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Species / Anchura Catedralis

Anchura Catedralis

Stromboidea


Original Description of Anchura catedralis by von der Osten, 1957, p. 589:

  • "Shell large, fusiform, whorls slightly convex, sutures incised; spire of four or five whorls; height of whorls almost one-half of width; sculpture of strong, wide, radial ribs, anteriorly inclined downwards, nodose posteriorly, becoming strong nodes in body whorl, about 11 to the whorl, crossed by approximately 44 fine spiral threads, arranged in bands of one stronger thread followed by three weaker; growth-lines faintly marked; body whorl about three times height of last spiral whorl; posterior portion of outer lip thickened, extending upwards and outwards, forming a thick, almost rectangular process, possibly alate downwards (not present in holotype), reaching to about center of preceding whorl; inner lip thickened; aperture long, extending into anterior canal, unavailable in holotype; spiral angle 35°."

Locus typicus: MMH locality Su 90, islands to the north of the Bahía de Santa Fé, eastern Venezuela

Stratum typicum: Taguarumo member, Barranquin Formation, Aptian

Types: Holotype. - A well preserved shell, lacking the top of the spire, a part of the anterior canal, and a portion of the alate proces, collected from the base of the Taguarumo member of the Barranquin formation, at MMH locality Su 90.

Dimensions: - Height of incomplete shell 60 mm., diameter 23 mm., probable original height 70 mm.

Discussion. - This species bears little resemblance to other Cretaceous Anchuras form North America, with the exception of Anchura plenecosta Stephenson from the Navarro group of Texas. It is however much larger than the Texas species, the orientation of the alate process is downwards instead of upwards, and the whole aspect of the shell is coarser. The latter is true also for its comparison with the other Texas Anchuras, which have a more delicate aspect."

Anchura catedralis von der Osten, 1957, pl. 65, figs. 11, 12


History and Synonymy

1985

Etayo-Serna (1985) reported A. catedralis from the Lower Cretaceous of Colombia.


References

  • Von Der Osten, E. (1957). A Fauna from the Lower Cretaceous Barranquín Formation of Venezuela. Journal of Paleontology, 31(3), 571-590.
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