Miliolina

Miliolina

[‚mil·ē′äl·ə·nə]
(invertebrate zoology)
A suborder of the Foraminiferida characterized by a porcelaneous, imperforate calcite wall.
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A total of 18,811 specimens were obtained, corresponding to 5 suborders--Textulariina, Spirillinina, Miliolina, Lagenina and Robertinina-, 13 families, 26 genera and 66 species (Figs.
However, representatives of the suborder Miliolina, almost absent in the section of Zambujal de Alcaria, attaint important relative abundances in some assemblages.
Recorded foraminiferal assemblages present a high relative abundance of the representatives of the suborder Lagenina (90.2%), followed by representatives of suborders Miliolina (5.6%) and Textulariina (3.5%), the representatives of suborders Spirillinina (0.6%) and Robertinina (0.1%) being only minor components.
The assemblages are dominated by representatives of the suborder Lagenina (90%), followed by Textulariina (6.1%), Spirillinina (2.3%) and very scarce representatives of suborders Miliolina (1.3%) and Robertinina (0.3%).
They are constituted by typical taxa of the Boreal Realm, on which representatives of the suborder Lagenina are the most abundant components (Haynes, 1981; Murray, 1989), usually accompanied by variable percentages of representatives of the suborders Textulariina, Spirillinina, Miliolina, Robertinina and Rotaliina depending on paleoecological conditions.
Representatives of the suborder Miliolina are relatively important components in the assemblages from Maria Pares (5.6%), but display low relative abundances in Zambujal de Alcaria (1.3%).
Concerning the representatives of the suborder Miliolina, they have been related with warm waters (Copestake and Johnson, 1981; Haynes, 1981; Murray, 1989), attaining up to 40% in assemblages from subtropical temperatures (Alegret, 2004).
In the section of Maria Pares the second most abundant genus is Vinelloidea (suborder Miliolina) that has already been emphasized by Henriques and Canales (2013) for a neighbouring coeval interval in the section of Sao Giao, as a result of relatively high warm seawater temperature interpreted as due to local causes.
To explain the high relative abundance of the representatives of the suborder Miliolina in the Maria Pares section, located in the middle part of the shelf, warmer water conditions must be invoked, as previously argued by Henriques and Canales (2013) in the near locality of Sao Giao, where representatives of the suborder Miliolina attaint relative abundances up to 76%.
The abundance of Miliolina indicating a depth range of (0-50 m.)Le calvez1973 Bandy [17] and Murray [1].
The secondary components correspond to the orders Lagenina (13%, Lenticulina, Dentalina, Nodosaria, Marginulina, Astacolus, and Planularia), Miliolina (9%, Ophthalmidium) and Robertinina (1% Epistomina).
Adelosina cliarensis (Heron-Allen and Earland) = Miliolina cliarensis Heron-Allen and Earland, 1930 (TL, TD, B, MD, M)