Neoconorbina Hofker, 1951

Toefy, R., Gibbons, M. J. & McMillan, I. K., 2005, The foraminifera associated with the alga Gelidium pristoides, South Africa, African Invertebrates 46, pp. 1-26 : 14

Neoconorbina Hofker, 1951 Neoconorbina sp. “A”

Fig. 5B

Description: Test round, trochsospiral. Early chambers subglobular, increasing in breadth, final chamber extends almost half periphery. Radial sutures raised and curved, suture of final chamber almost completely horizontal. Wall finely perforate. Width = 124 µm, height = 150 µm, width:height = 0.83:1.

Material examined: A27411.

Distribution: Around South Africa from St James to Port Elizabeth.

Remarks: The identification of this specimen as Neoconorbina is not entirely certain; it may also be Gavelinopsis sp. or Pileolina sp. All three of these genera have chambers which enlarge as they are added, so that the final sutures become strongly oblique. Gavelinopsis hamatus ( Hayward et al. 1999) has an umbilical plug and is finely perforate whereas Neoconorbina sp. “A” has enlarged dense pores on the central chambers. Neoconorbina terquemi ( Hayward et al. 1999) is smooth to finely perforate, lacking rows of large pores or papillae. Pileolina zealandica ( Hayward et al. 1999) has a flat umbilical side with strong central tubercles with numerous branching striae towards the periphery; it is more finely perforate than Neoconorbina sp. “A”.

Figures

Fig. 5 A–L: (A) Trifarina angulosa (Williamson, 1858); (B) Neoconcorbina sp. “A”; (C, D) Rosalina cf. globularis d’Orbigny, 1826; (E) Rosalina sp. “A”; (F–H) Glabratella australensis (Heron-Allen & Earland, 1932); (I, J) Patellina corrugata Williamson, 1858; (K) Ammonia parkinsoniana (d’Orbigny, 1839); (L) Pararotalia nipponica (Asano, 1936).