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Loxostomum
Taxonomy
Loxostomum was named by Ehrenberg (1854) [Sepkoski's age data: K Coni-u T Pale]. It was considered unknown by Loeblich and Tappan (1962).
It was assigned to Foraminiferida by Sepkoski (2002); and to Loxostomatidae by Loeblich and Tappan (1962), Al Menoufy and Shreif (2021).
It was assigned to Foraminiferida by Sepkoski (2002); and to Loxostomatidae by Loeblich and Tappan (1962), Al Menoufy and Shreif (2021).
Species lacking formal opinion data
Entered
by J. Sepkoski on 2003-01-23; modified by K. Jamson on 2021-01-18
Synonymy list
| Year | Name and author |
|---|---|
| 1854 | Loxostomum Ehrenberg p. 22 |
| 1962 | Loxostomum Loeblich and Tappan p. 110 |
| 2002 | Loxostomum Sepkoski |
| 2021 | Loxostomum Al Menoufy and Shreif p. 17 |
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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. †Loxostomum Ehrenberg 1854
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Loeblich and H. Tappan 1962 | Test elongate, compressed, quadrate in section, with flat or concave sides; chambers biserially arranged throughout, strongly overlapping and arched in the adult with a tendency to become uniserial; sutures limbate, arched, the sutural thickening merging laterally into the longitudinal carinae at the four margins; wall calcareous, finely perforate; aperture terminal, slit-like to ovate, commonly with a lip which may be very finely tuberculate, but lacking any internal toothplate. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Collections (52 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Thanetian | South Pacific | L. limonense (255033) | |
| Bartonian | Egypt | L. sp. (239107) | |
| Oligocene | North Atlantic | L. sinuosum (121377) | |
| Miocene | South Pacific | L. truncatum (269791) | |
| Pliocene | South Pacific | L. truncatum (269742) | |
| Early/Lower Pliocene - Quaternary | South Pacific | L. karrerianum (244035) | |
| Pleistocene | South Pacific | L. karrerianum (243731 246165 246166 246167 246168 269643 269820 269827 270262) L. truncatum (254997) | |
| Pleistocene | North Pacific | L. pseudobeyrichi (261599 261602 261604) L. pseudobeyrichi, L. sp. (261593) L. sp. (261594) | |
| Quaternary | South Pacific | L. karrerianum (258342) | |
| C2r.1r | North Pacific | L. pseudobeyrichi (268034 268035 268036) L. pseudobeyrichi, L. sp. (268041) L. sp. (268040) | |
| C2r.1r - Cobb Mountain | North Pacific | L. pseudobeyrichi (268032) | |
| Cobb Mountain - C1r.2r | North Pacific | L. pseudobeyrichi (268031) | |
| Jaramillo | North Pacific | L. pseudobeyrichi (268024 268025 268027) | |
| Jaramillo - Matuyama | North Pacific | L. pseudobeyrichi, L. sp. (268023) | |
| Middle Pleistocene | South Pacific | L. karrerianum (273984 273985 273986 273987 273989 273992 273993 273995) | |
| Late/Upper Pleistocene | South Pacific | L. karrerianum (273965 273974 273975 273976 273977 273978 273983) L. truncatum (273967) | |
| Late/Upper Pleistocene - Holocene | South Pacific | L. karrerianum (273964) | |
| Holocene | South Pacific | L. karrerianum (243729 273963) |