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Loxoplocus (Donaldiella) karczewskii
Taxonomy
Loxoplocus (Donaldiella) karczewskii was named by Krawczyński (2002). Its type specimen is GIUS 4−1293/Pan−21, a shell, and it is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 2002 | Loxoplocus (Donaldiella) karczewskii Krawczyński p. 273–274 figs. 6A-E |
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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.
†Loxoplocus (Donaldiella) karczewskii Krawczyński 2002
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Krawczyński 2002 | High turriculate shell with rounded aperture; narrow distinctly prominent selenizone at the periphery of the whorl. Septation present in the older part of the spire. Loxoplocus (Donaldiella) karczewskii sp. nov. differs from the type species L. (Donaldiella) filosa (Donald, 1902) by its more slender spire and more prominent selenizone. The Late Silurian L. (Donaldiella) morinensis Horný, 1952 has an oval aperture and a differing whorl profile.
Description.—Shell turriculate (about 10 cm in height), number of whorls unknown; shape of whorl distinctly angular; deep notch in center of outer lip, forming a narrow convex selenizone at the periphery of the whorl; growth lines prosoclinal above selenizone and opisthoclinal below it, base with orthoclinal growth lines; ornamentation consists of a strong spiral cord midway between the suture and periphery on the sutural ramp, anomphalous base with two spiral cords: the first one of which is just above suture and the weak second cord is situated between the periphery and lower suture; aperture rounded; protoconch unknown; septation common in the older part of the spire (see Fig. 15A); pleural angle constant (about 12°), variability of the translation index (Hw/Ww) low (Fig. 10). |
Measurements
No measurements are available
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| Source: g = genus, o = order | |||||
| References: Bambach et al. 2007, Hendy 2009 | |||||
Age range: Late/Upper Frasnian or 379.50000 to 376.10000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Frasnian | Poland | Loxoplocus karczewskii (62177) |