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Ulminium mulleri
Taxonomy
Ulminium mulleri was named by Page (1967). It is considered to be a form taxon. Its type specimen is Stanford University Paleontology Type Collection 6868 and is a 3D body fossil. Its type locality is Black Gulch, which is in a Maastrichtian marine horizon in the Panoche Formation of California.
Synonymy list
Year | Name and author |
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1967 | Ulminium mulleri Page p. 511 figs. 4-6, 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.
†Ulminium mulleri Page 1967
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Diagnosis
Reference | Diagnosis | |
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V. M. Page 1967 | Specimen 4.5 cm by 8 cm composed of secondary xylem and bark. Pores round, mostly solitary, some in clusters of 3-4 or in radial multiples; tangential diameter avg 103 μ (81-127 μ.) ; radial diameter avg 93μ (46-116 μ.). Growth rings not detectable. Vessel elements avg 580 μ. in length; pits small, alternate, some in smaller vessels transitional; perforation plates simple; tyloses abundant. Parenchyma vasicentric, sparse. Fibers septate with brown contents; about 812μ. in length. Rays avg 649μ. in height (406- 1160 μ.) ; 2-4 cells wide with uniseriate margins 1-3 rows of square cells. Cells large and irregular in shape and size with brown contents; uniseriates scarce, composed of upright or square cells; pits to vessels large; occasional large, inflated cells in rays. Bark composed of alternating groups of sclerenchyma nine cells thick and bands of crushed tissue of thin-walled cells. Isolated stone cells in outer layers; only inner bark is present . |
Measurements
No measurements are available
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Source: p = phylum | |||||
Reference: Kiessling 2009 |
Age range: Maastrichtian or 72.10000 to 66.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Maastrichtian | USA (California) | Ulminium mulleri (type locality: 191731) |