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Quadricarina noklebergi
Taxonomy
Quadricarina (Quadricarina) noklebergi was named by Frýda and Blodgett (2004). Its type specimen is ČGU JF 78, a shell, and it is a 3D body fossil. Its type locality is 83RB9, south flank of Limestone Mountain, which is in an Emsian carbonate limestone in the Limestone Mountain Formation of Alaska.
It was recombined as Quadricarina noklebergi by Wagner (2023).
It was recombined as Quadricarina noklebergi by Wagner (2023).
Synonymy list
Year | Name and author |
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2004 | Quadricarina (Quadricarina) noklebergi Frýda and Blodgett pp. 113 - 114 figs. 2.1-2.5 |
2023 | Quadricarina noklebergi Wagner p. S3969 |
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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.
†Quadricarina noklebergi Frýda and Blodgett 2004
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Diagnosis
Reference | Diagnosis | |
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J. Frýda and R. B. Blodgett 2004 | Small, high spired species of Quadricarina with distinctly cyrtoconoid spire and fine reticulate ornament; diameter of protoconch about 0.23 mm.
Description. Small, turbiniform, distinctly cyrtoconoid shell having up to six whorls; spire higher than wide; selenizone situated just above lower suture and forming shell periphery on adult whorls; width of selenizone about one-fourth of distance between sutures; selenizone slightly protruding above the whorl surface and bordered by two pairs of revolving cords; distance of outer pair of cords forming margin of selenizone about three times higher than the width of selenizone; inner pair of cords thinner than outer cords; upper and lower whorl surfaces convex; shell base rounded and phaneromphalous; whorl joins preceeding whorl just below selenizone; selenizone higher on more juvenile whorls and starting from about end of first whorl (Fig. 2.1–2.3); shell ornamentation consisting of fine spiral and collabral threads forming a reticulate pattern (Fig. 2.5); diameter of protoconch about 0.23 mm (Fig. 2.4). |
Measurements
No measurements are available
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Source: o = order | |||||
Reference: Bambach et al. 2007 |
Age range: Early/Lower Emsian or 409.10000 to 402.50000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Early/Lower Emsian | USA (Alaska) | Quadricarina noklebergi (type locality: 49107) |