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Eukteanochiton milleri
Taxonomy
Eukteanochiton milleri was named by Vendrasco and Runnegar (2004). Its type specimen is LACMIP 12837, a valve, and it is a 3D body fossil. It is the type species of Eukteanochiton.
Synonymy list
| Year | Name and author |
|---|---|
| 2004 | Eukteanochiton milleri Vendrasco and Runnegar p. 684 fig. 12.1–12.13 |
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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.
†Eukteanochiton milleri Vendrasco and Runnegar 2004
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. J. Vendrasco and B. Runnegar 2004 | Valves thick, short (less than 2 cm long), elongate (mean length/width 3.3); concave apical area, extends 60 percent length of valve, ornamented by growth lines; two tunnels, extend most of length of valve; tail valves taller and narrower than intermediate plates.
Intermediate valves (Fig. 12.1–12.8, 12.13) subconical, elongate (mean length/width 3.3, SD = 0.5, n = 7); thick, but thin at anterior end; dorsal and ventral margins diverge at a mean angle of 10.3 degrees (SD = 1.4, n = 7); not very tall (mean height 0.37 cm, SD = 0.06, n = 7); gently convex jugal ridge; embayment at anterior margin of valve, rounded margin; ventrolateral margins of valve straight, apical angle small (mean 10.4 degrees, SD = 4.4, n = 7); some specimens possess a groove along dorsal midline, indicating a partially abraded jugal ridge revealing a tunnel; dorsal tunnel has small, circular, constant diameter, runs straight, parallel to midline, from anterior end to near apex; ventral tunnel close to apical area, flat on ventral side and arched dorsally, wider than long, most of thickness of valve dorsal to this tunnel; apical area extends 60 percent of length of valve, ornamented with growth lines, slightly concave, with short, rounded embayment at anterior end. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy 2009, Kiessling 2003 | |||||