Eggerelloides scaber (Williamson, 1858)

Camacho, S, Moura, D, Connor, S, Scott, DB & Boski, T, 2015, Taxonomy, ecology and biogeographical trends of dominant benthic foraminifera species from an Atlantic-Mediterranean estuary (the Guadiana, southeast Portugal), Palaeontologia Electronica 52 (4), pp. 1-37 : 22

Eggerelloides scaber (Williamson, 1858)

Figure 3.22

1858 Bulimina scabra Williamson : p. 65, pl. 5, figs. 136, 137.

1960 Eggerella scabra (Williamson) ; Hofker, p. 236, pl. A, figs. 11, 12.

1971 Eggerella scabra (Williamson) ; Murray, p. 45, pl. 15, figs. 1-6.

1987 Eggerelloides scabrus (Williamson) ; Loeblich and Tappan, p. 48, pl. 189, figs. 5-7.

1994 Eggerelloides scaber (Williamson) ; Jones, p. 52, pl. 47, figs. 15-17.

1995 Eggerella scabra (Williamson) ; Lévy, Mathieu, Poignant, Rosset-Moulinier, Ubaldo and Lebreiro, p. 19, pl. 2, fig. 9.

2004 Eggerelloides scaber (Williamson) ; Mendes, Gonzalez, Dias, Lobo and Martins, p. 178, pl. 1, fig. 3.

2012 Eggerelloides scabrus (Williamson) ; Milker and Schmiedl, p. 37, fig. 10.9.

2014 Eggerelloides scaber (Williamson) ; GenBank ID: 160331, www.ncbi.nlm.nih.gov/Taxonomy/Browser/ wwwtax.cgi?id=160331andlvl=0

Morphological description. Agglutinated, oblong test; initial part is trochospirally arranged but is reduced to triserial in the adult; chambers gradually increasing in size as added, so the last whorl commonly forms half the length of the test; the aperture is an interiomarginal arch in the center of the apertural face; coarsely agglutinated wall.

Occurrence. Rare species in the living assemblage but abundant in the dead assemblage;

occurs mainly at the lower reaches of the estuary,

at the lower stands of the marsh; more abundant in winter.

Remarks. The juvenile specimens can be easily confused with other Eggerella species.

Figures

FIGURE 3. Scanning electron and light microscope micrographs of the foraminifera specimens. Scale bar equals 100 µm except where noted otherwhise; 1-2- Jadammina macrescens (Brady, 1870); 1- supplementary apertures view; 2- detail of supplementary apertures (scale bar = 50 µm); 3-4- Lepidodeuterammina plymouthensis Brönnimann and Whittaker, 1990; 3- dorsal view; 4- ventral view; 5-8- Lepidodeuterammina ochracea (Williamson, 1858); 5- dorsal view; 6- ventral view; 7- dorsal view of a smaller specimen; 8- ventral view of a smaller specimen; 9-10- Portatrochammina sp.; 9- dorsal view; 10- ventral view; 11-13- Siphotrochammina sp.; 11- dorsal side with inter-cameral foramen view; 12- dorsal view of a smaller specimen, also with inter-cameral foramen; 13- ventral view of a smaller specimen; 14-16- Tiphotrocha comprimata Saunders, 1957; 14- dorsal view; 15- ventral view; 16- individual strongly attached to a sea-grass leaf; detail of a Pinus pollen grain at the center of the leaf; 17-21- Trochammina inflata (Montagu, 1808); 17- dorsal view; 18- ventral view; 19- ventral view with umbilical tube detail; 20- microspheric form dorsal view; 21- microspheric form ventral view; 22- Eggerelloides scaber (Williamson, 1858); 23-25- Textularia earlandi Parker, 1952; 23- apertural view; 24- lateral view; 25- profile view with aperture in detail; 26-29- Discorinopsis aguayoi (Bermúdez, 1935); 26- scanning electron dorsal view; 27- scanning electron ventral view; 28- light microscope dorsal view; 29- light microscope ventral view.