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Planctostoma
Taxonomy
Planctostoma was named by Loeblich and Tappan (1955). It is extant. It is the type genus of Planctostomatinae. It was considered unknown by Loeblich and Tappan (1955).
It was assigned to Planctostomatinae by Loeblich and Tappan (1955).
It was assigned to Planctostomatinae by Loeblich and Tappan (1955).
Synonymy list
| Year | Name and author |
|---|---|
| 1955 | Planctostoma Loeblich and Tappan p. 8 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. Planctostoma Loeblich and Tappan 1955
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Loeblich and H. Tappan 1955 | Test free, elongate, chambers biserially arranged, but in rare specimens the last chambers may lose the biseriality and become central, very rarely the last few chambers being uniserial; wall agglutinated, simple in structure; aperture at the base of the last chamber in the young stage, but moves rapidly up into the face and typically consists of a rounded opening in the terminal face, commonly somewhat off-center; occasional specimens may even have a multiple aperture of two or three rounded openings. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections
No collection or age range data are available