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Current identification:
Original Description
Диаметр первого оборота 0,05 мм второго О, 15 мм третьего 0,37 мм
В каждом обороте насчитывается до пяти камер. Очертание камер со спинной стороны крыловидное, с брюшнойтреугольное. Размеры камер в обороте возрастают постепенно, с брюшной стороны камеры незначительно перекрывают друг друга. Швы как с брюшной, так и со спинной стороны вогнутые. Периферический край приостренный, слабо лопастный, с зазубринами. Пупок маленький, узкий, глубокий. Поверхность шероховатая, больше с брюшной стороны. Устье расположено у краевого шва последней камеры, протягивается от пупка до середины (и более) краевого шва.
Google Translate
The shell is small, round, biconvex. The ventral side is more convex than the dorsal. The ratio of the bulges of the dorsal side to the abdominal 1: 3. Revolutions in a spiral 3. The first revolution is not clearly distinguishable on all copies.
The diameter of the first revolution is 0.05 mm of the second 0.15 mm of the third 0.37 mm
In each revolution, there are up to five chambers. The shape of the chambers on the dorsal side is pterygoid, with the abdominal triangular. The dimensions of the chambers in circulation increase gradually, from the ventral side of the chamber they slightly overlap. The seams from both the abdominal and dorsal sides are concave. The peripheral edge is suspended, weakly lobed, with notches. The umbilicus is small, narrow, deep. The surface is rough, more on the ventral side. The aperture is located at the marginal suture of the last chamber; it extends from the umbilicus to the middle (or more) of the marginal suture.
Size:
Extra details from original publication
Геологический возраст. (Миоцен - верхннй сармат).
Globorotalia avanensis compiled by the pforams@mikrotax project team viewed: 9-9-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=132720 Go to Archive.is to create a permanent copy of this page - citation notes |
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