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Bucania erratica

Gastropoda - Bellerophontida - Bucaniidae

Taxonomy
Bucania erratica was named by Frisk and Ebbestad (2007) [= Bucaniella sp. Lindström 1953: 130.]. Its type specimen is PMU T312, a shell, and it is a 3D body fossil. Its type locality is Tvären 2 drill-core, Tvären Impact Crater, which is in a Kukruse carbonate limestone in the Dalby Formation of Sweden.

Synonymy list
YearName and author
2007Bucania erratica Frisk and Ebbestad pp. 89 - 91 figs. 4I-4T
2013Bucania erratica Ebbestad et al. pp. 314 - 315 fig. 8O–W

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
RankNameAuthor
orderBellerophontidaUlrich and Scofield 1897
suborderBellerophontina
superfamilyBellerophontoidea()
familyBucaniidae
subfamilyBucaniinae
genusBucania
specieserratica

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.

†Bucania erratica Frisk and Ebbestad 2007
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Diagnosis
ReferenceDiagnosis
Å. M. Frisk and J. O. R. Ebbestad 2007A species of Bucania Hall, 1847 with four depressed
lenticular whorls. Ornamentation consists of dense, crenulated
but non-lamellose growth lines without distinct increments.

Shell with four rapidly expanding whorls. Whorl expansion rate (W) equals 2.5–3.0. Whorl profile depressed lenticular. The periphery lies at the middle of the whorl with no further thickening of the periphery. Overlap of whorls slight. Apertural angle moderately wide. Little or no anterior expansion of last whorl. Short flare develops at aperture at maturity. Apertural sinus broad and shallow. Slit deep and narrow, probably extending half a whorl back from the aperture. Selenizone narrow, 1/10 of whorl width, positioned on a slightly raised median dorsal crest having thin adaperturally concave lunulae. Shell ornamentation on dorsal and umbilical sides consists of dense, crenulated growth lines but non-lamellose, barely increasing in width and spacing during ontogeny.