Spirillinida

Hippocrepinina

Belongs within: Spirillinida. The Hippocrepinina are a group of agglutinated foraminiferans with a commonly elongate test composed of a globular proloculus followed by a tubular pseudochamber (Kaminski 2014). In the Hippocrepinoidea the inner chamber is undivided or only weakly divided into pseudochambers of the wall. Division of pseudochambers is more marked in the Hormosinelloidea. Hyperamminids:… Continue reading Hippocrepinina

Belongs within: Sar.Contains: Hippocrepinina, Ammodiscoidea, Patellinida, Spirillinidae, Cymbaloporidae, Involutinidae, Archaediscoida. The Spirillinida are a lineage of foraminiferans in which the test is composed a proloculus followed by an enrolled tubular crystal, with a terminal aperture. The wall may be agglutinated or composed of low magnesium, monocrystalline calcite (Pawlowski et al. 2013). Spirillinida [Spirillinacea, Spirillinata]PHT13 |–Ammodiscida [Ammodiscana]PHT13 | | i.… Continue reading Spirillinida

Tetrataxidae

Belongs within: Archaediscoida. The Tetrataxidae are a group of conical Foraminifera known from the lower Carboniferous to the Triassic. In the genus Tetrataxis, all of the numerous low, broad chambers are visible on the spiral side of the test, and only a few visible on the umbilical side (Loeblich & Tappan 1964). Characters (Loeblich & Tappan 1964):… Continue reading Tetrataxidae