Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India Author Symphonia, Tabita K. Author Senthil, Nathan D. text Palaeontologia Electronica 2019 55 A 2019-09-30 22 3 1 89 http://dx.doi.org/10.26879/811 journal article 10.26879/811 1094-8074 10961656 Pyrgo williamsoni (Silvestri, 1923) Figure 20.8 1923 Biloculina williamsoni Silvestri , p. 73. 2003 Pyrgo williamsoni (Silvestri) ; Murray, p. 17, pl. 4, figs. 7-8. 2010 Pyrgo williamsoni (Silvestri) ; Margreth, p. 103, pl. 9, fig. 6a-c. Description. Test ovate, elongate, tapering at the apertural end, aboral end broad, wall porcelaneous, imperforate, surface smooth; chambers added obliquely, biloculine chamber arrangement, coiling involute, periphery subacutely rounded, sutures distinct, slightly depressed; aperture elliptical, with a simple bifid tooth.