Elphidium gerthi Van Voorthuysen, 1957

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 : 26-27

Elphidium gerthi Van Voorthuysen, 1957

Figure 5.16-5.18

1957 Elphidium gerthi Van Voorthuysen : p. 32, pl. 23, fig. 12.

1995 Cribrononion gerthi (Van Voorthuysen) ; Lévy, Mathieu, Poignant, Rosset-Moulinier, Ubaldo and Lebreiro, p. 51, pl. 12, fig. 2.

2004 Cribrononion gerthi (Van Voorthuysen) ; Martins and Gomes, p. 257-258, fig. 2.152. 2008 Elphidium sp. Diz and Francés: pl. 2, fig. 3. 2012 Elphidium gerthi Van Voorthuysen ; Mendes, Dias, Schönfeld and Ferreira, p. 24, fig. 4.8.

Morphological description. The wall is calcareous; test is planispiral, compressed and slightly evolute; the umbilical area is large and slightly depressed; nine to eleven chambers in the final whorl; sutures depressed, curved close to the periphery, crossed by sutural bridges or retral processes, with several fossettes; the aperture is multiple with several interomarginal arches.

Occurrence. Relatively abundant species (<10%) in Guadiana estuary, along middle to lower estuary.

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.