Miliammina fusca ( Brady, 1870 )

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 : 19

Miliammina fusca ( Brady, 1870)

Figure 2.24-2.26

1870 Quinqueloculina fusca Brady : p. 286, pl. 11, figs. 2, 3.

1953 Miliammina fusca ( Brady, 1870) ; Parker, Phleger and Pierson, p. 10, pl. 1, figs. 40, 41.

1980 Miliammina fusca ( Brady, 1870) ; Scott and Medioli, p. 40, pl. 2, figs. 1-3.

1990 Miliammina fusca ( Brady, 1870) ; Scott, Schnack, Ferrero, Espinosa and Barbosa, p. 731, pl. 1, fig. 4.

2003 Miliammina fusca ( Brady, 1870) ; Javaux and Scott, p. 16, fig. 6.7.

2013 Miliammina fusca ( Brady, 1870) ; GenBank, ID: 302103, www.ncbi.nlm.nih.gov/Taxonomy/Browser/ wwwtax.cgi?id=302103&lvl=0

Morphological description. Test agglutinated,

elongated, ovate, of half coil in a quinqueloculine pattern; wall relatively thick, medium to coarse agglutinated; aperture at the end of the chamber,

rounded to semilunate, depending on the degree of compression against the previous whorl and may be produced on a short neck.

Occurrence. One of the most ubiquitous agglutinated species in the Guadiana Estuary, dominating mid-low environments in the upper reaches of the estuary.

Figures

FIGURE 2. Scanning electron micrographs of the foraminifera specimens. Scale bar equals 100 µm. 1-3- Three different specimens of Polysaccammina ipohalina Scott, 1976b, illustrating the differences in size and form. In all specimens it is possible to see attached organic matter; 4-5- Polysaccammina hyperhalina Medioli, Scott, and Petrucci, 1983. 4- complete specimen of P. hyperhalina; 5- aperture view; 6- specimen with several side branches; 7-10- different sized specimens of Ammovertellina sp.; 11-14- various specimens of Reophax nana Rhumbler, 1913; 15-17- Leptohalysis scottii (Chaster, 1892); 15 and 16- side view of two complete specimens; 17- detail on the agglutination of the last chamber; 18- complete specimen of Ammobaculites exiguus Cushman and Brönnimann, 1948b; 19- Ammobaculites sp. with the uncoiled portion broken; 20-22- Ammotium salsum (Cushman and Brönnimann, 1948a); 20- best specimen; 21- smaller specimen; 22- aperture detail; 23- Ammotium sp.; 24-26- different specimens of Miliammina fusca (Brady, 1870); 27-28- Miliammina obliqua Heron-Allen and Earland, 1930; 27- view of the interio-marginal arch of the aperture; 29-30- Arenoparrella mexicana (Kornfeld, 1931); 29- ventral side with view to main aperture and supplementary apertures; 30- dorsal side with view to supplementary apertures; 31-32- Deuterammina eddystonensis Brönnimann and Whittaker, 1990; 31- dorsal view; 32- ventral view; 33-35- Jadammina macrescens (Brady, 1870); 33- dorsal view; 34- ventral view; 35- dorsal view of a deformed test.