Elphidium williamsoni Haynes, 1973

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 : 26

Elphidium williamsoni Haynes, 1973

Figure 5.12-5.15

1973 Elphidium williamsoni Haynes : p. 207, pl. 24, fig. 7; pl. 25, figs. 6, 9; pl. 27, figs. 1-3.

1997 Elphidium excavatum (Terquem, 1875) f. williamsoni Haynes ; Hayward, Hollis and Grenfell, p. 79, pl. 10, figs. 11-18.

2004 Elphidium williamnsoni Haynes ; Leorri and Cearreta, p. 93, pl. 1, fig. 4.

2014 Elphidium williamnsoni Haynes ; Pawlowski and Holzmann, forambarcoding.unige.ch/specs/105- elphidium-williamsoni

2014 Elphidium williamnsoni Haynes ; GenBank, ID: 139273, www.ncbi.nlm.nih.gov/Taxonomy/Browser/ wwwtax.cgi?id=139273andlvl=0

2014 Elphidium williamnsoni Haynes ; this study; European Nucleotide Archive (ENA) http:// www.ebi.ac.uk/ena/data/view/LN551930- LN551935

Morphological description. The wall is calcareous, planispiral enrolled; test with evenly rounded outline, becoming lobulate in later part; periphery broadly rounded to sub-acute; septal bridges long,

evenly spaced and numerous.

Occurrence. Relatively abundant species (<10%)

in Guadiana lower estuary, mainly during winter.

Figures

FIGURE 5. Scanning electron and light microscope micrographs of the foraminifera specimens. Scale bar equals 100 µm. 1- Lamarckina haliotidea (Heron-Allen and Earland, 1911) ventral view; 2-3- Asterigerinata mamilla (Williamson, 1858); 2- dorsal view; 3- ventral view; 4-5- Discorbis sp.; 4- dorsal view; 5- ventral view; 6-7- Helenina anderseni (Warren, 1957); 6- dorsal view; 7- ventral view; 8- Haynesina depressula (Walker and Jacob, 1798) side view; 9- Haynesina germanica (Ehrenberg, 1840) side view; 10- Elphidium advenum (Cushman, 1922) side view; 11- Elphidium excavatum (Terquem, 1875) side view; 12-15- Elphidium wiliamsoni Haynes, 1973; 12- side view in light microscope image; 13- side view in scanning electron image; 14- profile view in scanning electron image; 15- side view of a smaller specimen in scanning electron image; 16-18- side view of different size Elphidium gerthi Van Voorthuysen, 1957; 19-21- Elphidium oceanensis (d’Orbigny, 1826); 19- side view in scanning electron image; 20- profile view in scanning electron image; 21- side view in light microscope image; 22- Elphidium poeyanum (d’Orbigny, 1826) side view; 24-27- Ammonia sp1; 24- dorsal view; 25- profile view; 26- ventral view; 27- dorsal view in light microscope image; 28-31- Ammonia sp2 (Ammonia aberdoveyensis Haynes, 1973); 28- dorsal view; 29- profile view; 30- ventral view; 31- dorsal view in light microscope image; 32-35- Ammonia sp3 (Ammonia aberdoveyensis Haynes, 1973); 32- dorsal view; 33- profile view; 34- ventral view; 35- dorsal view in light microscope image.