slit on the apertural side.

Figures

FIGURE 2. 1-3, Amphicoryna scalaris (Batsch, 1791) in dorsal view (scale equals 200 μm) (1); in apertural view (scale equals 100 μm) (2); and macrospheric form in dorsal view (scale equals 300 μm) (3). 4, Lenticulina cultrata (de Montfort, 1808) in dorsal view (scale equals 500 μm). 5, Lenticulina gibba (d’Orbigny, 1826) in dorsal view (scale equals 500 μm). 6-7, Lenticulina orbicularis (d’Orbigny, 1826) in dorsal view (scale equals 300 μm) (6) and in apertural view (scale equals 300 μm) (7). 8-9, Lenticulina suborbicularis Parr, 1950 in dorsal view (scale equals 100 μm) (8) and in apertural view (scale equals 100 μm) (9). 10, Marginulinopsis costata (Batsch, 1791) in dorsal view (scale equals 1 mm). 11, Dentalina ittai Loeblich and Tappan, 1953 in dorsal view (scale equals 200 μm). 12, Pyramidulina catesbyi (d’Orbigny, 1839) in dorsal view (scale equals 200 μm). 13-14, Pseudolingulina bradii (Silvestri, 1903) in dorsal view (scale equals 400 μm) (13) and in apertural view (scale equals 100 μm) (14). 15, Lagena aspera Reuss, 1861 in dorsal view (scale equals 300 μm). 16, Lagena perlucida (Montagu, 1803) in dorsal view (scale equals 300 μm). 17, Lagena semistriata Williamson, 1848 in dorsal view (scale equals 200 μm). 18, Lagena striata (d’Orbigny, 1839) in dorsal view (scale equals 100 μm). 19, Lagena strumosa Reuss, 1858 in dorsal view (scale equals 200 μm). 20, Hyalinonetrion gracillima (Seguenza, 1862) in dorsal view (scale equals 300 μm). 21, Lagena substriata Williamson, 1848 in dorsal view (scale equals 200 μm). 22, Procerolagena gracilis (Williamson, 1848) in dorsal view (scale equals 200 μm). 23, Procerolagena sp. in dorsal view (scale equals 100 μm). 24, Reussoolina laevis (Montagu, 1803) in dorsal view (scale equals 100 μm). 25, Favulina hexagona (Williamson, 1848) in dorsal view (scale equals 50 μm).

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).

FIGURE 4. 1, Gaudryina angulata Cushman, 1924 in dorsal view (scale equals 300 μm). 2, Gaudryina convexa (Karrer, 1865) in dorsal view (scale equals 300 μm). 3, Reophax agglutinatus Cushman, 1913 in dorsal view (scale equals 500 μm). 4-5, Reophax scorpiurus de Montfort, 1808 in dorsal view (scale equals 500 μm) (4) and in dorsal view (scale equals 400 μm) (5). 6, Nodulina dentaliniformis (Brady, 1881) in dorsal view (scale equals 500 μm). 7-8, Ammonia beccarii (Linnaeus, 1758) in dorsal view (scale equals 100 μm) (7) and in ventral view (scale equals 500 μm) (8). 9-10, Ammonia parkinsoniana (d’Orbigny, 1839) in dorsal view (scale equals 200 μm) (9) and in ventral view (scale equals 200 μm) (10). 11-12, Ammonia tepida (Cushman, 1926) in dorsal view (scale equals 200 μm) (11) and in ventral view (scale equals 200 μm) (12). 13-14, Asterorotalia dentata (Parker and Jones, 1865) in dorsal view (scale equals 500 μm) (13) and in ventral view (scale equals 500 μm) (14). 15-16, Asterorotalia inflata (Millett, 1904) in dorsal view (scale equals 100 μm) (15) and in ventral view (scale equals 100 μm) (16). 17-18, Rotalidium annectens Parker and Jones, 1865 in dorsal view (scale equals 500 μm) (17) and in ventral view (scale equals 400 μm) (18). 19- 21, Rotalinoides compressiuscula (Brady, 1884) in dorsal view (scale equals 200 μm) (19); in ventral view (scale equals 200 μm) (20); and in lateral view (scale equals 100 μm) (21).

FIGURE 5. 1-2, Rotalinoides gaimardii (d’Orbigny, 1826) in dorsal view (scale equals 200 μm) (1) and in ventral view (scale equals 300 μm) (2). 3-6, Neorotalia calcar (d’Orbigny, 1839) in dorsal view (scale equals 400 μm) (3); in ventral view (scale equals 300 μm) (4); elongate form in dorsal view (scale equals 400 μm) (5); and elongate form in ventral view (scale equals 400 μm) (6). 7-8. Pararotalia boltovskoyi Jain and Bhatia, 1978 in dorsal view (scale equals 200 μm) (7) and in ventral view (scale equals 200 μm) (8). 9-10, Pararotalia calcariformata McCulloch, 1977 in dorsal view (scale equals 200 μm) (9) and in ventral view (scale equals 200 μm) (10). 11-12, Pararotalia nipponica Asano, 1936 in dorsal view (scale equals 200 μm) (11) and in ventral view (scale equals 300 μm) (12). 13-14, Pararotalia venusta (Brady, 1884) in dorsal view (scale equals 300 μm) (13) and in ventral view (scale equals 300 μm) (14). 15-16, Calcarina hispida Brady, 1876 in dorsal view (scale equals 500 μm) (15) and in ventral view (scale equals 500 μm) (16).

FIGURE 6. 1-2, Calcarina spengleri (Gmelin, 1791) in dorsal view (scale equals 500 μm) (1) and in ventral view (scale equals 500 μm) (2). 3, Cribroelphidium excavatum (Terquem, 1875) in ventral view (scale equals 100 μm). 4, Cribroelphidium poeyanum (d’Orbigny, 1826) in dorsal view (scale equals 100 μm). 5, Elphidiella hannai (Cushman and Grant, 1927) in ventral view (scale equals 200 μm). 6, Elphidium advenum subsp. limbatum (Chapman, 1907) in dorsal view (scale equals 200 μm). 7, Elphidium advenum var. depressulum Cushman, 1933 in ventral view (scale equals 200 μm). 8, Elphidium asiaticum Polski, 1959 in ventral view (scale equals 100 μm). 9, Elphidium botaniense Albani, 1981 in ventral view (scale equals 200 μm). 10, Elphidium carteri Hayward in Hayward, Hollis and Grenfell, 1997 in dorsal view (scale equals 100 μm). 11, Elphidium charlottense (Vella, 1957) in dorsal view (scale equals 200 μm). 12, Elphidium charlottense (Vella, 1957) in apertural view (scale equals 200 μm). 13, Elphidium craticulatum (Fichtel and Moll, 1798) in dorsal view (scale equals 400 μm). 14, Elphidium crispum (Linnaeus, 1758) in dorsal view (scale equals 300 μm). 15-16, Elphidium hispidulum Cushman, 1936 in apertural view (scale equals 300 μm) (15) and in dorsal view (scale equals 300 μm) (16). 17, Elphidium macellum (Fichtel and Moll, 1798) in dorsal view (scale equals 300 μm). 18, Elphidium somaense Takayanagi, 1955 in ventral view (scale equals 200 μm). 19, Elphidium striatopunctatum (Fichtel and Moll, 1798) in dorsal view (scale equals 400 μm). 20, Nonion fabum (Fichtel and Moll, 1798) in dorsal view (scale equals 200 μm).

FIGURE 7. 1-2, Amphistegina bicirculata Larsen, 1976 in dorsal view (scale equals 1 mm) (1) and in ventral view (scale equals 1 mm) (2). 3-4, Amphistegina gibbosa d’Orbigny, 1839 in dorsal view (scale equals 500 μm) (3) and in lateral view (scale equals 500 μm) (4). 5, Amphistegina lessonii d’Orbigny in Guerin-Meneville, 1843 in dorsal view (scale equals 400 μm). 6-7, Amphistegina papillosa Said, 1949 in dorsal view (scale equals 500 μm) (6) and in lateral view (scale equals 300 μm) (7). 8-10, Amphistegina radiata (Fichtel and Moll, 1798) in dorsal view (scale equals 500 μm) (8); in ventral view (scale equals 500 μm) (9); and in lateral view (scale equals 500 μm) (10). 11, Astrononion stelligerum (d'Orbigny, 1839) in dorsal view (scale equals 300 μm). 12, Nonion commune (d'Orbigny, 1846) in dorsal view (scale equals 200 μm). 13, Nonion costiferum (Cushman, 1926) in dorsal view (scale equals 200 μm). 14, Nonionella basispinata (Cushman and Moyer, 1930) in dorsal view (scale equals 200 μm). 15, Nonionellina labradorica (Dawson, 1860) in dorsal view (scale equals 200 μm). 16, Nonionoides elongatum (d'Orbigny, 1852) in dorsal view (scale equals 200 μm). 17, Nonionoides grateloupii (d'Orbigny, 1839a) in dorsal view (scale equals 200 μm). 18, Nonionoides turgida (Williamson, 1858) in ventral view (scale equals 100 μm). 19, Nonionoides boueana (d'Orbigny, 1846) in dorsal view (scale equals 200 μm). 20, Haynesina depressula (Walker and Jacob, 1798) in dorsal view (scale equals 100 μm).