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Bucanella nana
Taxonomy
Bucanella nana was named by Meek (1871). Its type specimen is USNM 7858, a shell, and it is a 3D body fossil. It is the type species of Bucanella.
Synonymy list
| Year | Name and author |
|---|---|
| 1871 | Bucanella nana Meek p. 426 |
| 1941 | Bucanella nana Knight p. 59 figs. pl. 7 f. 3b |
| 1960 | Bucanella nana Knight et al. p. 175 |
| 1974 | Bucanella nana Peel p. 233 figs. f. 1 |
| 2023 | Bucanella nana Wagner p. 4077 |
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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.
†Bucanella nana Meek 1871
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. B. Meek 1871 | Very small and much like Bucania trilobatus, Hall, but much smaller, with proportionally larger umbilicus, and its three or four volutions increasing less rapidly in breadth, both transversely and in the direction of the plane of the shell; wile its middle lobe is proportionally narrower, and embraced by each succeeding turn. | |
| J. B. Knight 1941 | Very small, three-lobed, widely phaneromphalous, spiral gastropods with a deep, narrow sinus on the median lobe; whorl profile three-lobed, the median lobe rather narrow and relatively high with a strongly rounded crest, the lateral lobes separated from the median lobe by a rounded depression, with narrowly rounded umbilical shoulders; umbilici wide, umbilical sutures deep; whorls seemingly embracing the median lobe of the previous whorl; outer lip with a narrow, rather deep sinus on the median lobe culminating roundly over the crest of the lobe and seemingly not giving rise to a selenizone, the margin of the lip without flare and passing straight outward from the umbilical sutures across the umbilical shoulders and about halfway across the anterior face of the lateral lobes before turning roundly into the sinus; parietal lip unknown; ornamentation rather coarse, crowded lines of growth or lirae; shell thin, its structure unknown. The holotype has a diameter o f about 4$ mm. and a width of 3 mm. |