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Foraminifera taxon detailsElazigina siderea Consorti & Rashidi, 2018 †
 1336979 (urn:lsid:marinespecies.org:taxname:1336979)
accepted
Species
marine,
fossil only
Consorti, L.; Rashidi, K. (2018). A new evidence of passing the Maastichtian-Paleocene boundary by larger benthic foraminifers: the case of Elazigina from the Maastrichtian Tarbur Formation of Iran. <em>Acta Palaeontologica Polonica.</em> 63(3): 595-605., available online at https://doi.org/10.4202/app.00487.2018 [details] Available for editors
 [request]
Description A set of 10 to 14 piles bed circularly the umbilical plug, some of these piles are fused with the plug periphery forming a...
Description A set of 10 to 14 piles bed circularly the umbilical plug, some of these piles are fused with the plug periphery forming a lobed outline. Chamber walls are thick, but the wall of the last chambers may appear thinner. The spiral canal bears between the piles and the umbilical plates. There may be funnels between the piles line and the umbilical plug, but it is sometimes difficult to distinguish the spiral canal from the funnels. The intraseptal interlocular space opens to the exterior and is partially subdivided by the branches of the feathering. The feathered space may be very wide, so much to reach the periphery the dorsal side. There are three whorls; the last one is sometimes incomplete. There are seven chambers in the first, 10–11 chambers in the second and 15–16 in the third whorl. Shell diameter of most complete specimens ranges 0.85–0.9 mm and its thickness may vary between 0.5 mm and 0.55 mm; the diameter on axial ratio is around 1.6. The plug diameter at the umbilicus of adult specimens is 0.23 mm, it extends longitudinally for more than 0.4 mm. Feather branches are up to 0.12 mm long and 0.05 mm thick. No microspheric specimens have been found, the diameter of the megalosphere is around 0.06 mm. [details]
Hayward, B.W.; Le Coze, F.; Vachard, D.; Gross, O. (2024). World Foraminifera Database. Elazigina siderea Consorti & Rashidi, 2018 †. Accessed at: https://www.marinespecies.org/foraminifera/aphia.php?p=taxdetails&id=1336979 on 2024-07-03
Date action by
original description
Consorti, L.; Rashidi, K. (2018). A new evidence of passing the Maastichtian-Paleocene boundary by larger benthic foraminifers: the case of Elazigina from the Maastrichtian Tarbur Formation of Iran. <em>Acta Palaeontologica Polonica.</em> 63(3): 595-605., available online at https://doi.org/10.4202/app.00487.2018 [details] Available for editors
[request] From editor or global species database
Description A set of 10 to 14 piles bed circularly the umbilical plug, some of these piles are fused with the plug periphery forming a lobed outline. Chamber walls are thick, but the wall of the last chambers may appear thinner. The spiral canal bears between the piles and the umbilical plates. There may be funnels between the piles line and the umbilical plug, but it is sometimes difficult to distinguish the spiral canal from the funnels. The intraseptal interlocular space opens to the exterior and is partially subdivided by the branches of the feathering. The feathered space may be very wide, so much to reach the periphery the dorsal side. There are three whorls; the last one is sometimes incomplete. There are seven chambers in the first, 10–11 chambers in the second and 15–16 in the third whorl. Shell diameter of most complete specimens ranges 0.85–0.9 mm and its thickness may vary between 0.5 mm and 0.55 mm; the diameter on axial ratio is around 1.6. The plug diameter at the umbilicus of adult specimens is 0.23 mm, it extends longitudinally for more than 0.4 mm. Feather branches are up to 0.12 mm long and 0.05 mm thick. No microspheric specimens have been found, the diameter of the megalosphere is around 0.06 mm. [details]Diagnosis Medium-size lamellar perforate shell of chambers arranged in a low trochospire. The dorsal side is low convex. Convexity of the ventral side may be sometimes exaggerated. Periphery unkeeled, slightly acute or somewhat rounded. A large massive umbilical plug occupies the central part of the ventral side. Piles present all around the umbilical plug. Ventral sutures heavy feathered. Folia small and slightly oblique. Presence of spiral, vertical (funnels) and intraseptal interlocular spaces. [details] |